ios - 数组!当我使用 NSString 时与 UInt8 不同

Question

我正在构建一个聊天应用程序，我在其中以 json 格式从服务器获取所有消息。结果是:

{"success":"true","userid":"2","messages":[{"id":"1","senderid":"1","receiverid":"2","message":"Hey there!"},{"id":"2","senderid":"1","receiverid":"2","message":"How are you?"},{"id":"3","senderid":"1","receiverid":"2","message":"Hey "},{"id":"4","senderid":"1","receiverid":"2","message":"Hey"},{"id":"5","senderid":"1","receiverid":"2","message":"Yo!"},{"id":"6","senderid":"1","receiverid":"2","message":"Yo!"},{"id":"7","senderid":"1","receiverid":"2","message":"asd"},{"id":"8","senderid":"2","receiverid":"1","message":"Leave me alone!"}]}

我正在尝试接收每个项目的消息，并将其显示在表格 View 中。

我的 TableView 有一个 NSArray，目前什么都没有，但是当它调用 getMessages() 方法时，我想用所有消息填充数组。

这是我的代码:

var content: AnyObject! = jsonData.valueForKey("messages")
for message in content as [NSDictionary] {
    if let m = message["message"] as? [NSString] {
        listDataArray += m
    }
}

但它抛出错误:

'NSArray!' is not identical to 'UInt8'

在线:

listDataArray += m

有什么办法解决这个问题吗？

Answer 1

你应该append到数组。+=运算符用于从数组添加元素

 listDataArray.append(m)

如果它是NSArray 让它成为NSMutableArray

  //Change where listDataArray declared
  var listDataArray:NSMutableArray = NSMutableArray()

  //addthe objects
  listDataArray.addObject(m)