Question

我使用以下代码从推送通知接收自定义数据，我收到以下错误：

无法将'__NSArrayM'（0x1b0776cf0）类型的值转换为'NSDictionary'（0x1b0777128）。

在以下一行：

let jsonData = try? JSONSerialization.jsonObject(with: (customDataString?.data(using: String.Encoding.utf8))!, options: JSONSerialization.ReadingOptions.mutableContainers) as![String: Any]

如何解决此错误？

func onPushAccepted(_ pushManager: PushNotificationManager!, withNotification pushNotification: [AnyHashable : Any]!, onStart: Bool) {
    print("Push notification accepted: \(pushNotification!)")

    let customDataString = pushManager.getCustomPushData(pushNotification)

    if customDataString != nil {
        let jsonData = try? JSONSerialization.jsonObject(with: (customDataString?.data(using: String.Encoding.utf8))!, options: JSONSerialization.ReadingOptions.mutableContainers) as! [String: Any]

        print("*** \(jsonData?["test"]!)")
    }

Answer 1

阅读错误：

无法将预期类型数组的值转换为提供类型字典

这意味着你的JSON是一个数组，所以

if let customDataString = pushManager.getCustomPushData(pushNotification) {   
   let data = customDataString.data(using: utf8)!
   let jsonData = try? JSONSerialization.jsonObject(with: data) as! [[String:Any]]
   ...

您可以省略options参数，因为.mutableContainers无论如何都无法在Swift中使用。

Json Serialization Swift 3类型错误

1 个答案: