components/Dialogs/src/MDCAlertControllerDelegate.h

// Copyright 2020-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 <UIKit/UIKit.h>

@class MDCAlertAction;
@class MDCAlertController;

@protocol MDCAlertControllerDelegate <NSObject>

@optional

/**
 Informs the receiver that the alert controller will appear on the screen or the application is
 entering the foreground.
 */
- (void)alertController:(nonnull MDCAlertController *)alertController willAppear:(BOOL)animated;

/**
 Informs the receiver that the alert controller appeared on the screen or the application has
 entered the foreground.
 */
- (void)alertController:(nonnull MDCAlertController *)alertController didAppear:(BOOL)animated;

/**
 Informs the receiver that the alert controller will disappear from the screen or the application is
 entering the background.
 */
- (void)alertController:(nonnull MDCAlertController *)alertController willDisappear:(BOOL)animated;

/**
 Informs the receiver that the alert controller disappeared from the screen or the application has
 entered the background.
 */
- (void)alertController:(nonnull MDCAlertController *)alertController didDisappear:(BOOL)animated;

/**
 Called on the delegate after the alert action is tapped by the user and while the alert is still on
 the screen.
 */
- (void)alertController:(nonnull MDCAlertController *)alertController
           didTapAction:(nonnull MDCAlertAction *)action
              withEvent:(nonnull UIEvent *)event;

@end