ios - 在 SWIFT 中收到 ""作为来自 api 的响应时崩溃

Question

获取图像 url null 作为来自 api 的响应，有什么办法可以修复它。来自 api 的响应是:

"image_path" = "<null>";

尝试这样处理:

if !(arrList.objectAtIndex(indexPath.row).valueForKey("media")?.objectAtIndex(0).valueForKey("image_path") is NSNull) {
            // optional is NOT NULL, neither NIL nor NSNull
        }

还是卡死了，求指导。更新:

找到问题了，null其实不是问题。在下方发布回复以明确说明。

media =             (
                            {
                id = "97eb48a0-429a-11e6-873c-ad7b848648f1";
                "image_path" = "https://s3-eu-west-1.mazws.com/facebook_profile_images/15105131.png";
                "room_post_id" = "97c572e0-429a-11e6-b72b-fd489f63a1fc";
                "user_id" = "66fe22a0-4296-11e6-a1d9-69dc307add4b";
                "video_path" = "<null>";
            },
                            {
                id = "981a6880-429a-11e6-b039-736a0bf954dc";
                "image_path" = "<null>";
                "room_post_id" = "97c572e0-429a-11e6-b72b-fd489f63a1fc";
                "user_id" = "66fe22a0-4296-11e6-a1d9-69dc307add4b";
                "video_path" = "https://s3-eu-west-1.naws.com/facebook_profile_images/1255803.mp4";
            }
        );

这是正常的响应，现在是有问题的响应:

media =             (
        );

可以怎么处理吗？请指导。

Answer 1

像这样尝试..它不会崩溃

if let imgPath = arrList.objectAtIndex(indexPath.row).valueForKey("media")?.objectAtIndex(0).valu‌​eForKey("image_path") as? String {

//... your value is string 

}