components/TextFields/examples/TextFieldCustomFontExample.m - external/github.com/material-components/material-components-ios - Git at Google

 // Copyright 2019-present the Material Components for iOS authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 // http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #import "MaterialTextFields.h"

 @interface TextFieldCustomFontExample : UIViewController <UITextFieldDelegate, UITextViewDelegate>

 @property(nonatomic) MDCTextInputControllerOutlined *systemFontController;
 @property(nonatomic) MDCTextInputControllerOutlined *systemFontDynamicController;
 @property(nonatomic) MDCTextInputControllerOutlined *customFontController;
 @property(nonatomic) MDCTextInputControllerOutlined *customFontDynamicController;

 @property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineController;
 @property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineDynamicController;
 @property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineCustomFontDynamicController;

 @property(nonatomic) UIFont *normalTextFont;

 @property(nonatomic) UIScrollView *scrollView;

 @end

 @implementation TextFieldCustomFontExample

 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }

 - (void)viewDidLoad {
   [super viewDidLoad];
   self.view.backgroundColor = [UIColor whiteColor];

   [self registerKeyboardNotifications];

   [self setupScrollView];

   // Create a System Font TextField.
   MDCTextField *systemFontTextField = [self setupSystemFontTextField];

   // Create a System Font Dynamic TextField.
   MDCTextField *systemFontDynamicTextField = [self setupSystemFontDynamicTextField];

   // Create a Custom Font TextField.
   MDCTextField *customFontTextField = [self setupCustomFontTextField];
   ;

   // Create a Custom Font Dynamic TextField.
   MDCTextField *customFontDynamicTextField = [self setupCustomFontDynamicTextField];
   ;

   // Create a System Multiline TextField.
   MDCMultilineTextField *multilineTextField = [self setupSystemMultilineTextField];

   // Create a System Multiline Dynamic TextField.
   MDCMultilineTextField *multilineDynamicTextField = [self setupSystemMultilineDynamicTextField];

   // Create a Custom Multiline Dyamic TextField.
   MDCMultilineTextField *multilineCustomDynamicTextField =
       [self setupCustomMultilineDynamicTextField];

   NSDictionary *views = @{
     @"t1" : systemFontTextField,
     @"t2" : systemFontDynamicTextField,
     @"t3" : customFontTextField,
     @"t4" : customFontDynamicTextField,
     @"t5" : multilineTextField,
     @"t6" : multilineDynamicTextField,
     @"t7" : multilineCustomDynamicTextField
   };
   NSMutableArray<NSLayoutConstraint *> *constraints = [NSMutableArray
       arrayWithArray:[NSLayoutConstraint
                          constraintsWithVisualFormat:@"V:[t1]-[t2]-[t3]-[t4]-[t5]-[t6]-[t7]"

                                              options:NSLayoutFormatAlignAllLeading |
                                                      NSLayoutFormatAlignAllTrailing
                                              metrics:nil
                                                views:views]];
   [constraints addObject:[NSLayoutConstraint constraintWithItem:systemFontTextField
                                                       attribute:NSLayoutAttributeLeading
                                                       relatedBy:NSLayoutRelationEqual
                                                          toItem:self.view
                                                       attribute:NSLayoutAttributeLeadingMargin
                                                      multiplier:1
                                                        constant:0]];
   [constraints addObject:[NSLayoutConstraint constraintWithItem:systemFontTextField
                                                       attribute:NSLayoutAttributeTrailing
                                                       relatedBy:NSLayoutRelationEqual
                                                          toItem:self.view
                                                       attribute:NSLayoutAttributeTrailingMargin
                                                      multiplier:1
                                                        constant:0]];
   if (@available(iOS 11.0, *)) {
     [NSLayoutConstraint activateConstraints:@[
       [NSLayoutConstraint constraintWithItem:systemFontTextField
                                    attribute:NSLayoutAttributeTop
                                    relatedBy:NSLayoutRelationEqual
                                       toItem:self.scrollView.contentLayoutGuide
                                    attribute:NSLayoutAttributeTop
                                   multiplier:1
                                     constant:20],
       [NSLayoutConstraint constraintWithItem:multilineCustomDynamicTextField
                                    attribute:NSLayoutAttributeBottom
                                    relatedBy:NSLayoutRelationEqual
                                       toItem:self.scrollView.contentLayoutGuide
                                    attribute:NSLayoutAttributeBottomMargin
                                   multiplier:1
                                     constant:-20]
     ]];
   } else {
     [NSLayoutConstraint activateConstraints:@[
       [NSLayoutConstraint constraintWithItem:systemFontTextField
                                    attribute:NSLayoutAttributeTop
                                    relatedBy:NSLayoutRelationEqual
                                       toItem:self.scrollView
                                    attribute:NSLayoutAttributeTop
                                   multiplier:1
                                     constant:20],
       [NSLayoutConstraint constraintWithItem:multilineCustomDynamicTextField
                                    attribute:NSLayoutAttributeBottom
                                    relatedBy:NSLayoutRelationEqual
                                       toItem:self.scrollView
                                    attribute:NSLayoutAttributeBottomMargin
                                   multiplier:1
                                     constant:-20]
     ]];
   }

   [NSLayoutConstraint activateConstraints:constraints];
 }

 - (void)setupScrollView {
   self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectZero];
   self.scrollView.translatesAutoresizingMaskIntoConstraints = NO;
   [self.view addSubview:self.scrollView];
   id<UILayoutSupport> topGuide = self.topLayoutGuide;
   NSArray *constraints = [NSLayoutConstraint
       constraintsWithVisualFormat:@"V:|[topGuide]-[scrollView]|"
                           options:0
                           metrics:nil
                             views:@{@"topGuide" : topGuide, @"scrollView" : self.scrollView}];

   [NSLayoutConstraint activateConstraints:constraints];
   constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollView]|"
                                                         options:0
                                                         metrics:nil
                                                           views:@{@"scrollView" : self.scrollView}];
   [NSLayoutConstraint activateConstraints:constraints];
   UIEdgeInsets margins = UIEdgeInsetsMake(0, 16, 0, 16);
   self.scrollView.layoutMargins = margins;

   UITapGestureRecognizer *tapGestureRecognizer =
       [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDidTouch:)];
   [self.scrollView addGestureRecognizer:tapGestureRecognizer];
 }

 - (MDCTextField *)setupSystemFontTextField {
   MDCTextField *systemFontTextField = [[MDCTextField alloc] init];
   self.normalTextFont = systemFontTextField.font;
   systemFontTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:systemFontTextField];

   systemFontTextField.delegate = self;
   systemFontTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
   systemFontTextField.backgroundColor = [UIColor whiteColor];

   self.systemFontController =
       [[MDCTextInputControllerOutlined alloc] initWithTextInput:systemFontTextField];
   self.systemFontController.placeholderText = @"System Font";
   self.systemFontController.mdc_adjustsFontForContentSizeCategory = NO;
   return systemFontTextField;
 }

 - (MDCTextField *)setupSystemFontDynamicTextField {
   MDCTextField *systemFontDynamicTextField = [[MDCTextField alloc] init];
   systemFontDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:systemFontDynamicTextField];

   systemFontDynamicTextField.delegate = self;
   systemFontDynamicTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
   systemFontDynamicTextField.backgroundColor = [UIColor whiteColor];

   self.systemFontDynamicController =
       [[MDCTextInputControllerOutlined alloc] initWithTextInput:systemFontDynamicTextField];
   self.systemFontDynamicController.placeholderText = @"System Font - Dynamic";
   self.systemFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
   return systemFontDynamicTextField;
 }

 - (MDCTextField *)setupCustomFontTextField {
   MDCTextField *customFontTextField = [[MDCTextField alloc] init];
   customFontTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:customFontTextField];

   customFontTextField.delegate = self;
   customFontTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
   customFontTextField.backgroundColor = [UIColor whiteColor];

   self.customFontController =
       [[MDCTextInputControllerOutlined alloc] initWithTextInput:customFontTextField];
   self.customFontController.placeholderText = @"Custom Font";
   self.customFontController.mdc_adjustsFontForContentSizeCategory = NO;
   self.customFontController.leadingUnderlineLabelFont = [UIFont fontWithName:@"AmericanTypewriter"
                                                                         size:12];
   self.customFontController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
                                                                          size:12];
   self.customFontController.inlinePlaceholderFont = [UIFont fontWithName:@"AmericanTypewriter"
                                                                     size:12];
   self.customFontController.textInputFont = [UIFont fontWithName:@"Chalkduster" size:16];
   return customFontTextField;
 }

 - (MDCTextField *)setupCustomFontDynamicTextField {
   MDCTextField *customFontDynamicTextField = [[MDCTextField alloc] init];
   customFontDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;

   customFontDynamicTextField.delegate = self;
   customFontDynamicTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
   customFontDynamicTextField.backgroundColor = [UIColor whiteColor];

   self.customFontDynamicController =
       [[MDCTextInputControllerOutlined alloc] initWithTextInput:customFontDynamicTextField];
   self.customFontDynamicController.placeholderText = @"Custom Font - Dynamic";
   self.customFontDynamicController.helperText = @"Helper";
   self.customFontDynamicController.leadingUnderlineLabelFont = [UIFont fontWithName:@"Zapfino"
                                                                                size:12];
   self.customFontDynamicController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
                                                                                 size:12];
   self.customFontDynamicController.inlinePlaceholderFont = [UIFont fontWithName:@"Zapfino" size:12];
   self.customFontDynamicController.textInputFont = [UIFont fontWithName:@"Zapfino" size:16];
   self.customFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;

   [self.scrollView addSubview:customFontDynamicTextField];
   return customFontDynamicTextField;
 }

 - (MDCMultilineTextField *)setupSystemMultilineTextField {
   MDCMultilineTextField *multilineTextField = [[MDCMultilineTextField alloc] init];
   multilineTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:multilineTextField];

   multilineTextField.textView.delegate = self;

   self.multilineController =
       [[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:multilineTextField];
   self.multilineController.placeholderText = @"Multiline Text";
   self.multilineController.mdc_adjustsFontForContentSizeCategory = NO;
   return multilineTextField;
 }

 - (MDCMultilineTextField *)setupSystemMultilineDynamicTextField {
   MDCMultilineTextField *multilineDynamicTextField = [[MDCMultilineTextField alloc] init];
   multilineDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:multilineDynamicTextField];

   multilineDynamicTextField.textView.delegate = self;

   self.multilineDynamicController =
       [[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:multilineDynamicTextField];
   self.multilineDynamicController.placeholderText = @"Multiline Dynamic Text";
   self.multilineDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
   return multilineDynamicTextField;
 }

 - (MDCMultilineTextField *)setupCustomMultilineDynamicTextField {
   MDCMultilineTextField *multilineCustomDynamicTextField = [[MDCMultilineTextField alloc] init];
   multilineCustomDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
   [self.scrollView addSubview:multilineCustomDynamicTextField];

   multilineCustomDynamicTextField.textView.delegate = self;

   self.multilineCustomFontDynamicController = [[MDCTextInputControllerOutlinedTextArea alloc]
       initWithTextInput:multilineCustomDynamicTextField];
   self.multilineCustomFontDynamicController.placeholderText = @"Multiline Custom Font Dynamic Text";
   self.multilineCustomFontDynamicController.leadingUnderlineLabelFont =
       [UIFont fontWithName:@"AmericanTypewriter" size:12];
   self.customFontDynamicController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
                                                                                 size:12];
   self.multilineCustomFontDynamicController.inlinePlaceholderFont = [UIFont fontWithName:@"Zapfino"
                                                                                     size:12];
   self.multilineCustomFontDynamicController.textInputFont =
       [UIFont fontWithName:@"AmericanTypewriter" size:16];
   self.multilineCustomFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
   return multilineCustomDynamicTextField;
 }

 #pragma mark - UITextFieldDelegate

 - (BOOL)textFieldShouldReturn:(UITextField *)textField {
   [textField resignFirstResponder];

   return NO;
 }

 - (BOOL)textField:(UITextField *)textField
     shouldChangeCharactersInRange:(NSRange)range
                 replacementString:(NSString *)string {
   NSString *finishedString = [textField.text stringByReplacingCharactersInRange:range
                                                                      withString:string];

   if (textField == (UITextField *)self.systemFontController.textInput) {
     if ([finishedString rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]].length &&
         ![self.systemFontController.errorText isEqualToString:@"Error: You cannot enter numbers"]) {
       // The entered text contains numbers and we have not set an error
       [self.systemFontController setErrorText:@"You cannot enter numbers"
                       errorAccessibilityValue:nil];

       // Since we are doing manual layout, we need to react to the expansion of the input that will
       // come from setting an error.
       [self.view setNeedsLayout];
     } else if (self.systemFontController.errorText != nil) {
       // There should be no error but error text is being shown.
       [self.systemFontController setErrorText:nil errorAccessibilityValue:nil];

       // Since we are doing manual layout, we need to react to the contraction of the input that
       // will come from setting an error.
       [self.view setNeedsLayout];
     }
   }

   if (textField == (UITextField *)self.customFontController.textInput) {
     if ([finishedString rangeOfCharacterFromSet:[[NSCharacterSet letterCharacterSet] invertedSet]]
             .length > 0) {
       [self.customFontController setErrorText:@"Error: City can only contain letters"
                       errorAccessibilityValue:nil];
     } else {
       [self.customFontController setErrorText:nil errorAccessibilityValue:nil];
     }
   }
   return YES;
 }

 #pragma mark - UITextViewDelegate

 - (void)textViewDidChange:(UITextView *)textView {
   NSLog(@"%@", textView.text);
 }

 #pragma mark - Gesture Handling

 - (void)tapDidTouch:(UIGestureRecognizer *)sender {
   [self.view endEditing:YES];
 }

 #pragma mark - Keyboard Handling

 - (void)registerKeyboardNotifications {
   NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];

   [defaultCenter addObserver:self
                     selector:@selector(keyboardWillShow:)
                         name:UIKeyboardWillShowNotification
                       object:nil];
   [defaultCenter addObserver:self
                     selector:@selector(keyboardWillShow:)
                         name:UIKeyboardWillChangeFrameNotification
                       object:nil];
   [defaultCenter addObserver:self
                     selector:@selector(keyboardWillHide:)
                         name:UIKeyboardWillHideNotification
                       object:nil];
 }

 - (void)keyboardWillShow:(NSNotification *)notif {
   CGRect keyboardFrame = [notif.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
   self.scrollView.contentInset = UIEdgeInsetsMake(0, 0, CGRectGetHeight(keyboardFrame), 0);
 }

 - (void)keyboardWillHide:(NSNotification *)notif {
   self.scrollView.contentInset = UIEdgeInsetsZero;
 }

 #pragma mark - Phone Number Validation

 - (BOOL)isValidPhoneNumber:(NSString *)inputString partially:(BOOL)isPartialCheck {
   // In real life there would be much more robust validation that takes locale into account, checks
   // against invalid phone numbers (like those that begin with 0), and perhaps even auto-inserts the
   // hyphens so the user doesn't have to.

   if (inputString.length == 0) {
     return YES;
   }

   NSCharacterSet *characterSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789-"];
   characterSet = [characterSet invertedSet];

   BOOL isValid = ![inputString rangeOfCharacterFromSet:characterSet].length;

   if (!isPartialCheck) {
     isValid = isValid && inputString.length == 12;
   } else {
     isValid = isValid && inputString.length <= 12;
   }
   return isValid;
 }

 @end

 @implementation TextFieldCustomFontExample (CatalogByConvention)

 + (NSDictionary *)catalogMetadata {
   return @{
     @"breadcrumbs" : @[ @"Text Field", @"Custom Fonts" ],
     @"primaryDemo" : @NO,
     @"presentable" : @NO,
   };
 }

 @end
	// Copyright 2019-present the Material Components for iOS authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#import "MaterialTextFields.h"

	@interface TextFieldCustomFontExample : UIViewController <UITextFieldDelegate, UITextViewDelegate>

	@property(nonatomic) MDCTextInputControllerOutlined *systemFontController;
	@property(nonatomic) MDCTextInputControllerOutlined *systemFontDynamicController;
	@property(nonatomic) MDCTextInputControllerOutlined *customFontController;
	@property(nonatomic) MDCTextInputControllerOutlined *customFontDynamicController;

	@property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineController;
	@property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineDynamicController;
	@property(nonatomic) MDCTextInputControllerOutlinedTextArea *multilineCustomFontDynamicController;

	@property(nonatomic) UIFont *normalTextFont;

	@property(nonatomic) UIScrollView *scrollView;

	@end

	@implementation TextFieldCustomFontExample

	- (void)dealloc {
	[[NSNotificationCenter defaultCenter] removeObserver:self];
	}

	- (void)viewDidLoad {
	[super viewDidLoad];
	self.view.backgroundColor = [UIColor whiteColor];

	[self registerKeyboardNotifications];

	[self setupScrollView];

	// Create a System Font TextField.
	MDCTextField *systemFontTextField = [self setupSystemFontTextField];

	// Create a System Font Dynamic TextField.
	MDCTextField *systemFontDynamicTextField = [self setupSystemFontDynamicTextField];

	// Create a Custom Font TextField.
	MDCTextField *customFontTextField = [self setupCustomFontTextField];
	;

	// Create a Custom Font Dynamic TextField.
	MDCTextField *customFontDynamicTextField = [self setupCustomFontDynamicTextField];
	;

	// Create a System Multiline TextField.
	MDCMultilineTextField *multilineTextField = [self setupSystemMultilineTextField];

	// Create a System Multiline Dynamic TextField.
	MDCMultilineTextField *multilineDynamicTextField = [self setupSystemMultilineDynamicTextField];

	// Create a Custom Multiline Dyamic TextField.
	MDCMultilineTextField *multilineCustomDynamicTextField =
	[self setupCustomMultilineDynamicTextField];

	NSDictionary *views = @{
	@"t1" : systemFontTextField,
	@"t2" : systemFontDynamicTextField,
	@"t3" : customFontTextField,
	@"t4" : customFontDynamicTextField,
	@"t5" : multilineTextField,
	@"t6" : multilineDynamicTextField,
	@"t7" : multilineCustomDynamicTextField
	};
	NSMutableArray<NSLayoutConstraint > constraints = [NSMutableArray
	arrayWithArray:[NSLayoutConstraint
	constraintsWithVisualFormat:@"V:[t1]-[t2]-[t3]-[t4]-[t5]-[t6]-[t7]"

	options:NSLayoutFormatAlignAllLeading \|
	NSLayoutFormatAlignAllTrailing
	metrics:nil
	views:views]];
	[constraints addObject:[NSLayoutConstraint constraintWithItem:systemFontTextField
	attribute:NSLayoutAttributeLeading
	relatedBy:NSLayoutRelationEqual
	toItem:self.view
	attribute:NSLayoutAttributeLeadingMargin
	multiplier:1
	constant:0]];
	[constraints addObject:[NSLayoutConstraint constraintWithItem:systemFontTextField
	attribute:NSLayoutAttributeTrailing
	relatedBy:NSLayoutRelationEqual
	toItem:self.view
	attribute:NSLayoutAttributeTrailingMargin
	multiplier:1
	constant:0]];
	if (@available(iOS 11.0, *)) {
	[NSLayoutConstraint activateConstraints:@[
	[NSLayoutConstraint constraintWithItem:systemFontTextField
	attribute:NSLayoutAttributeTop
	relatedBy:NSLayoutRelationEqual
	toItem:self.scrollView.contentLayoutGuide
	attribute:NSLayoutAttributeTop
	multiplier:1
	constant:20],
	[NSLayoutConstraint constraintWithItem:multilineCustomDynamicTextField
	attribute:NSLayoutAttributeBottom
	relatedBy:NSLayoutRelationEqual
	toItem:self.scrollView.contentLayoutGuide
	attribute:NSLayoutAttributeBottomMargin
	multiplier:1
	constant:-20]
	]];
	} else {
	[NSLayoutConstraint activateConstraints:@[
	[NSLayoutConstraint constraintWithItem:systemFontTextField
	attribute:NSLayoutAttributeTop
	relatedBy:NSLayoutRelationEqual
	toItem:self.scrollView
	attribute:NSLayoutAttributeTop
	multiplier:1
	constant:20],
	[NSLayoutConstraint constraintWithItem:multilineCustomDynamicTextField
	attribute:NSLayoutAttributeBottom
	relatedBy:NSLayoutRelationEqual
	toItem:self.scrollView
	attribute:NSLayoutAttributeBottomMargin
	multiplier:1
	constant:-20]
	]];
	}

	[NSLayoutConstraint activateConstraints:constraints];
	}

	- (void)setupScrollView {
	self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectZero];
	self.scrollView.translatesAutoresizingMaskIntoConstraints = NO;
	[self.view addSubview:self.scrollView];
	id<UILayoutSupport> topGuide = self.topLayoutGuide;
	NSArray *constraints = [NSLayoutConstraint
	constraintsWithVisualFormat:@"V:\|[topGuide]-[scrollView]\|"
	options:0
	metrics:nil
	views:@{@"topGuide" : topGuide, @"scrollView" : self.scrollView}];

	[NSLayoutConstraint activateConstraints:constraints];
	constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:\|[scrollView]\|"
	options:0
	metrics:nil
	views:@{@"scrollView" : self.scrollView}];
	[NSLayoutConstraint activateConstraints:constraints];
	UIEdgeInsets margins = UIEdgeInsetsMake(0, 16, 0, 16);
	self.scrollView.layoutMargins = margins;

	UITapGestureRecognizer *tapGestureRecognizer =
	[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDidTouch:)];
	[self.scrollView addGestureRecognizer:tapGestureRecognizer];
	}

	- (MDCTextField *)setupSystemFontTextField {
	MDCTextField *systemFontTextField = [[MDCTextField alloc] init];
	self.normalTextFont = systemFontTextField.font;
	systemFontTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:systemFontTextField];

	systemFontTextField.delegate = self;
	systemFontTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
	systemFontTextField.backgroundColor = [UIColor whiteColor];

	self.systemFontController =
	[[MDCTextInputControllerOutlined alloc] initWithTextInput:systemFontTextField];
	self.systemFontController.placeholderText = @"System Font";
	self.systemFontController.mdc_adjustsFontForContentSizeCategory = NO;
	return systemFontTextField;
	}

	- (MDCTextField *)setupSystemFontDynamicTextField {
	MDCTextField *systemFontDynamicTextField = [[MDCTextField alloc] init];
	systemFontDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:systemFontDynamicTextField];

	systemFontDynamicTextField.delegate = self;
	systemFontDynamicTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
	systemFontDynamicTextField.backgroundColor = [UIColor whiteColor];

	self.systemFontDynamicController =
	[[MDCTextInputControllerOutlined alloc] initWithTextInput:systemFontDynamicTextField];
	self.systemFontDynamicController.placeholderText = @"System Font - Dynamic";
	self.systemFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
	return systemFontDynamicTextField;
	}

	- (MDCTextField *)setupCustomFontTextField {
	MDCTextField *customFontTextField = [[MDCTextField alloc] init];
	customFontTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:customFontTextField];

	customFontTextField.delegate = self;
	customFontTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
	customFontTextField.backgroundColor = [UIColor whiteColor];

	self.customFontController =
	[[MDCTextInputControllerOutlined alloc] initWithTextInput:customFontTextField];
	self.customFontController.placeholderText = @"Custom Font";
	self.customFontController.mdc_adjustsFontForContentSizeCategory = NO;
	self.customFontController.leadingUnderlineLabelFont = [UIFont fontWithName:@"AmericanTypewriter"
	size:12];
	self.customFontController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
	size:12];
	self.customFontController.inlinePlaceholderFont = [UIFont fontWithName:@"AmericanTypewriter"
	size:12];
	self.customFontController.textInputFont = [UIFont fontWithName:@"Chalkduster" size:16];
	return customFontTextField;
	}

	- (MDCTextField *)setupCustomFontDynamicTextField {
	MDCTextField *customFontDynamicTextField = [[MDCTextField alloc] init];
	customFontDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;

	customFontDynamicTextField.delegate = self;
	customFontDynamicTextField.clearButtonMode = UITextFieldViewModeUnlessEditing;
	customFontDynamicTextField.backgroundColor = [UIColor whiteColor];

	self.customFontDynamicController =
	[[MDCTextInputControllerOutlined alloc] initWithTextInput:customFontDynamicTextField];
	self.customFontDynamicController.placeholderText = @"Custom Font - Dynamic";
	self.customFontDynamicController.helperText = @"Helper";
	self.customFontDynamicController.leadingUnderlineLabelFont = [UIFont fontWithName:@"Zapfino"
	size:12];
	self.customFontDynamicController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
	size:12];
	self.customFontDynamicController.inlinePlaceholderFont = [UIFont fontWithName:@"Zapfino" size:12];
	self.customFontDynamicController.textInputFont = [UIFont fontWithName:@"Zapfino" size:16];
	self.customFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;

	[self.scrollView addSubview:customFontDynamicTextField];
	return customFontDynamicTextField;
	}

	- (MDCMultilineTextField *)setupSystemMultilineTextField {
	MDCMultilineTextField *multilineTextField = [[MDCMultilineTextField alloc] init];
	multilineTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:multilineTextField];

	multilineTextField.textView.delegate = self;

	self.multilineController =
	[[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:multilineTextField];
	self.multilineController.placeholderText = @"Multiline Text";
	self.multilineController.mdc_adjustsFontForContentSizeCategory = NO;
	return multilineTextField;
	}

	- (MDCMultilineTextField *)setupSystemMultilineDynamicTextField {
	MDCMultilineTextField *multilineDynamicTextField = [[MDCMultilineTextField alloc] init];
	multilineDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:multilineDynamicTextField];

	multilineDynamicTextField.textView.delegate = self;

	self.multilineDynamicController =
	[[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:multilineDynamicTextField];
	self.multilineDynamicController.placeholderText = @"Multiline Dynamic Text";
	self.multilineDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
	return multilineDynamicTextField;
	}

	- (MDCMultilineTextField *)setupCustomMultilineDynamicTextField {
	MDCMultilineTextField *multilineCustomDynamicTextField = [[MDCMultilineTextField alloc] init];
	multilineCustomDynamicTextField.translatesAutoresizingMaskIntoConstraints = NO;
	[self.scrollView addSubview:multilineCustomDynamicTextField];

	multilineCustomDynamicTextField.textView.delegate = self;

	self.multilineCustomFontDynamicController = [[MDCTextInputControllerOutlinedTextArea alloc]
	initWithTextInput:multilineCustomDynamicTextField];
	self.multilineCustomFontDynamicController.placeholderText = @"Multiline Custom Font Dynamic Text";
	self.multilineCustomFontDynamicController.leadingUnderlineLabelFont =
	[UIFont fontWithName:@"AmericanTypewriter" size:12];
	self.customFontDynamicController.trailingUnderlineLabelFont = [UIFont fontWithName:@"Chalkduster"
	size:12];
	self.multilineCustomFontDynamicController.inlinePlaceholderFont = [UIFont fontWithName:@"Zapfino"
	size:12];
	self.multilineCustomFontDynamicController.textInputFont =
	[UIFont fontWithName:@"AmericanTypewriter" size:16];
	self.multilineCustomFontDynamicController.mdc_adjustsFontForContentSizeCategory = YES;
	return multilineCustomDynamicTextField;
	}

	#pragma mark - UITextFieldDelegate

	- (BOOL)textFieldShouldReturn:(UITextField *)textField {
	[textField resignFirstResponder];

	return NO;
	}

	- (BOOL)textField:(UITextField *)textField
	shouldChangeCharactersInRange:(NSRange)range
	replacementString:(NSString *)string {
	NSString *finishedString = [textField.text stringByReplacingCharactersInRange:range
	withString:string];

	if (textField == (UITextField *)self.systemFontController.textInput) {
	if ([finishedString rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]].length &&
	![self.systemFontController.errorText isEqualToString:@"Error: You cannot enter numbers"]) {
	// The entered text contains numbers and we have not set an error
	[self.systemFontController setErrorText:@"You cannot enter numbers"
	errorAccessibilityValue:nil];

	// Since we are doing manual layout, we need to react to the expansion of the input that will
	// come from setting an error.
	[self.view setNeedsLayout];
	} else if (self.systemFontController.errorText != nil) {
	// There should be no error but error text is being shown.
	[self.systemFontController setErrorText:nil errorAccessibilityValue:nil];

	// Since we are doing manual layout, we need to react to the contraction of the input that
	// will come from setting an error.
	[self.view setNeedsLayout];
	}
	}

	if (textField == (UITextField *)self.customFontController.textInput) {
	if ([finishedString rangeOfCharacterFromSet:[[NSCharacterSet letterCharacterSet] invertedSet]]
	.length > 0) {
	[self.customFontController setErrorText:@"Error: City can only contain letters"
	errorAccessibilityValue:nil];
	} else {
	[self.customFontController setErrorText:nil errorAccessibilityValue:nil];
	}
	}
	return YES;
	}

	#pragma mark - UITextViewDelegate

	- (void)textViewDidChange:(UITextView *)textView {
	NSLog(@"%@", textView.text);
	}

	#pragma mark - Gesture Handling

	- (void)tapDidTouch:(UIGestureRecognizer *)sender {
	[self.view endEditing:YES];
	}

	#pragma mark - Keyboard Handling

	- (void)registerKeyboardNotifications {
	NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];

	[defaultCenter addObserver:self
	selector:@selector(keyboardWillShow:)
	name:UIKeyboardWillShowNotification
	object:nil];
	[defaultCenter addObserver:self
	selector:@selector(keyboardWillShow:)
	name:UIKeyboardWillChangeFrameNotification
	object:nil];
	[defaultCenter addObserver:self
	selector:@selector(keyboardWillHide:)
	name:UIKeyboardWillHideNotification
	object:nil];
	}

	- (void)keyboardWillShow:(NSNotification *)notif {
	CGRect keyboardFrame = [notif.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
	self.scrollView.contentInset = UIEdgeInsetsMake(0, 0, CGRectGetHeight(keyboardFrame), 0);
	}

	- (void)keyboardWillHide:(NSNotification *)notif {
	self.scrollView.contentInset = UIEdgeInsetsZero;
	}

	#pragma mark - Phone Number Validation

	- (BOOL)isValidPhoneNumber:(NSString *)inputString partially:(BOOL)isPartialCheck {
	// In real life there would be much more robust validation that takes locale into account, checks
	// against invalid phone numbers (like those that begin with 0), and perhaps even auto-inserts the
	// hyphens so the user doesn't have to.

	if (inputString.length == 0) {
	return YES;
	}

	NSCharacterSet *characterSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789-"];
	characterSet = [characterSet invertedSet];

	BOOL isValid = ![inputString rangeOfCharacterFromSet:characterSet].length;

	if (!isPartialCheck) {
	isValid = isValid && inputString.length == 12;
	} else {
	isValid = isValid && inputString.length <= 12;
	}
	return isValid;
	}

	@end

	@implementation TextFieldCustomFontExample (CatalogByConvention)

	+ (NSDictionary *)catalogMetadata {
	return @{
	@"breadcrumbs" : @[ @"Text Field", @"Custom Fonts" ],
	@"primaryDemo" : @NO,
	@"presentable" : @NO,
	};
	}

	@end