Question

我更新了swift 3，发现了很多错误。这是其中之一：

类型的价值＆＃39;任何？＆＃39;没有会员＆＃39;对象＆＃39;

这是我的代码：

jsonmanager.post( "http://myapi.com",
                      parameters: nil,
                      success: { (operation: AFHTTPRequestOperation?,responseObject: Any?) in
                        if(((responseObject? as AnyObject).object(forKey: "meta") as AnyObject).object(forKey: "status")?.intValue == 200 && responseObject?.object(forKey: "total_data")?.intValue > 0){
                            let aa: Any? = (responseObject? as AnyObject).object(forKey: "response")

                            self.data = (aa as AnyObject).mutableCopy() 
                        }

新错误更新：

可选链无效，表达式已生成＆＃39;任何？＆＃39;

和

无法调用非功能类型的值＆＃39;任何？！＆＃39;

在以前的版本7.3.1 swift 2中运行良好。

这是json回应：

{
 "meta":{"status":200,"msg":"OK"},
        "response":[""],
        "total_data":0
}

Answer 1

与Swift 2不同，Swift 3将Objective-C的id导入Any?而不是AnyObject?（参见this Swift evolution proposal）。要修复错误，您需要将所有变量强制转换为AnyObject。这可能类似于以下内容：

jsonmanager.post("http://myapi.com", parameters: nil) { (operation: AFHTTPRequestOperation?, responseObject: Any?) in
    let response = responseObject as AnyObject?
    let meta = response?.object(forKey: "meta") as AnyObject?
    let status = meta?.object(forKey: "status") as AnyObject?
    let totalData = response?.object(forKey: "total_data") as AnyObject?
    if status?.intValue == 200 && totalData?.intValue != 0 {
        let aa = response?.object(forKey: "response") as AnyObject?
        self.data = aa?.mutableCopy() 
    }
}

Answer 2

您的responseObject是Optional（具体而言是Any?），因此您必须打开它才能调用其方法或访问其属性，例如responseObject?.object(forKey: "meta")，框架中有几个地方过去非Optional的值现在是Optional，特别是在没有指定的可空性限定符的情况下在Objective-C中使用它们的地方。

Swift 3类型的价值＆＃39;任何？＆＃39;没有会员＆＃39;对象＆＃39;

2 个答案: