如何遍历Any的数组

Question

我想知道我将如何遍历一系列不同类型的对象。数组如下所示：

var messages: [Any] = [SentMessage(sent_text: "Halla", date_sent: "24.des", isSent: true, sending: false), RecievedMessage(profile_image: UIImage(named: "baseline_account_box_black_18pt")!, recieved_text: "Hei hva skjer?", date_recieved: "25.des", isRecieved: true)]

我试图像这样转换迭代器：

for i in messages{

    guard let received = ReceivedMessage(i) else{
        return
    }


}

ReceivedMessages 和 SentMessages 都是结构，如果有必要查看更多代码，请询问。

Answer 1

使用可选绑定：

navigationBar

让guard let received = i as? ReceivedMessage 和messages采用通用协议，而不是将[Any]声明为ReceivedMessage，然后SentMessage将是采用该协议的对象数组：

messages