UIImageView子类不能同时使用手势
UIImageView子类不能同时使用手势
提问于 2012-10-24 21:59:27
我正在为iPad开发一个iOS6应用程序。我已经开发了一个添加手势识别(缩放、收缩和平移)的UIImageView子类，但我有一个问题:它不能同时支持手势识别。我最初将它作为一个普通的UIImageView编写，它工作得很好，但现在使用子类就不行了。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;}ViewControler.m(我从image创建了一个imageview，它不会同时响应多个手势)
image *img = [[image alloc] initWithImage:imatgetemporal];
img.center = CGPointMake(525/2, 651/2);
[[self.view viewWithTag:2] addSubview:img];感谢大家！！
回答 1
Stack Overflow用户
回答已采纳
发布于 2013-02-19 05:09:54
我猜你可以通过在声明了UIPanGestureRecognizer、UIPinchGestureRecognizer、UIRotationGestureRecognizer和UITapGestureRecognizer之后添加相同的委托来解决它们。代码将如下所示：
tapRecognizer.delegate = self;
pinchRecognizer.delegate = self;
rotationRecognizer.delegate = self;
tapRecognizer.delegate = self;希望能有所帮助。
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原文链接：
https://stackoverflow.com/questions/13050837
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