手势识别状态：
typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {
// 没有触摸事件发生，所有手势识别的默认状态
UIGestureRecognizerStatePossible,
// 一个手势已经开始但尚未改变或者完成时
UIGestureRecognizerStateBegan,
// 手势状态改变
UIGestureRecognizerStateChanged,
// 手势完成
UIGestureRecognizerStateEnded,
// 手势取消，恢复至Possible状态
UIGestureRecognizerStateCancelled,
// 手势失败，恢复至Possible状态
UIGestureRecognizerStateFailed,
// 识别到手势识别
UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded
};
需要同时支持多种手势时实现delegate方法，返回YES，可判断几种手势同时进行
// 该方法返回的BOOL值决定了view是否能够同时响应多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
NSLog(@"%@ - %@", gestureRecognizer.class, otherGestureRecognizer.class);
return YES;
}
1.点击识别器
// 创建点击手势识别器，并监听
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapTouch)];
// 设置手势识别器属性
// 点击几次响应
tap.numberOfTapsRequired = 2;
// 几个手指同时点击
tap.numberOfTouchesRequired = 2;
// 添加手势识别器
[self.uiimageView addGestureRecognizer:tap];
2.长按识别器
// 创建长按识别器，并监听
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LongPressTouch)];
// 设置属性
// 多长时间响应
longPress.minimumPressDuration = 5;
// 按下后事件响应之前允许手指移动偏移位
longPress.allowableMovement = 10;
// 添加识别器
[self.view1 addGestureRecognizer:longPress];
3.轻扫
// 支持的手势方向枚举类型
typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {
UISwipeGestureRecognizerDirectionRight = 1 << 0, // 向右
UISwipeGestureRecognizerDirectionLeft = 1 << 1, // 向左
UISwipeGestureRecognizerDirectionUp = 1 << 2, // 向上
UISwipeGestureRecognizerDirectionDown = 1 << 3 // 向下
};
// 创建轻扫识别器，并监听如果要同时使用多个方向，分别创建多个轻扫识别器
// 例：添加向左向右手势
// 向左
UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipehTouch)];
swipe.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view1 addGestureRecognizer:swipe];
// 向右
UISwipeGestureRecognizer *swipe2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipehTouch)];
swipe2.direction = UISwipeGestureRecognizerDirectionRight;
[self.view1 addGestureRecognizer:swipe2];
/**
* 旋转、捏合和拖拽注意点：当手指松开后会重置值，如果需要进行缩放旋转等操作，需在适当地方给返回的值赋值
*/
4.旋转
// 创建旋转识别器，并监听
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(RotationTouch:)];
[self.view1 addGestureRecognizer:rotation];
// 注意点
- (void)RotationTouch:(UIRotationGestureRecognizer *)routation
{
NSLog(@"旋转");
// 每次加上之前的角度
self.view1.transform = CGAffineTransformRotate(self.view1.transform, routation.rotation);
// 将旋转角度清0
routation.rotation = 0;
}
5.捏合
// 创建捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchTouch:)];
[self.view1 addGestureRecognizer:pinch];
// 注意点
- (void)pinchTouch:(UIPinchGestureRecognizer *)pinch
{
NSLog(@"捏合");
self.view1.transform = CGAffineTransformScale(self.view1.transform, pinch.scale, pinch.scale);
pinch.scale = 1.0;
}
6.拖拽
// 创建拖拽手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(PanTouch)];
[self.view1 addGestureRecognizer:pan];
// 注意点
- (void)PanTouch:(UIPanGestureRecognizer *)pan
{
// 获取移动的坐标
CGPoint point = [pan translationInView:pan.view];
NSLog(@"拖拽");
CGPoint temp = self.view1.center;
temp.x += point.x;
temp.y += point.y;
self.view1.center = temp;
// 必须加
[pan setTranslation:CGPointZero inView:pan.view];
}
DEMO 链接: http://pan.baidu.com/s/1qW3VmUg 密码: 9pqk