IOS手指控制图片的缩放

  

   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     

      // MoveScaleImageController.h
     
    
   

    

     

    
    

     

      // MoveScaleImage
     
    
   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     

      // Created by on 12-4-24.
     
    
   

    

     

    
    

     

      // Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
     
    
   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #import <UIKit/UIKit.h>
     
    
   

    

     

    
    

     

      #import "MoveScaleImageView.h"
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      @interface MoveScaleImageController : UIViewController<UIScrollViewDelegate>{
     
    
   

    

     

    
    

     

          UIScrollView *myScrollView;
     
    
   

    

     

    
    

     

          UIImageView *myImageView;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      @property(retain,nonatomic)UIScrollView *myScrollView;
     
    
   

    

     

    
    

     

      @property(retain,nonatomic)UIImageView *myImageView;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      @end
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     

      // MoveScaleImageController.m
     
    
   

    

     

    
    

     

      // MoveScaleImage
     
    
   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     

      // Created by on 12-4-24.
     
    
   

    

     

    
    

     

      // Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
     
    
   

    

     

    
    

     

      //
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #import "MoveScaleImageController.h"
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      @interface MoveScaleImageController ()
     
    
   

    

     

    
    

     

      
     
    
   

    

     

    
    

     

      @end
     
    
   

    

     

    
    

     

      
     
    
   

    

     

    
    

     

      @implementation MoveScaleImageController
     
    
   

    

     

    
    

     

      @synthesize myScrollView;
     
    
   

    

     

    
    

     

      @synthesize myImageView;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      -(void)dealloc{
     
    
   

    

     

    
    

     

          [myScrollView release];
     
    
   

    

     

    
    

     

          [myImageView release];
     
    
   

    

     

    
    

     

          [super dealloc];
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      -(void)loadView{
     
    
   

    

     

    
    

     

          [super loadView];
     
    
   

    

     

    
    

     

          self.view.backgroundColor = [UIColor lightGrayColor];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

      // UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
     
    
   

    

     

    
    

     

          UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(110, 200, 100, 50)];
     
    
   

    

     

    
    

     

      // [btn setFrame:CGRectMake(110, 200, 100, 40)];
     
    
   

    

     

    
    

     

          [btn setBackgroundColor:[UIColor whiteColor]];
     
    
   

    

     

    
    

     

          [btn setTitle:@"点击查看图片" forState:UIControlStateNormal];
     
    
   

    

     

    
    

     

          [btn.titleLabel setFont:[UIFont systemFontOfSize:13]];
     
    
   

    

     

    
    

     

          [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
     
    
   

    

     

    
    

     

          [btn addTarget:self action:@selector(clickEvent:) forControlEvents:UIControlEventTouchUpInside];
     
    
   

    

     

    
    

     

          [self.view addSubview:btn];
     
    
   

    

     

    
    

     

          [btn release];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     
    //下面是我要剪切区域的覆盖层
     
    
   

    

     

    
    

     

      // if(self.centerOverLayView==nil)
     
    
   

    

     

    
    

     

      // {
     
    
   

    

     

    
    

     

      // UIView *centerView=[[UIView alloc] initWithFrame:CGRectMake(20, 100, 280, 210)];
     
    
   

    

     

    
    

     

      // self.centerOverLayView=centerView;
     
    
   

    

     

    
    

     

      // [centerView release];
     
    
   

    

     

    
    

     

      // }
     
    
   

    

     

    
    

     

      // self.centerOverLayView.backgroundColor=[UIColor clearColor];
     
    
   

    

     

    
    

     

      // self.centerOverLayView.layer.borderColor=[UIColor orangeColor].CGColor;
     
    
   

    

     

    
    

     

      // self.centerOverLayView.layer.borderWidth=2.0;
     
    
   

    

     

    
    

     

      // [self.view addSubview:self.centerOverLayView];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      -(void)clickEvent:(id)sender{
     
    
   

    

     

    
    

     
    NSLog(@"***********clickeventad");
     
    
   

    

     

    
    

     

          myScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
     
    
   

    

     

    
    

     
    if(self.myScrollView==nil)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              UIScrollView *scrollView=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
     
    
   

    

     

    
    

     

              self.myScrollView=scrollView;
     
    
   

    

     

    
    

     

              [scrollView release];
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          self.myScrollView.backgroundColor=[UIColor blueColor];
     
    
   

    

     

    
    

     

          self.myScrollView.delegate=self;
     
    
   

    

     

    
    

     

          self.myScrollView.multipleTouchEnabled=YES;
     
    
   

    

     

    
    

     

          self.myScrollView.minimumZoomScale=1.0;
     
    
   

    

     

    
    

     

          self.myScrollView.maximumZoomScale=10.0;
     
    
   

    

     

    
    

     

          [self.view addSubview:self.myScrollView];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          UIImage *_image = [UIImage imageNamed:@"image.jpg"];
     
    
   

    

     

    
    

     

          CGFloat imageView_X = (_image.size.width > self.view.frame.size.width) ? self.view.frame.size.width : _image.size.width;
     
    
   

    

     

    
    

     

          CGFloat imageView_Y;
     
    
   

    

     

    
    

     

          CGFloat origin;
     
    
   

    

     

    
    

     
    if(_image.size.width > self.view.frame.size.width){
     
    
   

    

     

    
    

     

              origin = self.view.frame.size.width/_image.size.width;
     
    
   

    

     

    
    

     

              imageView_Y = _image.size.height*origin;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          myImageView = [[UIImageView alloc]initWithFrame:CGRectMake((self.view.frame.size.width-imageView_X)/2, (self.view.frame.size.height-imageView_Y)/2, imageView_X, imageView_Y)];
     
    
   

    

     

    
    

     
   
     
    
   

    

     

    
    

     
    if(self.myImageView==nil)
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              UIImageView *imageView=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
     
    
   

    

     

    
    

     

              self.myImageView=imageView;
     
    
   

    

     

    
    

     

              [imageView release];
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
   
     
    
   

    

     

    
    

     

      // [myImageView setImage:_image];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          UIImage *originImage=[[UIImage alloc]initWithCGImage:_image.CGImage];
     
    
   

    

     

    
    

     

          [myImageView setImage:originImage];
     
    
   

    

     

    
    

     

      // [myImageView setFrame:CGRectMake(0, 0, _image.size.width, _image.size.height)];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          [self.myScrollView addSubview:self.myImageView];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          UIButton *closeBtn = [[UIButton alloc]initWithFrame:CGRectMake(10, 10, 50, 50)];
     
    
   

    

     

    
    

     

          [closeBtn setBackgroundColor:[UIColor redColor]];
     
    
   

    

     

    
    

     

          [closeBtn setAlpha:0.5];
     
    
   

    

     

    
    

     

          [closeBtn addTarget:self action:@selector(closeEvent:) forControlEvents:UIControlEventTouchUpInside];
     
    
   

    

     

    
    

     

          [self.view addSubview:closeBtn];
     
    
   

    

     

    
    

     

          [closeBtn release];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

      // UIView *backView = [[UIView alloc] initWithFrame:CGRectInset(self.view.frame, 5, 5)];
     
    
   

    

     

    
    

     

      // backView.alpha = 0.5;
     
    
   

    

     

    
    

     

      // backView.backgroundColor = [UIColor blackColor];
     
    
   

    

     

    
    

     

          [self.view addSubview:backView];
     
    
   

    

     

    
    

     

      // 
     
    
   

    

     

    
    

     

      // UIImage* image=[UIImage imageNamed:@"image.jpg"];
     
    
   

    

     

    
    

     

      // MoveScaleImageView*fileContent = [[MoveScaleImageView alloc]initWithFrame:CGRectMake(0, 44, 320, 436)];
     
    
   

    

     

    
    

     

      // [fileContent setImage:image];
     
    
   

    

     

    
    

     

      // 
     
    
   

    

     

    
    

     

          [backView addSubview:fileContent];
     
    
   

    

     

    
    

     

      // [self.view addSubview:fileContent];
     
    
   

    

     

    
    

     

      // 
     
    
   

    

     

    
    

     

      // [backView release];
     
    
   

    

     

    
    

     

      // [fileContent release];
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      -(void)closeEvent:(id)sender{
     
    
   

    

     

    
    

     

          [self.myImageView setHidden:YES];
     
    
   

    

     

    
    

     

          [self.myScrollView setHidden:YES];
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #pragma mark UIScrollView delegate methods
     
    
   

    

     

    
    

     

      //实现图片的缩放
     
    
   

    

     

    
    

     

      -(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
     
    
   

    

     

    
    

     
    NSLog(@"**************viewForZoomingInScrollView");
     
    
   

    

     

    
    

     
    return self.myImageView;
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     

      //实现图片在素芳过程中居中
     
    
   

    

     

    
    

     

      - (void)scrollViewDidZoom:(UIScrollView *)scrollView
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          CGFloat offsetX = (scrollView.bounds.size.width > scrollView.contentSize.width)?(scrollView.bounds.size.width - scrollView.contentSize.width)/2 : 0.0;
     
    
   

    

     

    
    

     

          CGFloat offsetY = (scrollView.bounds.size.height > scrollView.contentSize.height)?(scrollView.bounds.size.height - scrollView.contentSize.height)/2 : 0.0;
     
    
   

    

     

    
    

     

          self.myImageView.center = CGPointMake(scrollView.contentSize.width/2 + offsetX,scrollView.contentSize.height/2 + offsetY);
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      - (void)viewDidLoad
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          [super viewDidLoad];
     
    
   

    

     

    
    

     

      // Do any additional setup after loading the view.
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      - (void)viewDidUnload
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          [super viewDidUnload];
     
    
   

    

     

    
    

     
    // Release any retained subviews of the main view.
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
     
    
   

    

     

    
    

     

      }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      @end
     
    
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/8448114