- (void)tapImageView:(UITapGestureRecognizer *)tap

{

    UIView *imageView = tap.view;

    SDPhotoBrowser *browser = [[SDPhotoBrowser alloc] init];

    browser.currentImageIndex = imageView.tag; //当前点击的图片下标

    browser.sourceImagesContainerView = self;//self就是cell中的imgV的父view

    browser.imageCount = (int)self.photos.count; //图片的数量

    //browser.imageCount = self.picPathStringsArray.count;

    browser.delegate = self; //设置代理 在代理方法中加载放大后的图片

    [browser show]; 

}

还有两个重要的代理方法：

#pragma mark - SDPhotoBrowserDelegate

- (NSURL *)photoBrowser:(SDPhotoBrowser *)browser highQualityImageURLForIndex:(NSInteger)index

{

//    return [NSURL URLWithString:@"http://img01.taopic.com/160615/240367-16061509430238.jpg"];

return [NSURL URLWithString:_imgArr[index]];

}

- (UIImage *)photoBrowser:(SDPhotoBrowser *)browser placeholderImageForIndex:(NSInteger)index

{

CheckListCVCell * cell = (CheckListCVCell *)[self.collectionV cellForItemAtIndexPath:[NSIndexPath indexPathForRow:index inSection:0]];

UIImageView *imageView = cell.imageV;

return imageView.image;

}