縮放，旋轉和拖動UIImageView

-(void)scale:(id)sender { 

[self.view bringSubviewToFront:[(UIPinchGestureRecognizer*)sender view]]; 

if([(UIPinchGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) { 

    lastScale = 1.0; 
    return; 
} 

CGFloat scale = 1.0 - (lastScale - [(UIPinchGestureRecognizer*)sender scale]); 

CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform; 
CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, scale, scale); 

[[(UIPinchGestureRecognizer*)sender view] setTransform:newTransform]; 

lastScale = [(UIPinchGestureRecognizer*)sender scale]; 
} 

-(void)rotate:(id)sender { 

[self.view bringSubviewToFront:[(UIRotationGestureRecognizer*)sender view]]; 

if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) { 

    lastRotation = 0.0; 
    return; 
} 

CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)sender rotation]); 

CGAffineTransform currentTransform = [(UIPinchGestureRecognizer*)sender view].transform; 
CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation); 

[[(UIRotationGestureRecognizer*)sender view] setTransform:newTransform]; 

lastRotation = [(UIRotationGestureRecognizer*)sender rotation]; 
} 

-(void)move:(id)sender { 

[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations]; 

[self.view bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]]; 
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view]; 

if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) { 

    firstX = [[sender view] center].x; 
    firstY = [[sender view] center].y; 
} 

translatedPoint = CGPointMake(firstX+translatedPoint.x, firstY+translatedPoint.y); 

[[sender view] setCenter:translatedPoint]; 

if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) { 

    CGFloat finalX = translatedPoint.x + (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].x); 
    CGFloat finalY = translatedPoint.y + (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].y); 

    if(UIDeviceOrientationIsPortrait([[UIDevice currentDevice] orientation])) { 

     if(finalX < 0) {        finalX = 0;    }      else if(finalX > 768) { 

      finalX = 768; 
     } 

     if(finalY < 0) {        finalY = 0;    }      else if(finalY > 1024) { 

      finalY = 1024; 
     } 
    } 

    else { 

     if(finalX < 0) {        finalX = 0;    }      else if(finalX > 1024) { 

      finalX = 768; 
     } 

     if(finalY < 0) {        finalY = 0;    }      else if(finalY > 768) { 

      finalY = 1024; 
     } 
    } 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:.35]; 
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; 
    [[sender view] setCenter:CGPointMake(finalX, finalY)]; 
    [UIView commitAnimations]; 
} 
} 

-(void)tapped:(id)sender { 

[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations]; 
} 

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer  shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { 

return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]; 
}

這是我的代碼，我想移動的UIImageView被稱爲「小鳥」。我知道我必須創建一個 - （void）Birdie UIImageView識別器，但是我使用了以下不起作用的內容。縮放，旋轉和拖動UIImageView

UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)]; 
[pinchRecognizer setDelegate:self]; 
[Birdie addGestureRecognizer:pinchRecognizer]; 

UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)]; 
[rotationRecognizer setDelegate:self]; 
[Birdie addGestureRecognizer:rotationRecognizer]; 

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)]; 
[panRecognizer setMinimumNumberOfTouches:1]; 
[panRecognizer setMaximumNumberOfTouches:1]; 
[panRecognizer setDelegate:self]; 
[Birdie addGestureRecognizer:panRecognizer]; 

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)]; 
[tapRecognizer setNumberOfTapsRequired:1]; 
[tapRecognizer setDelegate:self]; 
[Birdie addGestureRecognizer:tapRecognizer]; 

[self.view addSubview:Birdie]; 
}

非常感謝先進！

來源

2011-04-15 Tim

我參考你對這篇文章的回答[1] [1]：http://stackoverflow.com/questions/5822214/drag-scale-and-rotate-multiple-uiimageviews/9562907#9562907 希望它能幫助:) – 2012-03-05 07:35:40

我是指你回答這個訊息[拖動，縮放和旋轉的單個或多個的UIImageViews] [1] [1]：http://stackoverflow.com/questions/5822214/drag-scale-and-rotate-multiple-uiimageviews/9562907 ＃9562907 :) – 2012-03-05 07:36:50

-1

你需要把一些值在界面中，是這樣的：

//Zoom 
CGFloat lastScaleFactor; 

//Movement 
CGPoint startLocation; 
float distance; 

//Rotation 
CGFloat valore;

然後：

- (void)zoomAction:(UIGestureRecognizer *)sender { 

    CGFloat factor = [(UIPinchGestureRecognizer *)sender scale]; 
    if (factor > 1) { 

     self.yourImage.transform = CGAffineTransformMakeScale(lastScaleFactor + (factor-1), lastScaleFactor + (factor-1)); 

    } else { 

     self.yourImage.transform = CGAffineTransformMakeScale(lastScaleFactor * factor, lastScaleFactor * factor); 

    } 

    //Save the new "scale" factor 
    if (sender.state == UIGestureRecognizerStateEnded) { 
     if (factor > 1) { 
      lastScaleFactor += (factor-1); 
     } else { 
      lastScaleFactor *= factor; 
     } 
    } 
} 
- (void)panAction:(UIPanGestureRecognizer *)gesture { 
    if ((gesture.state == UIGestureRecognizerStateChanged) || (gesture.state == UIGestureRecognizerStateEnded)) { 

     CGPoint location = [gesture locationInView:self.view]; 

     [self.yourImage setCenter:location]; 
    } 
} 

- (void)rotationAction:(UIRotationGestureRecognizer *)gesture { 
    if (gesture.state == UIGestureRecognizerStateBegan) { 
     [gesture setRotation:valore * 10]; 
    } 
    if (gesture.state == UIGestureRecognizerStateChanged) { 
     valore = gesture.rotation/10; 
     if (valore > 1.0) valore = 1.0; 
     if (valore < 0.2) valore = 0.2; 

     self.yourImage.alpha = valore; 
    } 
    NSLog(@"rotazione %f", gesture.rotation/10); 
}

在這種情況下，我使用的旋轉改變字母，但你可以做你需要什麼

來源

2011-09-02 09:28:23 Enlil

縮放，旋轉和拖動UIImageView

回答

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