UITouch
1.UITouch *touch = [touches anyObject];//找到触摸事件
if([touch.view isKindOfClass:[UIImageView class]]){
CGPoint point = [touch locationInView:self.view];//找到点击事件在self.view里的坐标
CGFloat xMove = point.x - _recordPoint.x;
CGFloat yMove = point.y - _recordPoint.y;//计算运动轨迹
touch.view.center = CGPointMake(touch.view.center.x +xMove,touch.view.center.y + yMove);//根据运动轨迹移动到点击到的视图
_recordPoint = [touch locationInView:self.view];//每次移动以后都修改记录
2.根据点击的次数来监听
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
NSLog(@"====%ld",touch.tapCount);
//连续点击的次数
if ([touch.view isKindOfClass:[UIImageView class]]) {
if (touch.tapCount == 2) {
CGRect rect = touch.view.frame;
rect.origin.x -= 5;
rect.size.width += 10;
touch.view.frame = rect;
//修改frame
}
}
}
各种手势
1.点击手势(类似于btn的点击）
UITapGestureRecognizer *tapGR = [[UITapgestureRecognizer alloc] initWithTarget:self action:@selector(tapGR:)];
[view addGestureRecognizer:tapGR];
- (void)tapGR:(UITapGestureRecognizer *)tapGR
{
[self.view bringSubViewToFront:tapGR.view];//将手势对应的view移到最上层
}
2.移动手势
UIPanGestureRecognizer *panGR = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGR:)];
[view addGestureRecognizer:panGR];
1 - (void)panGR:(UIPanGestureRecognizer *)panGR
2 {
3 CGPoint translation = [panGR translationInView:self.view];
4 //获取手势移动的轨迹
5
6 panGR.view.center = CGPointMake(panGR.view.center.x + translation.x, panGR.view.center.y + translation.y);
7 //根据手势的轨迹移动view
8
9 [panGR setTranslation:CGPointZero inView:self.view];
10 //每次移动以后都清空手势记录的轨迹
11 }
3.捏合手势
UIPinchGestureRecognizer *pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGR:)];
[view addGestureRecognizer:pinchGR];
1 - (void)pinchGR:(UIPinchGestureRecognizer *)pinchGR
2 {
3 pinchGR.view.transform = CGAffineTransformScale(pinchGR.view.transform, pinchGR.scale, pinchGR.scale);
4 //让view随着手势的缩放而缩放
5
6 pinchGR.scale = 1;
7 //缩放以后需要还原手势中记录的倍数
8 }
4.旋转手势
UIRotationGestureRecognizer *rotationGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGR:)];
[view addGestureRecognizer:rotationGR];
1 - (void)rotationGR:(UIRotationGestureRecognizer *)rotationGR
2 {
3 rotationGR.view.transform = CGAffineTransformRotate(rotationGR.view.transform, rotationGR.rotation);
4 //让view随着手势的旋转而旋转
5
6 rotationGR.rotation = 0;
7 //旋转以后还原记录
8 }
5.长按手势
UILongPressGestureRecognizer *longGR = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longGR:)];
[view addGestureRecognizer:longGR];
1 - (void)longGR:(UILongPressGestureRecognizer *)longGR
2 {
3 NSLog(@"===%ld",longGR.state);
4 //打印手势的状态（开始响应，改变，结束响应）
5
6 if (longGR.state == UIGestureRecognizerStateBegan) {
7 //长按手势开始响应时触发
8
9 CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
10 //创建一个基础动画
11
12 basicAnimation.fromValue = [NSNumber numberWithFloat:0.5];
13 basicAnimation.toValue = @2;
14 //从哪里来，到哪里去
15
16 basicAnimation.autoreverses = YES;
17 //是否以动画方式返回
18
19 basicAnimation.duration = 0.1;
20 //单次动画时间
21
22 basicAnimation.repeatCount = 99;
23 //重复次数
24
25 [longGR.view.layer addAnimation:basicAnimation forKey:@"aa"];
26 //添加动画
27 }
28 }
6.轻扫手势（和移动手势有冲突）
UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGR:)];
//轻扫手势(和pan移动有冲突的)
swipeGR.direction = UISwipeGestureRecognizerDirectionUp;
//设置轻扫的方向
[view addGestureRecognizer:swipeGR];
如果想实现多个方向的轻扫手势，需要创建多个，然后设置不同的方向。。。。。
1 - (void)swipeGR:(UISwipeGestureRecognizer *)swipeGR
2 {
3 CGRect rect = swipeGR.view.frame;
4
5 //判断方向
6 if (swipeGR.direction == UISwipeGestureRecognizerDirectionUp) {
7 rect.origin.y -= 5;
8 rect.size.height += 5;
9 }
10
11 //& 按位与判断（这种用法只能是枚举值后面有1<<2这种位操作的）
12 if (swipeGR.direction & UISwipeGestureRecognizerDirectionLeft) {
13 rect.origin.x -= 5;
14 rect.size.width += 5;
15 }
16
17 swipeGR.view.frame = rect;
18 }