????1??UIGestureRecognizer ????
????????????? iOS ?з???????????????????????豸??????????
????iOS ???? 3.2 ??????????Щ??????????UIGestureRecognizer ???????????????????????????????????????
????UIPanGestureRecognizer???????
????UIPinchGestureRecognizer??????
????UIRotationGestureRecognizer???????
????UITapGestureRecognizer??????
????UILongPressGestureRecognizer????????
????UISwipeGestureRecognizer???????
?????????????????? UIGestureRecognizer ????????????????????????????
????PS????????????????? #import <UIKit/UIGestureRecognizerSubclass.h>?????????????·?????
????1 - (void)reset;
????2
????3 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
????4 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
????5 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
????6 - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;
????7 //???????????? UIGestureRecognizer (UIGestureRecognizerProtected) ???????????????????????в?
????UIGestureRecognizer ???й?????￡?

????2????????
??????????????????У??????????????????????????? UITapGestureRecognizer??
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????1 typedef NS_ENUM(NSInteger?? UIGestureRecognizerState) {
????2     UIGestureRecognizerStatePossible??   // ??δ???????????????????????????????????????????????
????3     UIGestureRecognizerStateBegan??      // ???????????????????????????????????п???????仯???????????δ???
????4     UIGestureRecognizerStateChanged??    // ?????????????
????5     UIGestureRecognizerStateEnded??      // ????????????????????????????
????6     UIGestureRecognizerStateCancelled??  // ????????????????????
????7     UIGestureRecognizerStateFailed??     // ?????????????????????
????8     UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded // ????????????UIGestureRecognizerStateEnded
????9 };
????????????????? UITapGestureRecgnizer ???????????????????????????????1?????????????????????????β???????????????????????????????????ò???????????????3??????????
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??????????????? View ?С??????????????? View????????????? View ????????????????????????????????л????????
????PS????????????????? View????????? View ?????ж???????????????????????Щ????????????????????????????????????Ч??????????????????????????????????? option ??????????????????????
????4?????????
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?????????????????? UIImageView ???С?????????????????????????????????
????????????????????????? KMGestureRecognizer???????????? UIView ?С?
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????KMGestureRecognizer.h
????1 #import <UIKit/UIKit.h>
????2
????3 typedef NS_ENUM(NSUInteger?? Direction) {
????4     DirectionUnknown??
????5     DirectionLeft??
????6     DirectionRight
????7 };
????8
????9 @interface KMGestureRecognizer : UIGestureRecognizer
????10 @property (assign?? nonatomic) NSUInteger tickleCount; //????????
????11 @property (assign?? nonatomic) CGPoint currentTickleStart; //??????????????λ??
????12 @property (assign?? nonatomic) Direction lastDirection; //?????????????
????13
????14 @end
????KMGestureRecognizer.m
????1 #import "KMGestureRecognizer.h"
????2 #import <UIKit/UIGestureRecognizerSubclass.h>
????3
????4 @implementation KMGestureRecognizer
????5 #define kMinTickleSpacing 20.0
????6 #define kMaxTickleCount 3
????7
????8 - (void)reset {
????9     _tickleCount = 0;
????10     _currentTickleStart = CGPointZero;
????11     _lastDirection = DirectionUnknown;
????12    
????13     if (self.state == UIGestureRecognizerStatePossible) {
????14         self.state = UIGestureRecognizerStateFailed;
????15     }
????16 }
????17
????18 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
????19     UITouch *touch = [touches anyObject];
????20     _currentTickleStart = [touch locationInView:self.view]; //?????????????????λ??
????21 }
????22
????23 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
????24     //????????????????λ?á?????????????λ?á????? X ?????????????????????????
????25     UITouch *touch = [touches anyObject];
????26     CGPoint tickleEnd = [touch locationInView:self.view];
????27     CGFloat tickleSpacing = tickleEnd.x - _currentTickleStart.x;
????28     Direction currentDirection = tickleSpacing < 0 ? DirectionLeft : DirectionRight;
????29    
????30     //????? X ??????????????????
????31     if (ABS(tickleSpacing) >= kMinTickleSpacing) {
????32         //?ж?????????β????????????????????????????????л??????
????33         if (_lastDirection == DirectionUnknown ||
????34             (_lastDirection == DirectionLeft && currentDirection == DirectionRight) ||
????35             (_lastDirection == DirectionRight && currentDirection == DirectionLeft)) {
????36             _tickleCount++;
????37             _currentTickleStart = tickleEnd;
????38             _lastDirection = currentDirection;
????39            
????40             if (_tickleCount >= kMaxTickleCount && self.state == UIGestureRecognizerStatePossible) {
????41                 self.state = UIGestureRecognizerStateEnded;
????42                 //NSLog(@"?????????????????л??????");
????43             }
????44         }
????45     }
????46 }
????47
????48 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
????49     [self reset];
????50 }
????51
????52 - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
????53     [self reset];
????54 }
????55
????56 @end
????ViewController.h
????1 #import <UIKit/UIKit.h>
????2 #import "KMGestureRecognizer.h"
????3
????4 @interface ViewController : UIViewController
????5 @property (strong?? nonatomic) UIImageView *imgV;
????6 @property (strong?? nonatomic) UIImageView *imgV2;
????7 @property (strong?? nonatomic) KMGestureRecognizer *customGestureRecognizer;
????8
????9 @end
????ViewController.m
????1 #import "ViewController.h"
????2
????3 @interface ViewController ()
????4 - (void)handlePan:(UIPanGestureRecognizer *)recognizer;
????5 - (void)handlePinch:(UIPinchGestureRecognizer *)recognizer;
????6 - (void)handleRotation:(UIRotationGestureRecognizer *)recognizer;
????7 - (void)handleTap:(UITapGestureRecognizer *)recognizer;
????8 - (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer;
????9 - (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer;
????10 - (void)handleCustomGestureRecognizer:(KMGestureRecognizer *)recognizer;
????11
????12 - (void)bindPan:(UIImageView *)imgVCustom;
????13 - (void)bindPinch:(UIImageView *)imgVCustom;
????14 - (void)bindRotation:(UIImageView *)imgVCustom;
????15 - (void)bindTap:(UIImageView *)imgVCustom;
????16 - (void)bindLongPress:(UIImageView *)imgVCustom;
????17 - (void)bindSwipe;
????18 - (void)bingCustomGestureRecognizer;
????19 - (void)layoutUI;
????20 @end
????21
????22 @implementation ViewController
????23
????24 - (void)viewDidLoad {
????25     [super viewDidLoad];
????26    
????27     [self layoutUI];
????28 }
????29