- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
CJCollectionViewCell *iamgeCell = (CJCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
NSInteger count = self.imageArray.count;
// 1.封装图片数据
NSMutableArray *photos = [NSMutableArray arrayWithCapacity:count];

for (int i = 0; i < count; i++) {
CJImageInfo *photo = [[CJImageInfo alloc] init];
photo.url = [NSURL URLWithString:[self.imageArray[i] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]]; // 图片路径
if (indexPath.row == i) {
photo.srcImageView = [iamgeCell imageView]; // 来源于哪个UIImageView
}
[photos addObject:photo];
}

// 2.显示相册
CJImageBrowser *browser = [[CJImageBrowser alloc] init];
browser.currentPhotoIndex = indexPath.row; // 弹出相册时显示的第一张图片是？
browser.photos = photos; // 设置所有的图片
[browser show];

}