使UIPinchGestureRecognizer和UIRotationGestureRecognizer一起工作

我嘗試使用手勢縮放和旋轉UIImageView。我在互聯網上看到過幾個例子，我已經實現了它，但它不能一起工作。使UIPinchGestureRecognizer和UIRotationGestureRecognizer一起工作

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 

    imgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)]; 
    // imgView.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height); 
    imgView.image = [UIImage imageNamed:@"spotItInLondonIcon.png"]; 
    [imgView setContentMode:UIViewContentModeScaleAspectFit]; 
    [imgView setMultipleTouchEnabled:YES]; 
    [imgView setUserInteractionEnabled:YES]; 
    [self.view addSubview:imgView]; 

    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)]; 
    [imgView addGestureRecognizer:pinch]; 
    pinch.delegate = self; 

    UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)]; 
    [imgView addGestureRecognizer:rotate]; 
    rotate.delegate = self; 
} 
-(void)pinch: (UIPinchGestureRecognizer*)sender 
{ 
    CGFloat scale = sender.scale; 
    imgView.transform = CGAffineTransformScale(imgView.transform, scale, scale); 
    sender.scale = 1.0; 
    NSLog(@"pinch executed"); 
} 
-(void)rotation: (UIRotationGestureRecognizer*)rotationDetected 
{ 
    CGFloat angle = rotationDetected.rotation; 
    imgView.transform = CGAffineTransformRotate(imgView.transform, angle); 
    rotationDetected.rotation = 0.0; 
    NSLog(@"rotation executed"); 
}

然後我將委託添加到應用程序delegate.m的.h文件和方法，但仍然只有一個手勢在工作。

@interface ViewController : UIViewController <UIGestureRecognizerDelegate> 

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

有人可以幫我嗎？

來源

2012-12-15 repoguy

它始終是一樣的識別器嗎？你有沒有檢查他們兩個單獨工作？即只添加它們。 –

如果我將開始捏，那麼它會縮放圖像，但我不能捏和旋轉在同一時間。如果我將開始旋轉，然後嘗試在同一時間捏，然後再次只有旋轉的作品。 – repoguy

方法應用delegate.m ??你必須添加在您添加的姿勢，你的情況的類中的方法，viewcontroller.m

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

這種方法viewcontroller.m不在的appdelegate。 m

來源

2012-12-16 09:27:48

這就是解決方案！我不知道，該方法看起來應該在appDelegate中，但現在我知道我是我的壞人。謝謝你的答案。 – repoguy

很高興它爲你工作好運:) –

使UIPinchGestureRecognizer和UIRotationGestureRecognizer一起工作

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