Невозможно преобразовать значение типа «NSData» в ожидаемый тип аргумента «String»

Question

Я пишу коды в swift в XCode. Это код:.

import UIKit 
import Foundation 

@UIApplicationMain 
class AppDelegate: UIResponder, UIApplicationDelegate { 

    var window: UIWindow? 


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 
     // Override point for customization after application launch. 

     let notificationTypes : UIUserNotificationType = [.Alert, .Badge, .Sound] 
     let notificationSettings : UIUserNotificationSettings = UIUserNotificationSettings(forTypes: notificationTypes, categories: nil) 
     UIApplication.sharedApplication().registerUserNotificationSettings(notificationSettings) 

     return true 
    } 

    func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) 
    { 
     UIApplication.sharedApplication().registerForRemoteNotifications() 
    } 

    func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) { 

     print("TOKEN:", deviceToken); 

     let token = String(data: deviceToken, encoding: NSUTF8StringEncoding); 
     let myUrl = NSURL(fileURLWithPath: "http://......php?id=" + token); 

     print("URL:",fileURLWithPath: "http://......php?id=" + token); 

    } 


    func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) { 
     print(error.localizedDescription) 
    } 

    /* func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) { 

    }*/ 


    func applicationWillResignActive(application: UIApplication) { 
     // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. 
     // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. 
    } 

    func applicationDidEnterBackground(application: UIApplication) { 
     // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 
    } 

    func applicationWillEnterForeground(application: UIApplication) { 
     // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. 
    } 

    func applicationDidBecomeActive(application: UIApplication) { 
     // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. 
    } 

    func applicationWillTerminate(application: UIApplication) { 
     // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 
    } 


} 

Компилятор дает мне ошибку на func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) { «и он говорит мне» Cannot convert value of type 'NSData' to expected argument type'String'»... но я не могу понять, как решить эту проблему так, может кто-нибудь помочь мне исправить ошибку?

Answer 1

использовать это, для отправки маркера на сервер. работал хорошо для меня

var token: String = "\(deviceToken)" 
    let rawtoken = token.stringByReplacingOccurrencesOfString(">", withString: "") 
    let cleantoken = rawtoken.stringByReplacingOccurrencesOfString("<", withString: "") 
    var finaltoken = cleantoken.stringByReplacingOccurrencesOfString(" ", withString: "") 

Конечный токен - это тот, который вы должны использовать.

Источник был Udemy онлайн-курсов.

Answer 2

var charSet: NSCharacterSet = NSCharacterSet(charactersInString: "<>") 
var tokenStr: String = (deviceToken.description as NSString) 
      .stringByTrimmingCharactersInSet(characterSet) 
      .stringByReplacingOccurrencesOfString(" ", withString: "") as String 

print(deviceTokenString) 

Попробуйте что

Answer 3

Обратите внимание, что токен является BINARY, поэтому вы не можете легко преобразовать его в строку (без UTF8!). Это хорошая практика, чтобы преобразовать его в шестнадцатеричный:

let tokenChars = UnsafePointer<CChar>(deviceToken.bytes) 
var tokenString = "" 

for var i = 0; i < deviceToken.length; i++ { 
    tokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]]) 
} 

print("Push token: \(tokenString)")