手势UIGestureRecognizer

• 轻击 UITapGestureRecognizer
• 长按 UILongPressGestureRecognizer
• 轻扫 UISwipeGestureRecognizer

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //轻击
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImage)];
    tap.delegate = self;
    [self.imageView addGestureRecognizer:tap];
    
    
    //长按
    UILongPressGestureRecognizer *lPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
    [self.imageView addGestureRecognizer:lPress];
    
    
    //轻扫
    UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.imageView addGestureRecognizer:leftSwipe];
    
    UISwipeGestureRecognizer *rightSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
    [self.imageView addGestureRecognizer:rightSwipe];
    
    UISwipeGestureRecognizer *upSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    upSwipe.direction = UISwipeGestureRecognizerDirectionUp;
    [self.imageView addGestureRecognizer:upSwipe];
    
    UISwipeGestureRecognizer *downSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    downSwipe.direction = UISwipeGestureRecognizerDirectionDown;
    [self.imageView addGestureRecognizer:downSwipe];
}


//轻击
-(void)tapImage{
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        //layer层的3D变换
        //self.imageView.layer.transform = CATransform3DMakeRotation(M_PI, 1, 1, 0);
        self.imageView.layer.transform = CATransform3DRotate(self.imageView.layer.transform, M_PI, 0, 0, 0);
        //imageView的2D变换
        if (imageWidth < screenWidth) {
            self.imageView.transform = CGAffineTransformScale(self.imageView.transform, screenWidth/imageWidth, screenWidth/imageWidth);
        }else{
            self.imageView.transform = CGAffineTransformScale(self.imageView.transform, 180/imageWidth, 180/imageWidth);
        }
    } completion:nil];
}

//轻击代理
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
    CGPoint point = [touch locationInView:self.imageView];
    if (point.x > 180*0.5) {
        return YES;
    }else{
        return NO;
    }
}


//长按
-(void)longPress:(UILongPressGestureRecognizer *)longP{
    if(longP.state==UIGestureRecognizerStateBegan){ //开始长按
        [UIView animateWithDuration:0.1 delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
            self.imageView.transform = CGAffineTransformMakeScale(screenWidth/imageWidth, screenWidth/imageWidth);
        } completion:^(BOOL finished) {}];
    }else if (longP.state==UIGestureRecognizerStateChanged){ //开始移动
        
    }else if (longP.state==UIGestureRecognizerStateEnded){ //结束长按
        self.imageView.transform = CGAffineTransformMakeScale(1, 1);
    }
}


-(void)swipe:(UISwipeGestureRecognizer *)swipe{
    if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) { //左扫
        NSLog(@"左扫");
    } else if(swipe.direction == UISwipeGestureRecognizerDirectionRight){ //右扫
        NSLog(@"右扫");
    } else if(swipe.direction == UISwipeGestureRecognizerDirectionUp){
        NSLog(@"上扫");
    } else if(swipe.direction == UISwipeGestureRecognizerDirectionDown){
        NSLog(@"下扫");
    }
}

@end

• 拖动 UIPanGestureRecognizer
• 缩放 UIPinchGestureRecognizer
• 旋转 UIRotationGestureRecognizer

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.imageView.userInteractionEnabled = YES;
    
    //拖动
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [self.imageView addGestureRecognizer:pan];
    
    
    //缩放
    UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
    pinch.delegate = self;
    [self.imageView addGestureRecognizer:pinch];
    
    
    
    //旋转
    UIRotationGestureRecognizer * rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
    rotation.delegate = self;
    [self.imageView addGestureRecognizer:rotation];
}


-(void)pan:(UIPanGestureRecognizer *)pan{
    CGPoint point = [pan translationInView:self.imageView];
    //self.imageView.transform = CGAffineTransformMakeTranslation(point.x, point.y);
    self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, point.x, point.y);
    [pan setTranslation:CGPointZero inView:self.imageView]; //将imageView的translation以当前点作为零点
}



-(void)pinch:(UIPinchGestureRecognizer *)pinch{
    //self.imageView.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);
    self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);
    [pinch setScale:1];
}



-(void)rotation:(UIRotationGestureRecognizer *)rotation{
    //self.imageView.transform = CGAffineTransformMakeRotation(rotation.rotation);
    self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotation.rotation);
    [rotation setRotation:0];
}


//UIGestureRecognizerDelegate: shouldRecognizeSimultaneously
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}

@end