示例圖:
點(diǎn)擊放大圖.gif
@property (strong, nonatomic) UIScrollView *scrollView;
@property (strong, nonatomic) UIImageView *lastImageView;
@property (nonatomic, assign)CGRect originalFrame;
-(void)showZoomImageView
{
//scrollView作為背景
UIScrollView *bgView = [[UIScrollView alloc] init];
bgView.frame = [UIScreen mainScreen].bounds;
bgView.backgroundColor = [UIColor blackColor];
UITapGestureRecognizer *tapBg = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapBgView:)];
[bgView addGestureRecognizer:tapBg];
UIImageView *imageView = [[UIImageView alloc] init];
NSURL *imgUrl = [NSURL URLWithString:[NSString stringWithFormat:@"%@/property/%@",BASEURL,[signModel headimgUrl]]];
[imageView sd_setImageWithURL:imgUrl placeholderImage:[UIImage imageNamed:@"taskOwner"]];
// imageView.frame = [bgView convertRect:picView.frame fromView:self.view];
imageView.frame = CGRectMake(kScreen_Width - 80, 130, 0, 0); //設(shè)置原始位置
[bgView addSubview:imageView];
[[[UIApplication sharedApplication] keyWindow] addSubview:bgView];
self.lastImageView = imageView;
self.originalFrame = imageView.frame;
self.scrollView = bgView;
//最大放大比例
self.scrollView.maximumZoomScale = 1.5;
self.scrollView.delegate = self;
[UIView animateWithDuration:0.5 animations:^{
CGRect frame = imageView.frame;
frame.size.width = bgView.frame.size.width;
frame.size.height = frame.size.width * (imageView.image.size.height / imageView.image.size.width);
frame.origin.x = 0;
frame.origin.y = (bgView.frame.size.height - frame.size.height) * 0.5;
imageView.frame = frame;
}];
}
-(void)tapBgView:(UITapGestureRecognizer *)tapBgRecognizer
{
self.scrollView.contentOffset = CGPointZero;
[UIView animateWithDuration:0.5 animations:^{
self.lastImageView.frame = self.originalFrame;
tapBgRecognizer.view.backgroundColor = [UIColor clearColor];
} completion:^(BOOL finished) {
[tapBgRecognizer.view removeFromSuperview];
self.scrollView = nil;
self.lastImageView = nil;
}];
}
#pragma ScrollView //返回可縮放的視圖
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return self.lastImageView;
}
參考腳步之家網(wǎng)站的hebedich
http://www.jb51.net/article/74846.htm
