从Swift 2.0中的JSON对象获取值

Question

我有以下JSON，它通过JSONLint.com进行验证，我唯一的问题是我似乎无法从中获取所有值。

{ 
"success": true, 
"message": null, 
"content": [{ 
    "url": "6\/image_2.png", 
    "date_added": "2015-12-02 22:43:05", 
    "comments": ["Awesome Pic", "WOOHOOOOO THIS IS GREAT"], 
    "likes": [] 
}, { 
    "url": "6\/image_4.png", 
    "date_added": "2015-12-02 22:42:59", 
    "comments": [], 
    "likes": [] 
}, { 
    "url": "2\/image_1.png", 
    "date_added": "2015-12-01 06:43:48", 
    "comments": [], 
    "likes": [] 
}, { 
    "url": "2\/image_4.png", 
    "date_added": "2015-12-01 06:43:48", 
    "comments": [], 
    "likes": [] 
}, { 
    "url": "2\/image_5.png", 
    "date_added": "2015-12-01 06:43:48", 
    "comments": ["EhHHHH"], 
    "likes": [] 
}]} 

我试了一切，但它只是失败。这是我到目前为止。

if(response["success"] as! Int == 1){ 
    if let images = response["content"] as AnyObject?{ 
      // Does not work if I put NSDictionary? instead of AnyObject 
      // PRINTS THE OBJECT 
      print(images) 
      if let url = images["url"] as String?{ 
       // DOES NOT WORK 
       print(url) 
      } 
     } 
    }else{ 
     // Print error 
     let response = response["message"] as! String 
     print(response) 
    } 

Answer 1

content是一个集合，而不是一个单一的对象。因此，而不是NSDictionary，您应该将其投到NSArray并遍历每个项目。

let isSuccess = response["success"] as! Bool 
if(isSuccess) 
{ 
    if let dataArr=response["content"] as? NSArray 
    { 
     for item in dataArr 
     { 
     if let itemDict = item as? NSDictionary 
     { 
      let url= itemDict["url"] as! String 
      //Access other properties also here 
     } 
     } 
    } 
}