아이폰 풍경의 확대/축소 이미지의 크기를 고정하는 방법은 무엇입니까?

Question

pls는 주어진 이미지와 함께 다음 페이지에서 이미지의 입/출력을 고정하는 방법에 대한 논리를 제공합니다. width = 100 및 height = 150 이미지는 pintch in/out upto입니다. 해당 레벨을 수정하고 사용자가이 크기보다 크게 확대 된 다음 이미지가 그 너비, 높이로 고정되어 있으면 수정하십시오.

#import "PinchLibView.h" 
#import <QuartzCore/QuartzCore.h> 



    @implementation PinchLibView 

    @synthesize pinchImage; 
    @synthesize pinchScrlView; 
    @synthesize figureImageView; 
    @synthesize getWidth,getHeight; 



     -(void)initPinch{ 
      figureRect = self.frame; 
     contentView = [[UIView alloc]initWithFrame:CGRectMake(0,0, 
                    figureRect.size.width, 
                    figureRect.size.height)]; 
      pinchScrlView = [[CustomScrollView alloc]init]; 
      figureImageView = [[UIImageView alloc]init]; 
      pinchScrlView.minimumZoomScale =1.0; 
      pinchScrlView.maximumZoomScale = 4.0; 
      //NSLog(@"%d %d",appDelegate.width1,appDelegate.height1); 
      //getWidth=[appDelegate.width1 intValue]; 
      //getHeight=[appDelegate.height1 intValue]; 
      //NSLog(@"%d %d",getWidth,getHeight); 
     } 

     - (void)initScrollView{ 
      //figureImageView = [[UIImageView alloc]init]; 
      self.userInteractionEnabled = YES; 
      //figureImageView.image = pinchImage; 
      figureImageView.contentMode = UIViewContentModeScaleAspectFit; 

      pinchScrlView.frame = CGRectMake(0,0, 
              figureRect.size.width, 
              figureRect.size.height); 

      [pinchScrlView setResetFrame:figureRect]; 

      pinchScrlView.hidden = NO; 
      pinchScrlView.zoomScale = 1.0; 
      pinchScrlView.delegate = self; 
      pinchScrlView.showsHorizontalScrollIndicator = NO; 
      pinchScrlView.showsVerticalScrollIndicator = NO;  

      figureImageView.frame = CGRectMake(0,5, 
               figureRect.size.width,figureRect.size.height-10); 

      [contentView addSubview:figureImageView]; 
      [pinchScrlView addSubview:contentView]; 

      [self addSubview:pinchScrlView];  


      CATransition *animation = [CATransition animation]; 
      animation.duration = 0.3f; 
      animation.type = kCATransitionFade; 

      pinchScrlView.zoomScale = 1.0; 
      [pinchScrlView.layer addAnimation: animation forKey: nil]; 

      /*pinchScrlView.backgroundColor = [UIColor yellowColor]; 
      contentView.backgroundColor = [UIColor yellowColor]; 
      figureImageView.backgroundColor = [UIColor redColor];*/ 
      /*pinchScrlView.backgroundColor = [UIColor whiteColor]; 
      contentView.backgroundColor = [UIColor whiteColor]; 
      figureImageView.backgroundColor = [UIColor whiteColor]; */ 

     } 

     - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{ 
       return contentView; 
     } 


     - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale{ 

      /* Reset Image if scale in less than 1.0  */ 
      if(scale <= 1.0){ 

      UIEdgeInsets anEdgeInset = { 0, 0, 0, 0}; 
      pinchScrlView.contentInset = anEdgeInset; 

      pinchScrlView.scrlFlag = FALSE; 
      pinchScrlView.zoomScale = 0.0; 

      pinchScrlView.scrollEnabled = NO; 

      CATransition *animation = [ CATransition animation ]; 
      animation.duration = 0.3f; 
      animation.type = kCATransitionFade; 

      self.frame = figureRect; 
      pinchScrlView.frame = figureRect; 

      [self.layer addAnimation: animation forKey: nil ]; 
      [figureImageView.layer addAnimation: animation forKey: nil ]; 
      contentView.frame = figureRect; 
      pinchScrlView.contentSize = figureRect.size; 
      contentView.center = CGPointMake(self.frame.size.width/2, 
              self.frame.size.height/2); 
      pinchScrlView.center = CGPointMake(self.frame.size.width/2, 
               self.frame.size.height/2); 
     } 

     /* Make image centered if scale in greater than 1.0 */ 
     if(pinchScrlView.zoomScale > 1.0 && !pinchScrlView.scrlFlag){ 
      pinchScrlView.frame = self.superview.frame; 

      self.frame = self.superview.frame; 
      pinchScrlView.clipsToBounds = NO; 
      pinchScrlView.scrollEnabled = NO; 
      pinchScrlView.contentSize = pinchScrlView.frame.size; 
      pinchScrlView.scrlFlag = TRUE; 

      CGRect innerFrame = contentView.frame;////////// 
      CGRect scrollerBounds =pinchScrlView.bounds; 
      //CGRect scrollerBounds =CGRectMake(50,50,appDelegate.width1,appDelegate.height1); 
      if ((innerFrame.size.width < scrollerBounds.size.width) || (innerFrame.size.height < scrollerBounds.size.height)) 
      { 
       CGFloat tempx = contentView.center.x - (scrollerBounds.size.width/2); 
       CGFloat tempy = contentView.center.y - (scrollerBounds.size.height/2); 
       CGPoint myScrollViewOffset = CGPointMake(tempx, tempy); 

       pinchScrlView.contentOffset = myScrollViewOffset; 
      } 
      else if ((innerFrame.size.width > scrollerBounds.size.width) 
        || (innerFrame.size.height > scrollerBounds.size.height)){ 
       if(innerFrame.size.width > scrollerBounds.size.width){ 
        pinchScrlView.zoomScale = self.frame.size.width/figureRect.size.width; 
       }else if(innerFrame.size.height > scrollerBounds.size.height){ 
        pinchScrlView.zoomScale = self.frame.size.height/figureRect.size.height; 
       } 
       CGFloat tempx = contentView.center.x - (scrollerBounds.size.width/2); 
       CGFloat tempy = contentView.center.y - (scrollerBounds.size.height/2); 
       CGPoint myScrollViewOffset = CGPointMake(tempx, tempy); 
       pinchScrlView.contentOffset = myScrollViewOffset; 
      } 

      UIEdgeInsets anEdgeInset = { 0, 0, 0, 0}; 
      if(scrollerBounds.size.width > innerFrame.size.width) 
      { 
       anEdgeInset.left = (scrollerBounds.size.width - innerFrame.size.width)/2; 
       anEdgeInset.right = -anEdgeInset.left; 
      } 
      if(scrollerBounds.size.height > innerFrame.size.height) 
      { 
       anEdgeInset.top = (scrollerBounds.size.height - innerFrame.size.height)/2; 
       anEdgeInset.bottom = -anEdgeInset.top; 
      } 
      pinchScrlView.contentInset = anEdgeInset; 
     } 

     if(pinchScrlView.zoomScale > 1.0){ 
      CGRect innerFrame = contentView.frame; 

      CGRect scrollerBounds = pinchScrlView.bounds; 
      //CGRect scrollerBounds =CGRectMake(50,50,appDelegate.width1,appDelegate.height1); 

      if((innerFrame.size.width < scrollerBounds.size.width) 
       || (innerFrame.size.height < scrollerBounds.size.height)){ 

       CGFloat tempx = contentView.center.x - (scrollerBounds.size.width/2); 
       CGFloat tempy = contentView.center.y - (scrollerBounds.size.height/2); 
       CGPoint myScrollViewOffset = CGPointMake(tempx, tempy); 
       pinchScrlView.contentOffset = myScrollViewOffset; 
      } 
      else if((innerFrame.size.width > scrollerBounds.size.width) 
        || (innerFrame.size.height > scrollerBounds.size.height)){ 
       if(innerFrame.size.width > scrollerBounds.size.width){ 
        pinchScrlView.zoomScale = self.frame.size.width/figureRect.size.width; 
       }else if(innerFrame.size.height > scrollerBounds.size.height){ 
        pinchScrlView.zoomScale = self.frame.size.height/figureRect.size.height; 
       } 
       CGFloat tempx = contentView.center.x - (scrollerBounds.size.width/2); 
       CGFloat tempy = contentView.center.y - (scrollerBounds.size.height/2); 
       CGPoint myScrollViewOffset = CGPointMake(tempx, tempy); 
       pinchScrlView.contentOffset = myScrollViewOffset; 
      } 

      UIEdgeInsets anEdgeInset = { 0, 0, 0, 0}; 
      if (scrollerBounds.size.width > innerFrame.size.width){ 
       anEdgeInset.left = (scrollerBounds.size.width - innerFrame.size.width)/2; 
       anEdgeInset.right = -anEdgeInset.left; 
      } 
      if (scrollerBounds.size.height > innerFrame.size.height){ 
       anEdgeInset.top = (scrollerBounds.size.height - innerFrame.size.height)/2; 
       anEdgeInset.bottom = -anEdgeInset.top; 
      } 
      pinchScrlView.contentInset = anEdgeInset; 
      }  
     } 

     @end 

Answer 1

핀치 거리에 대해이 작업을 시도해보십시오

- (CGFloat) distanceBetweenTwoPoints : (CGPoint) fromPoint 포인트 - 투 - 포인트 : (CGPoint) 포인트 - 투 - 포인트 { 플로트 lengthX = fromPoint.x - toPoint.x; 부유 길이 Y = fromPoint.y - toPoint.Y; 반환 SQRT ((lengthX * lengthX) + (긴) 긴 *);}

는

- (무효) touchesBegan : (NSSet *)는 withEvent 접촉 : (UIEvent를 *) 이벤트 { // --- 당신은 알아낼 }

// --- 발사 할 때 사용자 [touch2PT : touch1PT 투 - 포인트 자체 distanceBetweenTwoPoints] 기록 originalDistance = touches-- 견인에 의해 만들어진 거리 - 방법은 두 tap-- //를 감지 --- 화면에 자신의 손가락을 (를) 이동 - (무효)가있는 touchesMoved : (NSSet *)는 withEvent 접촉 : (UIEvent를 *) 이벤트 {

 //---you figure out a way to detect double tap-- 
     //---double-touch--- 
     //---get info of first touch--- 
     UITouch *touch1 = [[allTouches allObjects] objectAtIndex:0]; 

     //---get info of second touch--- 
     UITouch *touch2 = [[allTouches allObjects] objectAtIndex:1]; 

     //---get the points touched--- 
     CGPoint touch1PT = [touch1 locationInView:[self view]]; 
     CGPoint touch2PT = [touch2 locationInView:[self view]]; 

     CGFloat currentDistance = [self distanceBetweenTwoPoints:touch1PT 
                 toPoint:touch2PT]; 

     //---zoom in--- 
     if (currentDistance > originalDistance) { 
      imageView.frame = CGRectMake(imageView.frame.origin.x - 2, 
             imageView.frame.origin.y - 2, 
             imageView.frame.size.width + 4, 
             imageView.frame.size.height + 4); 
     } 
     else { 
      //---zoom out--- 
      imageView.frame = CGRectMake(imageView.frame.origin.x + 2, 
             imageView.frame.origin.y + 2, 
             imageView.frame.size.width - 4, 
             imageView.frame.size.height - 4); 
     } 
     originalDistance = currentDistance;}