IOS --- UIView add Click Event

IOS's view does not have the click function, which is a big difference with Android. There is no way to customize it. I originally wanted to write it myself. I visited github and found that some of my colleagues have already written it, I don't need to repeat it either. Here we just record it:
Here we have defined the Category for UIViuew, as follows:
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