OC 触摸事件

下面是View与手势互动的方法

当然也能像手机的图库内样实现相片缩放和放大的功能

只需要在imageView上加上

      self.myimabeView.userInteractionEnabled = YES;

这样就能实现下面的效果了

 UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sigleTapAction:)];    [self.view addGestureRecognizer:singleTap];        //双击    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTapAction:)];    doubleTap.numberOfTapsRequired = 2;    [self.view addGestureRecognizer:doubleTap];    //单击要想执行必须双击失效    [singleTap requireGestureRecognizerToFail:doubleTap];        /**     *  长按     *     *  @return     */        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];    [self.targetView addGestureRecognizer:longPress];        /**     *  捏合手势     *     * UIPinchGestureRecognizer     */    UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];    [self.targetView addGestureRecognizer:pinchGesture];        /**     *  拖拽     *     *  UIPanGestureRecognizer     */        UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];    [self.targetView addGestureRecognizer:panGesture];        /**     *  旋转     *     *       */        UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationAction:)];    [self.targetView addGestureRecognizer:rotationGesture];    [pinchGesture requireGestureRecognizerToFail:rotationGesture];            UISwipeGestureRecognizer *leftSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipAction:)];    leftSwipeGesture.direction = UISwipeGestureRecognizerDirectionLeft;    [self.view addGestureRecognizer:leftSwipeGesture];    UISwipeGestureRecognizer *rightSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipAction:)];    rightSwipeGesture.direction = UISwipeGestureRecognizerDirectionRight;    [self.view addGestureRecognizer:rightSwipeGesture];    UISwipeGestureRecognizer *upSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipAction:)];    upSwipeGesture.direction = UISwipeGestureRecognizerDirectionUp;    [self.view addGestureRecognizer:upSwipeGesture];    UISwipeGestureRecognizer *downSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipAction:)];    downSwipeGesture.direction = UISwipeGestureRecognizerDirectionDown;    [self.view addGestureRecognizer:downSwipeGesture];}-(void)sigleTapAction:(UITapGestureRecognizer *)sender{        if (sender.view.backgroundColor == [UIColor whiteColor]) {        sender.view.backgroundColor = [UIColor blackColor];    }else{        sender.view.backgroundColor = [UIColor whiteColor];    }    }- (void)doubleTapAction:(UITapGestureRecognizer *)sender{        NSLog(@"双击");}- (void)longPressAction:(UILongPressGestureRecognizer *)sender{        if (sender.state == UIGestureRecognizerStateEnded) {        UIAlertController *alertController=[UIAlertController alertControllerWithTitle:@"标题" message:@"选择照片" preferredStyle:UIAlertControllerStyleActionSheet];        UIAlertAction *photoAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {            NSLog(@"调用照相机");        }];        [alertController addAction:photoAction];                UIAlertAction *libraryAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {            NSLog(@"调用本地相册");        }];        [alertController addAction:libraryAction];                UIAlertAction *cancleAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {            NSLog(@"取消");        }];        [alertController addAction:cancleAction];                [self presentViewController:alertController animated:YES completion:nil];    }        }-(void)pinchAction:(UIPinchGestureRecognizer *)sender{      sender.view.transform = CGAffineTransformMakeScale(sender.scale, sender.scale);}-(void)panAction:(UIPanGestureRecognizer *)sender{//    if (sender.state != UIGestureRecognizerStateEnded && sender.state != UIGestureRecognizerStateFailed) {//        CGPoint location = [sender locationInView:sender.view.superview];//        sender.view.center = location;//    }    //    CGPoint center = sender.view.center;//    CGPoint translation = [sender translationInView:self.view];//    sender.view.center = CGPointMake(center.x + translation.x, center.y + translation.y);//    [sender setTranslation:CGPointZero inView:self.view];            //视图前置操作    [sender.view.superview bringSubviewToFront:sender.view];       CGPoint center = sender.view.center;    CGFloat cornerRadius = sender.view.frame.size.width / 2;    CGPoint translation = [sender translationInView:self.view];    //NSLog(@"%@", NSStringFromCGPoint(translation));    sender.view.center = CGPointMake(center.x + translation.x, center.y + translation.y);    [sender setTranslation:CGPointZero inView:self.view];   //    if (sender.state == UIGestureRecognizerStateEnded) {//            //计算速度向量的长度，当他小于200时，滑行会很短//        CGPoint velocity = [sender velocityInView:self.view];//        CGFloat magnitude = sqrtf((velocity.x * velocity.x) + (velocity.y * velocity.y));//       CGFloat slideMult = magnitude / 200;//        //NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult); //e.g. 397.973175, slideMult: 1.989866//        //              //基于速度和速度因素计算一个终点//        float slideFactor = 0.1 * slideMult;//        CGPoint finalPoint = CGPointMake(center.x + (velocity.x * slideFactor),//                                                                                              center.y + (velocity.y * slideFactor));//        //限制最小［cornerRadius］和最大边界值［self.view.bounds.size.width - cornerRadius］，以免拖动出屏幕界限//        finalPoint.x = MIN(MAX(finalPoint.x, cornerRadius),//                                                                  self.view.bounds.size.width - cornerRadius);//        finalPoint.y = MIN(MAX(finalPoint.y, cornerRadius),//                                                                  self.view.bounds.size.height - cornerRadius);//        //                 //使用 UIView 动画使 view 滑行到终点//               [UIView animateWithDuration:slideFactor*2//                                                   delay:0//                                                 options:UIViewAnimationOptionCurveLinear//                                              animations:^{//                                                    sender.view.center = finalPoint;//                                                  }//                                             completion:nil]; //            }    }- (void)rotationAction:(UIRotationGestureRecognizer *)sender{    sender.view.transform = CGAffineTransformRotate(sender.view.transform, sender.rotation);    sender.rotation = 0.0;}-(void)swipAction:(UISwipeGestureRecognizer *)sender{    switch (sender.direction) {        case UISwipeGestureRecognizerDirectionRight:        {            CATransition *animation=[CATransition animation];            animation.delegate=self;            animation.duration=1.0f;            animation.timingFunction=UIViewAnimationCurveEaseInOut;            animation.type=kCATransitionMoveIn;            animation.subtype=kCATransitionFromLeft;            [sender.view.layer addAnimation:animation forKey:@"move in"];        }            break;        case UISwipeGestureRecognizerDirectionLeft:        {            NSLog(@"向左扫动了屏幕");                        CATransition *animation=[CATransition animation];            animation.delegate=self;            animation.duration=1.0f;            animation.timingFunction=UIViewAnimationCurveEaseInOut;            animation.type=kCATransitionMoveIn;            animation.subtype=kCATransitionFromRight;            [sender.view.layer addAnimation:animation forKey:@"move in"];        }            break;        case UISwipeGestureRecognizerDirectionUp:        {            CATransition *animation=[CATransition animation];            animation.delegate=self;            animation.duration=1.0f;            animation.timingFunction=UIViewAnimationCurveEaseInOut;            animation.type=kCATransitionMoveIn;            animation.subtype=kCATransitionFromBottom;            [sender.view.layer addAnimation:animation forKey:@"move in"];        }            break;        case UISwipeGestureRecognizerDirectionDown:        {            CATransition *animation=[CATransition animation];            animation.delegate=self;            animation.duration=1.0f;            animation.timingFunction=UIViewAnimationCurveEaseInOut;            animation.type=kCATransitionMoveIn;            animation.subtype=kCATransitionFromTop;            [sender.view.layer addAnimation:animation forKey:@"move in"];        }            break;                    default:            break;    }}