这个是调用图像缩放代码片段，通过[self zoomImageButtonPressed : image];调用缩放图片函数就可以了。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellIdentifier = @"imageValueCell"; ImageCell *imageCell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; if (!imageCell) { imageCell = [[ImageCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier capacity:2 type:ImageCellTypeUneditable]; } __weak typeof(self)weakSelf = self; imageCell.addImageAction = ^(ImageControl *control ,NSInteger count) { weakSelf.selectedControl = control; weakSelf.imageCount ++; [weakSelf addImage]; }; imageCell.showImageAction = ^(UIImage *image) { [self zoomImageButtonPressed : image]; }; imageCell.deleteImageAction = ^(ImageControl *control ,UIImage *image) { //do something maybe self.imageCount --; NSMutableArray *imageArray = [self.images mutableCopy]; for (UIImage *subImage in imageArray) { if (subImage == image) { [self.images removeObject:subImage]; } } }; cell = imageCell; return cell; }
具体的缩放图片页面调用逻辑很简单就没有必要再抽象了。
- (void)zoomImageButtonPressed : (UIImage *)image
{
if (!image)
{
return;
}
else
{
NSString *aString = @”CExpandPicViewController”;
CExpandPicViewController *expandPicViewController = [[CExpandPicViewController alloc] initWithNibName:aString bundle:nil]; expandPicViewController.image = image; [self presentViewController:expandPicViewController animated:NO completion:nil]; }
}
CExpandPicViewController.h文件的代码：
#import <UIKit/UIKit.h> @interface CExpandPicViewController : UIViewController<UIScrollViewDelegate>{ } @property (nonatomic, strong) IBOutlet UIImageView *imageViewBackground; @property (nonatomic, strong) IBOutlet UIImageView *imageViewExpandPic; @property (nonatomic, strong) IBOutlet UIImage *image; @end
CExpandPicViewController.m文件的代码：
#import "CExpandPicViewController.h" @interface CExpandPicViewController () <UIScrollViewDelegate> @property (nonatomic, assign) float imageWith; @property (nonatomic, assign) float imageHeight; @property(retain,nonatomic)UIScrollView *scrollerView; @property(retain,nonatomic)UIImageView *imageView; @property(retain,nonatomic)UIImageView *imageViewBG; @end @implementation CExpandPicViewController - (void)viewDidLoad { [super viewDidLoad]; [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:NO]; // Do any additional setup after loading the view from its nib. if(_image == nil) { return; } float iWidth = _image.size.width; float iHeight = _image.size.height; float rate = 2.0; if((iHeight > WINDOW_HEIGHT) || (iWidth > WINDOW_WIDTH)) { rate = 2.0; } else if(WINDOW_WIDTH*1000/iWidth >= (WINDOW_HEIGHT)*1000/iHeight) { rate = WINDOW_HEIGHT/iHeight; if(rate < 2.0) { rate = 2.0; } } else if(WINDOW_WIDTH*1000/iWidth < (WINDOW_HEIGHT)*1000/iHeight) { rate = WINDOW_WIDTH/iWidth; if(rate < 2.0) { rate = 2.0; } } _imageViewBackground.backgroundColor = [UIColor colorWithHex:0x000000 alpha:1.0]; _imageViewBG = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT)]; _imageViewBG.backgroundColor = [UIColor colorWithHex:0x000000 alpha:1.0]; //_imageViewBG.image = _image; _imageViewBG.userInteractionEnabled = YES; _imageViewBG.hidden = NO; _scrollerView=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT)]; _scrollerView.delegate=self; _scrollerView.minimumZoomScale=0.5f; _scrollerView.maximumZoomScale= rate; if((iHeight > WINDOW_HEIGHT) || (iWidth > WINDOW_WIDTH)) { if(iWidth * 1000/WINDOW_WIDTH >= iHeight*1000/(WINDOW_HEIGHT)) { iHeight = iHeight*WINDOW_WIDTH/iWidth; iWidth = WINDOW_WIDTH; } else { iWidth = iWidth * (WINDOW_HEIGHT)/iHeight; iHeight = WINDOW_HEIGHT; } } _imageView = [[UIImageView alloc]initWithFrame:CGRectMake((WINDOW_WIDTH - iWidth)/2, (WINDOW_HEIGHT - iHeight)/2, iWidth, iHeight)]; _imageView.userInteractionEnabled = YES; [_imageView setImage:_image]; [_scrollerView addSubview:_imageViewBG]; [_scrollerView addSubview:_imageView]; [self.view addSubview:_scrollerView]; UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onClickBackGround)]; [_imageViewBG addGestureRecognizer:singleTap]; _imageViewBackground.hidden = NO; _imageViewBackground.userInteractionEnabled = YES; UITapGestureRecognizer *bGSingleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onClickBackGround)]; [_imageView addGestureRecognizer:bGSingleTap]; UITapGestureRecognizer *backGroundSingleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onClickBackGround)]; [_imageViewBackground addGestureRecognizer:backGroundSingleTap]; } - (UIStatusBarStyle)preferredStatusBarStyle { return UIStatusBarStyleLightContent; } - (BOOL)prefersStatusBarHidden { return NO; } - (UIView*)viewForZoomingInScrollView:(UIScrollView *)scrollView { for (id view in [_scrollerView subviews]) { if ([view isKindOfClass:[UIImageView class]]) { { if(_imageView == ((UIImageView *)view)) { return view; } } } } return nil; } - (void)scrollViewDidScroll:(UIScrollView *)scrollView; { if((_imageView.frame.size.width <= WINDOW_WIDTH) && (_imageView.frame.size.height <= WINDOW_HEIGHT)) { CGPoint centerPoint = self.view.center; _imageView.center = centerPoint; } } - (void)onClickBackGround { [self dismissViewControllerAnimated:NO completion:nil]; } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { } @end
