Package apple.uikit.protocol

Interface UIGestureRecognizerDelegate

All Known Implementing Classes:

PDFView, UITableViewCell

public interface UIGestureRecognizerDelegate

Method Summary

Modifier and Type	Method	Description
default boolean	gestureRecognizerShouldBegin(@NotNull UIGestureRecognizer gestureRecognizer)	called when a gesture recognizer attempts to transition out of UIGestureRecognizerStatePossible.
default boolean	gestureRecognizerShouldBeRequiredToFailByGestureRecognizer(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UIGestureRecognizer otherGestureRecognizer)	API-Since: 7.0
default boolean	gestureRecognizerShouldReceiveEvent(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UIEvent event)	called once before either -gestureRecognizer:shouldReceiveTouch: or -gestureRecognizer:shouldReceivePress: return NO to prevent the gesture recognizer from seeing this event API-Since: 13.4
default boolean	gestureRecognizerShouldReceivePress(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UIPress press)	called before pressesBegan:withEvent: is called on the gesture recognizer for a new press.
default boolean	gestureRecognizerShouldReceiveTouch(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UITouch touch)	called before touchesBegan:withEvent: is called on the gesture recognizer for a new touch.
default boolean	gestureRecognizerShouldRecognizeSimultaneouslyWithGestureRecognizer(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UIGestureRecognizer otherGestureRecognizer)	called when the recognition of one of gestureRecognizer or otherGestureRecognizer would be blocked by the other return YES to allow both to recognize simultaneously.
default boolean	gestureRecognizerShouldRequireFailureOfGestureRecognizer(@NotNull UIGestureRecognizer gestureRecognizer, @NotNull UIGestureRecognizer otherGestureRecognizer)	called once per attempt to recognize, so failure requirements can be determined lazily and may be set up between recognizers across view hierarchies return YES to set up a dynamic failure requirement between gestureRecognizer and otherGestureRecognizer note: returning YES is guaranteed to set up the failure requirement.

Method Detail

gestureRecognizerShouldBeRequiredToFailByGestureRecognizer

default boolean gestureRecognizerShouldBeRequiredToFailByGestureRecognizer(@NotNull
                                                                           @NotNull UIGestureRecognizer gestureRecognizer,
                                                                           @NotNull
                                                                           @NotNull UIGestureRecognizer otherGestureRecognizer)

API-Since: 7.0

gestureRecognizerShouldReceivePress

default boolean gestureRecognizerShouldReceivePress(@NotNull
                                                    @NotNull UIGestureRecognizer gestureRecognizer,
                                                    @NotNull
                                                    @NotNull UIPress press)

called before pressesBegan:withEvent: is called on the gesture recognizer for a new press. return NO to prevent the gesture recognizer from seeing this press

gestureRecognizerShouldReceiveTouch

default boolean gestureRecognizerShouldReceiveTouch(@NotNull
                                                    @NotNull UIGestureRecognizer gestureRecognizer,
                                                    @NotNull
                                                    @NotNull UITouch touch)

called before touchesBegan:withEvent: is called on the gesture recognizer for a new touch. return NO to prevent the gesture recognizer from seeing this touch

gestureRecognizerShouldRecognizeSimultaneouslyWithGestureRecognizer

default boolean gestureRecognizerShouldRecognizeSimultaneouslyWithGestureRecognizer(@NotNull
                                                                                    @NotNull UIGestureRecognizer gestureRecognizer,
                                                                                    @NotNull
                                                                                    @NotNull UIGestureRecognizer otherGestureRecognizer)

called when the recognition of one of gestureRecognizer or otherGestureRecognizer would be blocked by the other return YES to allow both to recognize simultaneously. the default implementation returns NO (by default no two gestures can be recognized simultaneously) note: returning YES is guaranteed to allow simultaneous recognition. returning NO is not guaranteed to prevent simultaneous recognition, as the other gesture's delegate may return YES

gestureRecognizerShouldRequireFailureOfGestureRecognizer

default boolean gestureRecognizerShouldRequireFailureOfGestureRecognizer(@NotNull
                                                                         @NotNull UIGestureRecognizer gestureRecognizer,
                                                                         @NotNull
                                                                         @NotNull UIGestureRecognizer otherGestureRecognizer)

called once per attempt to recognize, so failure requirements can be determined lazily and may be set up between recognizers across view hierarchies return YES to set up a dynamic failure requirement between gestureRecognizer and otherGestureRecognizer note: returning YES is guaranteed to set up the failure requirement. returning NO does not guarantee that there will not be a failure requirement as the other gesture's counterpart delegate or subclass methods may return YES API-Since: 7.0

gestureRecognizerShouldBegin

default boolean gestureRecognizerShouldBegin(@NotNull
                                             @NotNull UIGestureRecognizer gestureRecognizer)

called when a gesture recognizer attempts to transition out of UIGestureRecognizerStatePossible. returning NO causes it to transition to UIGestureRecognizerStateFailed

gestureRecognizerShouldReceiveEvent

default boolean gestureRecognizerShouldReceiveEvent(@NotNull
                                                    @NotNull UIGestureRecognizer gestureRecognizer,
                                                    @NotNull
                                                    @NotNull UIEvent event)

called once before either -gestureRecognizer:shouldReceiveTouch: or -gestureRecognizer:shouldReceivePress: return NO to prevent the gesture recognizer from seeing this event API-Since: 13.4