iOS全屏展示图片（三种情况实现）

最近遇到一个需求：放大在页面中的图片，以达到展示的效果

这是一个全屏展示图片的小demo，主要分三种情况来实现：

1.正常页面中的ImageView

///主要使用了这两个方法+ (void)showImage:(UIImageView*)avatarImageView{UIImage *image =avatarImageView.image;// 获得根窗口UIWindow *window =[UIApplication sharedApplication].keyWindow;UIView *backgroundView =[[UIView alloc]initWithFrame:CGRectMake(0, 0, ZOOMVCWIDTH, ZOOMVCHEIGHT)];oldframe =[avatarImageView convertRect:avatarImageView.bounds toView:window];backgroundView.backgroundColor =[UIColor blackColor];backgroundView.alpha =0.5;UIImageView *imageView =[[UIImageView alloc]initWithFrame:oldframe];imageView.image =image;imageView.tag =1;[backgroundView addSubview:imageView];[window addSubview:backgroundView];//点击图片缩小的手势UITapGestureRecognizer *tap =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(hideImage:)];[backgroundView addGestureRecognizer:tap];[UIView animateWithDuration:0.3 animations:^{imageView.frame =CGRectMake(0,([UIScreen mainScreen].bounds.size.height-image.size.height*[UIScreen mainScreen].bounds.size.width/image.size.width)/2, [UIScreen mainScreen].bounds.size.width, image.size.height*[UIScreen mainScreen].bounds.size.width/image.size.width);backgroundView.alpha =1;}];}+ (void)hideImage:(UITapGestureRecognizer *)tap{UIView *backgroundView =tap.view;UIImageView *imageView =(UIImageView *)[tap.view viewWithTag:1];[UIView animateWithDuration:0.3 animations:^{imageView.frame =oldframe;backgroundView.alpha =0;} completion:^(BOOL finished) {[backgroundView removeFromSuperview];}];}

2.Tableview的cell上的图片

///tableview cell这个，主要使用了UIView的类方法， animateWithxxxUIImageView *imageView = (UIImageView *)[cell.contentView viewWithTag:9999];//小图的frameself.oldFrame = CGRectMake(cell.frame.origin.x+imageView.frame.origin.x, cell.frame.origin.y+imageView.frame.origin.y-self.tabView.contentOffset.y, imageView.frame.size.width, imageView.frame.size.height); //得到cell上的图片位置if (![self.bigImgView superview]) {self.bigImgView.image = imageView.image;[self.view.window addSubview:self.bigImgView];self.bigImgView.frame = self.oldFrame;[UIView animateWithDuration:0.5 animations:^{self.bigImgView.frame=CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);} completion:^(BOOL finished) {[UIApplication sharedApplication].statusBarHidden=YES;}];}

3.CollectioinView的cell上的图片

collection使用了一个第三方，冯大师的PhotoBroswer/**  展示网络图片*/-(void)networkImageShow:(NSUInteger)index{__weak typeof(self) weakSelf=self;[PhotoBroswerVC show:self type:PhotoBroswerVCTypeModal index:index photoModelBlock:^NSArray *{NSArray *networkImages=@[@"http://www.netbian.com/d/file/20150519/f2897426d8747f2704f3d1e4c2e33fc2.jpg",@"http://www.netbian.com/d/file/20130502/701d50ab1c8ca5b5a7515b0098b7c3f3.jpg",@"http://www.netbian.com/d/file/20110418/48d30d13ae088fd80fde8b4f6f4e73f9.jpg",@"http://www.netbian.com/d/file/20150318/869f76bbd095942d8ca03ad4ad45fc80.jpg",@"http://www.netbian.com/d/file/20110424/b69ac12af595efc2473a93bc26c276b2.jpg",@"http://www.netbian.com/d/file/20130502/701d50ab1c8ca5b5a7515b0098b7c3f3.jpg",@"http://www.netbian.com/d/file/20110418/48d30d13ae088fd80fde8b4f6f4e73f9.jpg",@"http://www.netbian.com/d/file/20150318/869f76bbd095942d8ca03ad4ad45fc80.jpg",@"http://www.netbian.com/d/file/20110424/b69ac12af595efc2473a93bc26c276b2.jpg",@"http://www.netbian.com/d/file/20130502/701d50ab1c8ca5b5a7515b0098b7c3f3.jpg",@"http://www.netbian.com/d/file/20110418/48d30d13ae088fd80fde8b4f6f4e73f9.jpg",@"http://www.netbian.com/d/file/20150318/869f76bbd095942d8ca03ad4ad45fc80.jpg",@"http://www.netbian.com/d/file/20110424/b69ac12af595efc2473a93bc26c276b2.jpg",@"http://www.netbian.com/d/file/20140522/3e939daa0343d438195b710902590ea0.jpg",@"http://www.netbian.com/d/file/20141018/7ccbfeb9f47a729ffd6ac45115a647a3.jpg",];NSMutableArray *modelsM = [NSMutableArray arrayWithCapacity:networkImages.count];for (NSUInteger i = 0; i< networkImages.count; i++) {PhotoModel *pbModel=[[PhotoModel alloc] init];pbModel.mid = i + 1;//            pbModel.title = [NSString stringWithFormat:@"这是标题%@",@(i+1)];//            pbModel.desc = [NSString stringWithFormat:@"我是一段很长的描述文字我是一段很长的描述文字我是一段很长的描述文字我是一段很长的描述文字我是一段很长的描述文字我是一段很长的描述文字%@",@(i+1)];pbModel.image_HD_U = networkImages[i];//源frameUIImageView *imageV =(UIImageView *) weakSelf.collectionView.subviews[i];pbModel.sourceImageView = imageV;[modelsM addObject:pbModel];}return modelsM;}];}

具体代码详见github，如果帮到了您，麻烦给个star,O(∩_∩)O谢谢