If within your MDCChipField you want chips that can be deleted follow these steps.

Accessibility

Enabling this flag will add 24x24 touch targets within the chip view. This goes against Google's recommended 48x48 touch targets. We recommend if you enable this behavior your associate it with a MDCSnackbar or MDCDialog to confirm allow the user to confirm their behavior.

Swift

let chipField = MDCChipField()
chipField.showChipsDeleteButton = true

Objective-C

MDCChipField *chipField = [[MDCChipField alloc] init];
chipField.showChipsDeleteButton = YES;