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我正在为 iPad 开发 iOs 6 应用程序。我开发了一个 UIImageView 子类，添加了手势识别（缩放、捏合和平移），但我有一个问题：它不能同时接受手势。我首先将它编码为普通的 UIImageView，它工作得很好，但现在它没有子类。我的代码：

image.m（UIImageView 子类）

- (id)initWithImage:(UIImage *)image {
self = [super initWithImage:image];

if (self) {

    [self setMultipleTouchEnabled:YES];
    [self setUserInteractionEnabled:YES];

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panDetected:)];
    [super addGestureRecognizer:panRecognizer];

    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchDetected:)];
    [super addGestureRecognizer:pinchRecognizer];

    UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationDetected:)];
    [super addGestureRecognizer:rotationRecognizer];

    UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected:)];
    tapRecognizer.numberOfTapsRequired = 2;
    [super addGestureRecognizer:tapRecognizer];

    NSLog(@"lkjlkj");
}
return self;}

- (void)panDetected:(UIPanGestureRecognizer *)panRecognizer {
CGPoint translation = [panRecognizer translationInView:self.superview];
CGPoint imageViewPosition = self.center;
imageViewPosition.x += translation.x;
imageViewPosition.y += translation.y;

self.center = imageViewPosition;
[panRecognizer setTranslation:CGPointZero inView: self.superview];}

  - (void)pinchDetected:(UIPinchGestureRecognizer *)pinchRecognizer{    

CGFloat scale = pinchRecognizer.scale;
self.transform = CGAffineTransformScale(self.transform, scale, scale);
pinchRecognizer.scale = 1.0;}

- (void)rotationDetected:(UIRotationGestureRecognizer *)rotationRecognizer{
CGFloat angle = rotationRecognizer.rotation;
self.transform = CGAffineTransformRotate(self.transform, angle);
rotationRecognizer.rotation = 0.0;}

- (void)tapDetected:(UITapGestureRecognizer *)tapRecognizer{
[UIView animateWithDuration:0.25 animations:^{
    self.center = CGPointMake(CGRectGetMidX(self.superview.bounds), CGRectGetMidY(self.superview.bounds));
    self.transform = CGAffineTransformIdentity;
}];}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;}

viewcontroller.m（我从不同时响应多个手势的图像创建一个图像视图）

image *img = [[image alloc] initWithImage:imatgetemporal];    
img.center = CGPointMake(525/2, 651/2);


[[self.view viewWithTag:2] addSubview:img];

谢谢大家！！

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1 回答 1

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我想你可以通过在声明它们之后将相同的委托添加到UIPanGestureRecognizer,UIPinchGestureRecognizer和UIRotationGestureRecognizer来解决它。UITapGestureRecognizer代码将是这样的：

tapRecognizer.delegate = self;
pinchRecognizer.delegate = self;
rotationRecognizer.delegate = self;
tapRecognizer.delegate = self;

希望能帮助到你。

于 2013-02-18T21:09:54.277 回答