WZStatusPhotoView *iv = [[WZStatusPhotoView alloc] init];
//添加监听事件
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageTap:)];
[iv addGestureRecognizer:tap];
//当点击图片的触发以下的事件
- (void)imageTap:(UITapGestureRecognizer *)tap
{
//添加蒙版
UIView *cover = [[UIView alloc] init];
cover.alpha = 0.0;
cover.backgroundColor = [UIColor blackColor];
cover.frame = [UIScreen mainScreen].bounds;
//把蒙版添加到Window上
[[UIApplication sharedApplication].keyWindow addSubview:cover];
// 给蒙板添加监听事件
UITapGestureRecognizer *coverTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(coverClick:)];
[cover addGestureRecognizer:coverTap];
//添加点击的事件到蒙版上
UIImageView *newIv = [[UIImageView alloc] init];
// 通过手势获取到点击的图片
WZStatusPhotoView *photoView = (WZStatusPhotoView *)tap.view;
// 从点击的imageview中取出对应的模型数据
NSURL *url = [NSURL URLWithString:photoView.photo.bmiddle_pic];
[newIv sd_setImageWithURL:url placeholderImage:[UIImage imageWithName:@"timeline_image_placeholder"]];
// 坐标系准换, 将:photoView.frame的坐标系从self(配图容器)的左上角转换为cover的左上角
newIv.frame = [self convertRect:photoView.frame toView:cover];
// 记录当前点击view的frame
self.lastFrame = newIv.frame;
// 记录缩放的view
self.customIV = newIv;
[cover addSubview:newIv];
// 缩放点击的图片
[UIView animateWithDuration:0.25 animations:^{
cover.alpha = 1.0;
// 设置图片的宽高和位置
CGRect tempFrame = newIv.frame;
tempFrame.size.width = cover.width;
tempFrame.size.height = tempFrame.size.width * (newIv.image.size.height / newIv.image.size.width);
tempFrame.origin.x = 0;
tempFrame.origin.y = (cover.height - tempFrame.size.height) * 0.5;
newIv.frame = tempFrame;
}];
}
//点击的时候，让图片缩回
- (void)coverClick:(UITapGestureRecognizer *)coverTap
{
UIView *view = coverTap.view;
// 缩小配图
[UIView animateWithDuration:0.25 animations:^{
self.customIV.frame = self.lastFrame;
view.alpha = 0.0;
} completion:^(BOOL finished) {
[view removeFromSuperview];
self.customIV = nil;
}];
}