ios - 错误解析 JSON 错误 3840

Question

我有一个返回 VALID JSON 数组的网络服务，但在我的代码中出现以下错误。

"Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x9b9af50 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}"

我知道这个错误是由于json中的错误。但我已经检查并验证了他们认为有效的各种来源的回复。

这是我的 JSON Objective-C 代码

NSDictionary *dictionary = [NSDictionary dictionaryWithJSONData:jsonData];

我也用这段代码来获取字典

NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&err];

但是当我调试并检查字典变量时，它显示“nil”

这是我的 json 响应

[  
   {  
      "id":"182",
      "name":"2 Tone Brown",
      "price":"2099.0000",
      "description":"",
      "image":"http:\/\/www.nnn.com\/images\/2 Tone BG.jpg",
      "images":[  
         {  
            "1":"2 Tone BG 1.jpg"
         },
         {  
            "2":"2 Tone BG 2.jpg"
         },
         {  
            "3":"2 Tone BG 3.jpg"
         },
         {  
            "4":"2 Tone BG 4.jpg"
         },
         {  
            "5":"2 Tone BG 5.jpg"
         }
      ],
      "sizes":[  
         {  
            "id":"16",
            "size":"L",
            "price":"0.0000"
         },
         {  
            "id":"17",
            "size":"XL",
            "price":"200.0000"
         },
         {  
            "id":"15",
            "size":"M",
            "price":"0.0000"
         },
         {  
            "id":"14",
            "size":"S",
            "price":"0.0000"
         },
         {  
            "id":"23",
            "size":"Custom Size",
            "price":"100.0000"
         },
         {  
            "id":"42",
            "size":"Please Select",
            "price":"0.0000"
         }
      ]
   },
   {  
      "id":"293",
      "name":"3 Seam Collar Black",
      "price":"2499.0000",
      "description":"Exclusive  3 Collar <br> <br> This beautiful but simple color combination gives you a great look. <br> <br> Colors: Red\/Black, Green\/Blue Check, Sky Blue",
      "image":"http:\/\/www.nnn.com\/images\/3 Seam Collar Black Main.jpg",
      "images":[  
         {  
            "1":"3 Seam Collar Black 1.jpg"
         },
         {  
            "2":"3 Seam Collar Black 6.jpg"
         },
         {  
            "3":"3 Seam Collar Black 2.jpg"
         },
         {  
            "4":"3 Seam Collar Black 3.jpg"
         },
         {  
            "5":"3 Seam Collar Black 5.jpg"
         },
         {  
            "6":"3 Seam Collar Black 4.jpg"
         }
      ],
      "sizes":[  
         {  
            "id":"17",
            "size":"XL",
            "price":"200.0000"
         },
         {  
            "id":"16",
            "size":"L",
            "price":"0.0000"
         },
         {  
            "id":"15",
            "size":"M",
            "price":"0.0000"
         },
         {  
            "id":"14",
            "size":"S",
            "price":"0.0000"
         },
         {  
            "id":"23",
            "size":"Custom Size",
            "price":"100.0000"
         }
      ]
   }
]

上面的 JSON 在 java 中运行良好，但不会产生任何结果。

Answer 1

由于您的 JSON 被 [...] 包围，它将返回一个数组，而不是字典。