ios目前支持6中手势识别。
- UITapGestureRecognizer ： 点击手势
- UIPinchGestureRecognizer ： 捏合手势
- UIPanGestureRecognizer ： 拖动手势
- UISwipeGestureRecognizer ： 滑动手势
- UIRotationGestureRecognizer ： 旋转手势
- UILongPressGestureRecognizer ： 长按手势
具体代码执行：
点击手势
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| UITapGestureRecognizer* recognizer;
recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapFrom:)];
recognizer.numberOfTapsRequired = 1; // 点击次数
recognizer.numberOfTouchesRequired = 1;//手指个数
[self.view addGestureRecognizer:recognizer];
- (void)handleTapFrom:(UITapGestureRecognizer *)recognizer
{
recognizer.view.tag//添加手势的视图的tag值
//处理点击事件
}
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捏合手势
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| //自己设置 imageview和image去
UIImageView *imageview;
UIImage *srcImage ;
//设置imageview允许用户交互，支持多点触碰
imageview.userInteractionEnabled = YES;
imageview.multipleTouchEnabled = YES;
UIPinchGestureRecognizer* recognizer;
recognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlepinFrom:)];
[imageview addGestureRecognizer:recognizer];
- (void)handlepinFrom:(UIPinchGestureRecognizer *)gesture
{
CGFloat currentScale;
CGFloat scale = gesture.scale;
// 如果捏合手势刚刚开始
if (gesture.state == UIGestureRecognizerStateBegan)
{
// 计算当前缩放比
currentScale = imageview.image.size.width / srcImage.size.width;
}
// 根据手势处理器的缩放比例计算图片缩放后的目标大小
CGSize targetSize = CGSizeMake(srcImage.size.width * scale * currentScale,
srcImage.size.height * scale * currentScale);
// 对图片进行缩放
imageview.image = [srcImage imageByScalingToSize:targetSize];
}
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拖动手势
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| //自己设置 imageview去
UIImageView *imageview;
//设置imageview允许用户交互，支持多点触碰
imageview.userInteractionEnabled = YES;
imageview.multipleTouchEnabled = YES;
UIPanGestureRecognizer* recognizer;
recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlepinFrom:)];
//最小手指数
recognizer.minimumNumberOfTouches = 1;
//最大手指数
recognizer.maximumNumberOfTouches = 1;
[imageview addGestureRecognizer:recognizer];
- (void)handlepinFrom:(UIPanGestureRecognizer *)gesture
{
//处理坐标
}
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滑动手势
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| //单独手势一个一个的添加
UISwipeGestureRecognizer *recognizer;
recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
[self.view addGestureRecognizer:recognizer];
recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];
[self.view addGestureRecognizer:recognizer];
recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];
[self.view addGestureRecognizer:recognizer];
recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];
[[self.view addGestureRecognizer:recognizer];
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{
if(recognizer.direction==UISwipeGestureRecognizerDirectionDown)
{
NSLog(@"swipe down");
//执行程序
}
if(recognizer.direction==UISwipeGestureRecognizerDirectionUp)
{
NSLog(@"swipe up");
//执行程序
}
if(recognizer.direction==UISwipeGestureRecognizerDirectionLeft)
{
NSLog(@"swipe left");
//执行程序
}
if(recognizer.direction==UISwipeGestureRecognizerDirectionRight)
{
NSLog(@"swipe right");
//执行程序
}
}
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旋转手势
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| UIImageView *imageview;
UIRotationGestureRecognizer *rotationGestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateView:)];
[imageview addGestureRecognizer:rotationGestureRecognizer];
- (void) rotateView:(UIRotationGestureRecognizer *)rotationGestureRecognizer
{
UIView *view = rotationGestureRecognizer.view;
if (rotationGestureRecognizer.state == UIGestureRecognizerStateBegan || rotationGestureRecognizer.state == UIGestureRecognizerStateChanged) {
view.transform = CGAffineTransformRotate(view.transform, rotationGestureRecognizer.rotation);
[rotationGestureRecognizer setRotation:0];
}
}
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长按手势
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| UIImageView *imageview;
UILongPressGestureRecognizer * longPressGr = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressToDo:)];
longPressGr.minimumPressDuration = 1.0;//最短时间
[imageview addGestureRecognizer:longPressGr];
- (void) longPressToDo:(UILongPressGestureRecognizer *)gnizer
{
//处理长按事件
}
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