uiscrollview 내부의 사진 확대 및 축소

Question

uiscrollview 내에서 여러 이미지로 확대/축소 기능이있는 imageview를 사용하고 싶습니다. scrollview 내부에서 scrollview를 시도했지만 문제를 해결할 수 없습니다. 사진간에 스크롤하고 확대/축소하려는 경우 그 사진들.

Answer 1

나는 당신이 겪고있는 간단한 Github 프로젝트를 만들었습니다. 여기에서 확인하십시오 : https://github.com/twomedia/TMImageZoom

제스처 상태 변경을 처리하는 클래스를 만들어이 작업을 수행했습니다. 그런 다음 UIImageView를 창에 만들고 크기를 원본 이미지보기로 이동하여 사용자가 imageView를 확대/축소하는 효과를 만듭니다. 위 링크의 작은 스 니펫은 다음과 같습니다.

-(void) gestureStateChanged:(id)gesture withZoomImageView:(UIImageView*)imageView { 

// Insure user is passing correct UIPinchGestureRecognizer class. 
if (![gesture isKindOfClass:[UIPinchGestureRecognizer class]]) { 
    NSLog(@"(TMImageZoom): Must be using a UIPinchGestureRecognizer, currently you're using a: %@",[gesture class]); 
    return; 
} 

UIPinchGestureRecognizer *theGesture = gesture; 

// Prevent animation issues if currently animating reset. 
if (isAnimatingReset) { 
    return; 
} 

// Reset zoom if state = UIGestureRecognizerStateEnded 
if (theGesture.state == UIGestureRecognizerStateEnded || theGesture.state == UIGestureRecognizerStateCancelled || theGesture.state == UIGestureRecognizerStateFailed) { 
    [self resetImageZoom]; 
} 

// Ignore other views trying to start zoom if already zooming with another view 
if (isHandlingGesture && hostImageView != imageView) { 
    NSLog(@"(TMImageZoom): 'gestureStateChanged:' ignored since this imageView isnt being tracked"); 
    return; 
} 

// Start handling gestures if state = UIGestureRecognizerStateBegan and not already handling gestures. 
if (!isHandlingGesture && theGesture.state == UIGestureRecognizerStateBegan) { 
    isHandlingGesture = YES; 

    // Set Host ImageView 
    hostImageView = imageView; 
    imageView.hidden = YES; 

    // Convert local point to window coordinates 
    CGPoint point = [imageView convertPoint:imageView.frame.origin toView:nil]; 
    startingRect = CGRectMake(point.x, point.y, imageView.frame.size.width, imageView.frame.size.height); 

    // Post Notification 
    [[NSNotificationCenter defaultCenter] postNotificationName:TMImageZoom_Started_Zoom_Notification object:nil]; 

    // Get current window and set starting vars 
    UIWindow *currentWindow = [UIApplication sharedApplication].keyWindow; 
    firstCenterPoint = [theGesture locationInView:currentWindow]; 

    // Init zoom ImageView 
    currentImageView = [[UIImageView alloc] initWithImage:imageView.image]; 
    currentImageView.contentMode = UIViewContentModeScaleAspectFill; 
    [currentImageView setFrame:startingRect]; 
    [currentWindow addSubview:currentImageView]; 
} 

// Reset if user removes a finger (Since center calculation would cause image to jump to finger as center. Maybe this could be improved later) 
if (theGesture.numberOfTouches < 2) { 
    [self resetImageZoom]; 
    return; 
} 

// Update scale & center 
if (theGesture.state == UIGestureRecognizerStateChanged) { 
    NSLog(@"gesture.scale = %f", theGesture.scale); 

    // Calculate new image scale. 
    CGFloat currentScale = currentImageView.frame.size.width/startingRect.size.width; 
    CGFloat newScale = currentScale * theGesture.scale; 
    [currentImageView setFrame:CGRectMake(currentImageView.frame.origin.x, currentImageView.frame.origin.y, startingRect.size.width*newScale, startingRect.size.height*newScale)]; 

    // Calculate new center 
    UIWindow *currentWindow = [UIApplication sharedApplication].keyWindow; 
    int centerXDif = firstCenterPoint.x-[theGesture locationInView:currentWindow].x; 
    int centerYDif = firstCenterPoint.y-[theGesture locationInView:currentWindow].y; 
    currentImageView.center = CGPointMake((startingRect.origin.x+(startingRect.size.width/2))-centerXDif, (startingRect.origin.y+(startingRect.size.height/2))-centerYDif); 

    // Reset gesture scale 
    theGesture.scale = 1; 
} 
} 

Answer 2

시도해보기 전에 시도해보십시오.

https://github.com/NYTimes/NYTPhotoViewer