UIView 添加点击事件

OS的view没有点击功能，又是和Android 的一大差别，没办法，自定义一个，本来是想自己写一个的，逛了一下github，发现有同行已经写好了，我也不需要在重复了，这里只是记录一下吧：

这里我们为UIViuew定义了Category，如下：

UIView+WhenTappedBlocks.h

[cpp]

01.#if NS_BLOCKS_AVAILABLE

02.

03.#import <UIKit/UIKit.h>

04.

05.typedef void (^JMWhenTappedBlock)();

06.

07.@interface UIView (JMWhenTappedBlocks) <UIGestureRecognizerDelegate>

08.

09.- (void)whenTapped:(JMWhenTappedBlock)block;

10.- (void)whenDoubleTapped:(JMWhenTappedBlock)block;

11.- (void)whenTwoFingerTapped:(JMWhenTappedBlock)block;

12.- (void)whenTouchedDown:(JMWhenTappedBlock)block;

13.- (void)whenTouchedUp:(JMWhenTappedBlock)block;

14.

15.@end

16.

17.#endif

#if NS_BLOCKS_AVAILABLE

#import <UIKit/UIKit.h>

typedef void (^JMWhenTappedBlock)();

@interface UIView (JMWhenTappedBlocks) <UIGestureRecognizerDelegate>

- (void)whenTapped:(JMWhenTappedBlock)block;

- (void)whenDoubleTapped:(JMWhenTappedBlock)block;

- (void)whenTwoFingerTapped:(JMWhenTappedBlock)block;

- (void)whenTouchedDown:(JMWhenTappedBlock)block;

- (void)whenTouchedUp:(JMWhenTappedBlock)block;

@end

#endifUIView+WhenTappedBlocks.m

[cpp]

01.#if NS_BLOCKS_AVAILABLE

02.

03.#import "UIView+WhenTappedBlocks.h"

04.#import <objc/runtime.h>

05.

06.@interface UIView (JMWhenTappedBlocks_Private)

07.

08.- (void)runBlockForKey:(void *)blockKey;

09.- (void)setBlock:(JMWhenTappedBlock)block forKey:(void *)blockKey;

10.

11.- (UITapGestureRecognizer*)addTapGestureRecognizerWithTaps:(NSUInteger) taps touches:(NSUInteger) touches selector:(SEL) selector;

12.- (void) addRequirementToSingleTapsRecognizer:(UIGestureRecognizer*) recognizer;

13.- (void) addRequiredToDoubleTapsRecognizer:(UIGestureRecognizer*) recognizer;

14.

15.@end

16.

17.@implementation UIView (JMWhenTappedBlocks)

18.

19.static char kWhenTappedBlockKey;

20.static char kWhenDoubleTappedBlockKey;

21.static char kWhenTwoFingerTappedBlockKey;

22.static char kWhenTouchedDownBlockKey;

23.static char kWhenTouchedUpBlockKey;

24.

25.#pragma mark -

26.#pragma mark Set blocks

27.

28.- (void)runBlockForKey:(void *)blockKey {

29. JMWhenTappedBlock block = objc_getAssociatedObject(self, blockKey);

30. if (block) block();

31.}

32.

33.- (void)setBlock:(JMWhenTappedBlock)block forKey:(void *)blockKey {

34. self.userInteractionEnabled = YES;

35. objc_setAssociatedObject(self, blockKey, block, OBJC_ASSOCIATION_COPY_NONATOMIC);

36.}

37.

38.#pragma mark -

39.#pragma mark When Tapped

40.

41.- (void)whenTapped:(JMWhenTappedBlock)block {

42. UITapGestureRecognizer* gesture = [self addTapGestureRecognizerWithTaps:1 touches:1 selector:@selector(viewWasTapped)];

43. [self addRequiredToDoubleTapsRecognizer:gesture];

44.

45. [self setBlock:block forKey:&kWhenTappedBlockKey];

46.}

47.

48.- (void)whenDoubleTapped:(JMWhenTappedBlock)block {

49. UITapGestureRecognizer* gesture = [self addTapGestureRecognizerWithTaps:2 touches:1 selector:@selector(viewWasDoubleTapped)];

50. [self addRequirementToSingleTapsRecognizer:gesture];

51.

52. [self setBlock:block forKey:&kWhenDoubleTappedBlockKey];

53.}

54.

55.- (void)whenTwoFingerTapped:(JMWhenTappedBlock)block {

56. [self addTapGestureRecognizerWithTaps:1 touches:2 selector:@selector(viewWasTwoFingerTapped)];

57.

58. [self setBlock:block forKey:&kWhenTwoFingerTappedBlockKey];

59.}

60.

61.- (void)whenTouchedDown:(JMWhenTappedBlock)block {

62. [self setBlock:block forKey:&kWhenTouchedDownBlockKey];

63.}

64.

65.- (void)whenTouchedUp:(JMWhenTappedBlock)block {

66. [self setBlock:block forKey:&kWhenTouchedUpBlockKey];

67.}

68.

69.#pragma mark -

70.#pragma mark Callbacks

71.

72.- (void)viewWasTapped {

73. [self runBlockForKey:&kWhenTappedBlockKey];

74.}

75.

76.- (void)viewWasDoubleTapped {

77. [self runBlockForKey:&kWhenDoubleTappedBlockKey];

78.}

79.

80.- (void)viewWasTwoFingerTapped {

81. [self runBlockForKey:&kWhenTwoFingerTappedBlockKey];

82.}

83.

84.- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

85. [super touchesBegan:touches withEvent:event];

86. [self runBlockForKey:&kWhenTouchedDownBlockKey];

87.}

88.

89.- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

90. [super touchesEnded:touches withEvent:event];

91. [self runBlockForKey:&kWhenTouchedUpBlockKey];

92.}

93.

94.#pragma mark -

95.#pragma mark Helpers

96.

97.- (UITapGestureRecognizer*)addTapGestureRecognizerWithTaps:(NSUInteger)taps touches:(NSUInteger)touches selector:(SEL)selector {

98. UITapGestureRecognizer* tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:selector];

99. tapGesture.delegate = self;

100. tapGesture.numberOfTapsRequired = taps;

101. tapGesture.numberOfTouchesRequired = touches;

102. [self addGestureRecognizer:tapGesture];

103.

104. return [tapGesture autorelease];

105.}

106.

107.- (void) addRequirementToSingleTapsRecognizer:(UIGestureRecognizer*) recognizer {

108. for (UIGestureRecognizer* gesture in [self gestureRecognizers]) {

109. if ([gesture isKindOfClass:[UITapGestureRecognizer class]]) {

110. UITapGestureRecognizer* tapGesture = (UITapGestureRecognizer*) gesture;

111. if (tapGesture.numberOfTouchesRequired == 1 && tapGesture.numberOfTapsRequired == 1) {

112. [tapGesture requireGestureRecognizerToFail:recognizer];

113. }

114. }

115. }

116.}

117.

118.- (void) addRequiredToDoubleTapsRecognizer:(UIGestureRecognizer*) recognizer {

119. for (UIGestureRecognizer* gesture in [self gestureRecognizers]) {

120. if ([gesture isKindOfClass:[UITapGestureRecognizer class]]) {

121. UITapGestureRecognizer* tapGesture = (UITapGestureRecognizer*) gesture;

122. if (tapGesture.numberOfTouchesRequired == 2 && tapGesture.numberOfTapsRequired == 1) {

123. [recognizer requireGestureRecognizerToFail:tapGesture];

124. }

125. }

126. }

127.}

128.

129.@end

130.

131.#endif