如何将 Array<AnyObject> 转换为空数组变量？

Question

问题：我无法将字符串数组（类型为“AnyObject”）分配给空数组。

步骤：
1. 获取包含字符串和数组的字典。
2. 通过键“照片”从该字典中获取一个数组。
注意：Xcode 的警告建议我给出显式类型“AnyObject”。
3. 创建一个空数组。
4. 尝试分配（失败）。

let responseDictionary = responseDict as [String : AnyObject]
let ricPhotos:AnyObject = responseDictionary["photos"]!              
var thePhotos:Array<AnyObject>?              
thePhotos = ricPhotos  <--- fails

编译器错误：

...'AnyObject' is not convertible to 'Array<AnyObject>'

问题：如何将 'ricPhotos' 分配给空数组 'thePhotos' 并最好将 'AnyObject' 转换为 'String'？

---

修订

let responseDictionary = responseDict as [String : AnyObject]
var anyObject: AnyObject? = responseDictionary["photos"]

好的，'anyObject' 看起来是一个字典，里面是 'photo'，它是一个数组；如数据所示。 这是一些数据（anyObject）：

{
    page = 1;
    pages = 1334;
    perpage = 100;
    photo =     (
                {
            farm = 3;
            "height_m" = 336;
            "height_s" = 161;
            "height_sq" = 75;
            "height_t" = 67;
            id = 15166756998;
            isfamily = 0;
            isfriend = 0;
            ispublic = 1;
            owner = "127012961@N08";
            secret = 053032f300;
            server = 2941;
            title = "You @NYPL";
            "url_m" = "https://farm3.staticflickr.com/2941/15166756998_053032f300.jpg";
            "url_s" = "https://farm3.staticflickr.com/2941/15166756998_053032f300_m.jpg";
            "url_sq" = "https://farm3.staticflickr.com/2941/15166756998_053032f300_s.jpg";
            "url_t" = "https://farm3.staticflickr.com/2941/15166756998_053032f300_t.jpg";
            "width_m" = 500;
            "width_s" = 240;
            "width_sq" = 75;
            "width_t" = 100;
        },
        ...etc.

我想获取“照片”数组。但我不能将 'anyObject' 转换为 'Dictionary' 以便下标。我试过了：

var anyObject:Dictionary = responseDictionary["photos"]

但我得到了：

'(String, AnyObject)' 不能转换为 '[String : AnyObject]'

所以我坚持：

var anyObject: AnyObject? = responseDictionary["photos"]

因此，使用 anyObject，我尝试访问“照片”：

let RicPhotos = anyObject["Photo"] as [String : AnyObject]

...我也试过了：

let RicPhotos = anyObject["Photo"] as Array<Dictionary<String,String>>

但我得到了：

'AnyObject?'没有名为“下标”的成员

我可以看到数据，但无法提取到空变量中。
我试图向下转换为特定类型（字典），但编译器拒绝。

必须有一种从字典中获取嵌入数组的严格方法，同时转换为相应的转换（没有“anyObject”）。

有什么想法吗？

Answer 1

编辑了我的答案以适合您的编辑...

let responseDictionary = [:] as [String : AnyObject]
var photosDic: AnyObject? = responseDictionary["photos"]
if let photosDic = photosDic as? Dictionary<String, AnyObject> {
    var photosArray: AnyObject? = photosDic["photo"]
    if let photosArray = photosArray as? Array<Dictionary<String, AnyObject>> {
        //There you go
    }
}