如何将这几种不同的值类型组合到 NSData 中呢？

Question

我需要使用 MultipeerConnectivity 将图像和一些字符串数组发送到另一台设备。在接收方，API是func session(session: MCSession, didReceiveData data: NSData, fromPeer peerID: MCPeerID)，它只接收NSData数据。但是我需要发送这样的东西：

struct data{
var imageData:NSData?
var location:[String:String]?
var information:[String]?
var sliderInfo:[String]?
var questionsAndAnswer:[String:String]?
var secrets: String?
var tempts: Int?

}

dataStructure 中有许多不同的值类型，但如何将此自定义数据结构转换为 NSData，然后在接收方对其进行解码？我正在为这个项目使用 Swift。

Answer 1

如果你把它做成一个采用NSCoding的NSObject子类，你会更轻松。 NSCoding 和 NSKeyedArchiver 是将任意数据序列化为 NSData 并稍后检索任意数据的方式。

Answer 2

NSMutableDictionary *mutDic = [NSMutableDictionary dictionary];
[mutDic setValue:data.imageData forKey:@"imageData"];
[mutDic setValue:data.location forKey:@"location"];
[mutDic setValue:data.information forKey:@"information"];
[mutDic setValue:data.sliderInfo forKey:@"sliderInfo"];

Answer 3

我用另一种方法来解决这个问题：在发送方，发送 Dictionary:[String:[String]]，对其进行编码，并在接收方对其进行解码。对于 NSData，我再次发送。将其与其他数据分开。

        let imageData = UIImageJPEGRepresentation(self.detailImage!, 1.0)

        let msg = ["clickHidenInfo":[clickHidenInfo],"swipeInfo":upDownLeftRight,"sliderInfo":slideHiddenInforation,"locationInfo":["x1,y1,info","x2,y2,info"],"qa":["what's your name","Jerry"],"hints":["hints I provide"],"tempts":["tempts you can use"]]



//sender:
        let msgData = NSKeyedArchiver.archivedDataWithRootObject(msg)

        do
        {
            try self.session?.sendData(imageData!, toPeers: (self.session?.connectedPeers)!, withMode: .Unreliable)
            print("succee")
        }
        catch{
            print("failure")
        }

        do
        {
            try self.session?.sendData(msgData, toPeers: (self.session?.connectedPeers)!, withMode: .Unreliable)
            print("succee")
        }
        catch{
            print("failure")
        }
//receiver side
dispatch_async(dispatch_get_main_queue()){


        let dict = NSKeyedUnarchiver.unarchiveObjectWithData(data)
        if dict == nil
        {
            self.guessImage.image = UIImage(data: data)
            self.guessImage.reloadInputViews()
        }
        else
        {
            let result = NSKeyedUnarchiver.unarchiveObjectWithData(data) as? Dictionary<String,[String]>
            let a = result!["swipeInfo"]
            print("\(a![0])")
        }


    }

如何将这几种不同的值类型组合到 NSData 中呢？

How to combine these several different value type to NSData?

ios

swift

nsdata

multipeer-connectivity