iOS手势学习UIGestureRecognizer & cocos2d 手势推荐

Posted 2020-08-07 李洪强

ios手势学习UIGestureRecognizer & cocos2d 手势推荐

手势识别类型：

UILongPressGestureRecognizer 　　// 长按
UIPanGestureRecognizer 　　　　　// 慢速拖动
UIPinchGestureRecognizer 　　　　// 两指向內或向外拨动
UIRotationGestureRecognizer 　　  // 旋转
UISwipeGestureRecognizer 　　　  // 快速滑动
UITapGestureRecognizer 　　　　  // 点击

手势协议：

@protocol UIGestureRecognizerDelegate <NSObject>
@optional
// called when a gesture recognizer attempts to transition out of UIGestureRecognizerStatePossible. returning NO causes it to transition to UIGestureRecognizerStateFailed
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer;

// 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
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

// 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
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch;

@end

手势优先级：

// create a relationship with another gesture recognizer that will prevent this gesture\'s actions from being called until otherGestureRecognizer transitions to UIGestureRecognizerStateFailed
// if otherGestureRecognizer transitions to UIGestureRecognizerStateRecognized or UIGestureRecognizerStateBegan then this recognizer will instead transition to UIGestureRecognizerStateFailed
// example usage: a single tap may require a double tap to fail
- (void)requireGestureRecognizerToFail:(UIGestureRecognizer *)otherGestureRecognizer;

各种手势Demo：UIGestureRecognizer学习笔记

cocos2d手势库推荐：SFGestureRecognizers  github链接