iOS手势操作总结
手势操作种类
- UITapGestureRecognizer: 敲击，点击
- UILongPressGestureRecognizer: 长按
- UIPinchGestureRecognizer: 缩放
- UIRotationGestureRecognizer: 旋转
- UISwipeGestureRecongizer: 轻扫
- UIPanGestureRecognizer: 拖拽
手势操作的代理方法(UIGestureRecognizerDelegate)
手势可能发生的条件，返回NO可以阻止此手势的发生或者此手势不产生任何效果
|
1
|
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer; |
是否允许多个手势同时发生
|
1
2
3
|
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer; |
UITapGestureRecognier敲击，点击手势
- 设置属性numberOfTapsRequired可以指定需要几根手指才能触发事件
- numberOfTouchesRequired：可以设置需要敲击几次触发事件
|
1
2
3
4
5
6
7
8
9
10
11
12
|
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)]; // 设置代理 tap.delegate = self; // 设置点击次数触发手势事件 tap.numberOfTapsRequired = 1; // 设置需要点击的手指数 tap.numberOfTouchesRequired = 1; [self.image addGestureRecognizer:tap]; |
UILongPressGestureRecongnizer长按
- minimumPressDuration设置长按的最小间隔时间，也就是说按下开始和手指离开时的中间间隔，如果小于这个值则不会被认为是长按操作
- allowableMovement：长按过程中是否允许移动
|
1
2
3
4
5
6
7
8
9
10
11
12
|
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];// 代理longPress.delegate = self;// 设置最小间隔时间, 手指按下与离开间隔时间longPress.minimumPressDuration = 1.0;// 按下过程中允许移动的像素longPress.allowableMovement = 30;[self.image addGestureRecognizer:longPress]; |
UIPinchGestureRecognizer缩放手势
scale: 设置缩放比例，相对于原来大小
|
1
2
3
4
5
6
7
8
9
|
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)]; // 代理 pinch.delegate = self; // 设置缩放比例 pinch.scale = 1.2; [self.image addGestureRecognizer:pinch]; |
UIRotationGestureRecognizer旋转手势
rotation: 旋转弧度，要保证每次都在上一次位置开始旋转，而不是回归初始位置，必须要在动作方法里将此值清零
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
- (void)setupRotation{ UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)]; // 设置代理 rotation.delegate = self; [self.image addGestureRecognizer:rotation];}- (void)rotation:(UIRotationGestureRecognizer *)rotation{ // 旋转角度 CGFloat radian = rotation.rotation; self.image.transform = CGAffineTransformRotate(self.image.transform, radian); // 复位，保证每次都是在上一次位置开始转，而不是每次都回归初始位置再转 rotation.rotation = 0;} |
UISwipeGestureRecognizer轻扫, 手指按下然后在屏幕上滑动
轻扫分四个方向（上下左右），并且如果要在一个控件上同时添加一个以上的轻扫动作，必须对每个动作添加一个对象。也就是说每个方向的动作对应一个对象。
direction: 指定轻扫动作的方向
|
1
2
3
4
5
6
|
typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) { UISwipeGestureRecognizerDirectionRight = 1 << 0, // 从左向右 UISwipeGestureRecognizerDirectionLeft = 1 << 1, // 从右向左 UISwipeGestureRecognizerDirectionUp = 1 << 2, // 从下往上 UISwipeGestureRecognizerDirectionDown = 1 << 3 // 从上往下}; |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)]; // 设置代理 swipeUp.delegate = self; // 修改方向, 从下往上 swipeUp.direction = UISwipeGestureRecognizerDirectionUp; [self.image addGestureRecognizer:swipeUp]; // 添加其他方向手势 UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)]; // 修改方向, 从下往上 swipeDown.direction = UISwipeGestureRecognizerDirectionDown; [self.image addGestureRecognizer:swipeDown]; |
UIPanGestureRecognizer拖拽，按下拖动控件操作
注意点：手势的触摸点locationInView和手势的移动点translationInView是不一样的，前者是用locationInView取得是指手指在当前控件中的坐标，后者表示相对于父view的rect
|
1
2
3
4
5
6
|
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];// 设置代理pan.delegate = self;[self.image addGestureRecognizer:pan]; |
|
1
2
3
4
5
6
7
8
9
10
11
12
|
// 手势的触摸点// CGPoint p = [pan locationInView:self.image];// 手势的移动点(每次移动的位移点)CGPoint transP = [pan translationInView:self.image];NSLog(@"%f, %f", transP.x, transP.y);self.image.transform = CGAffineTransformTranslate(self.image.transform, transP.x, transP.y);// 复位[pan setTranslation:CGPointZero inView:self.image]; |
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
原文链接：http://blog.csdn.net/gccll/article/details/51675893
