六种手势如下:
[UIPinchGestureRecognizer]（捏合)
[UIRotationGestureRecognizer]（旋转）
([UISwipeGestureRecognizer]滑动，快速移动）
[UIPanGestureRecognizer]（平移，慢速移动）
[UILongPressGestureRecognizer]（长按）
以上六种只是常用的一些手势,在这里作此简述
创建图片对象
// 创建图片对象
UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];
// 设置图片内容
imageView.image = [UIImage imageNamed:@"自己图片名"];
// 设置图片居中
imageView.center = self.view.center;
// 设置用户交互
imageView.userInteractionEnabled = YES;
// 添加到视图上
[self.view addSubview:imageView];
UITapGestureRecognizer (点击手势)
//1.创建手势对象
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClick:)];
//2.手势相关的属性
//点击次数（默认1）
tapGesture.numberOfTapsRequired = 1;
//手指的个数（默认1）
tapGesture.numberOfTouchesRequired = 1;
//3.把手势与视图相关联
[imageView addGestureRecognizer:tapGesture];
// 点击事件
-(void)tapClick:(UITapGestureRecognizer *)tap{
NSLog(@"点击图片了");
}
UIPinchGestureRecognizer (捏合手势)
//捏合手势
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pichClick:)];
[imageView addGestureRecognizer:pinchGesture];
// 捏合事件
-(void)pichClick:(UIPinchGestureRecognizer *)pinch{
//缩放的系数
NSLog(@"%.2lf",pinch.scale);
//固定写法
pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
//重置缩放系数（否则系数会累加）
pinch.scale = 1.0;
}
UIRotationGestureRecognizer (旋转手势)
//旋转手势
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationClick:)];
[imageView addGestureRecognizer:rotationGesture];
-(void)rotationClick:(UIRotationGestureRecognizer *)rotation{
NSLog(@"qqq");
}
UISwipeGestureRecognizer (滑动手势)
// 滑动手势
UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeClick:)];
// 设置轻扫的方向
leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:leftSwipe];
UISwipeGestureRecognizer *rightSwipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeClick:)];
// 右扫
rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:rightSwipe];
// 滑动事件
-(void)swipeClick:(UISwipeGestureRecognizer *)swpie{
// 如果是左扫
if (swpie.direction == UISwipeGestureRecognizerDirectionLeft ) {
NSLog(@"左扫!");
}else{
NSLog(@"右扫!");
}
}
UIPanGestureRecognizer (平移手势)
//平移手势
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panClick:)];
[imageView addGestureRecognizer:panGesture];
// 平移事件
-(void)panClick:(UIPanGestureRecognizer *)pan{
NSLog(@"响应了。。。");
//通过pan手势，能够获取到pan.view在self.view上的偏移量
CGPoint point = [pan translationInView:self.view];
NSLog(@"x=%.2lf y=%.2lf",point.x,point.y);
//改变中心点坐标（原来的中心点+偏移量=当前的中心点）
CGPoint newCenter = CGPointMake(pan.view.center.x + point.x, pan.view.center.y + point.y);
// CGPointZero<==>CGPointMake(0,0)
//限制拖动范围
newCenter.y = MAX(pan.view.frame.size.height/2, newCenter.y);
newCenter.y = MIN(self.view.frame.size.height - pan.view.frame.size.height/2, newCenter.y);
newCenter.x = MAX(pan.view.frame.size.width/2, newCenter.x);
newCenter.x = MIN(self.view.frame.size.width - pan.view.frame.size.width/2, newCenter.x);
pan.view.center = newCenter;
//每次调用之后，需要重置手势的偏移量，否则偏移量会自动累加
[pan setTranslation:CGPointZero inView:self.view];
}
UILongPressGestureRecognizer (长按手势)
//长按手势
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressClick:)];
//用几个手指触屏，默认1
longPressGesture.numberOfTouchesRequired = 1;
//设置最短长按时间，单位为秒（默认0.5）
longPressGesture.minimumPressDuration = 1;
//设置手势识别期间所允许的手势可移动范围
longPressGesture.allowableMovement = 10;
[imageView addGestureRecognizer:longPressGesture];
// 长按事件
-(void)longPressClick:(UILongPressGestureRecognizer *)press{
//state属性是所有手势父类提供的方法，用于记录手势的状态
if(press.state == UIGestureRecognizerStateBegan){
NSLog(@"长按手势开始响应!");
}else if (press.state == UIGestureRecognizerStateChanged){
NSLog(@"长按手势状态发生改变!");
}else{
NSLog(@"长按手势结束!");
}
}
