Question

现在我通过didRegisterForRemoteNotificationsWithDeviceToken获取设备令牌。但是，我需要在用户登录后在我的应用程序中使用设备令牌。

如何在以后从应用程序的其他位置访问deviceToken，如果我不能，我将如何/在哪里将其存储在didRegisterForRemoteNotificationsWithDeviceToken中，以便稍后可以检索它？

Answer 1

最好将keychain用于此类数据。

将此类功能添加到您的项目

import UIKit
import Security
class Keychain {

  class func save(key: String, data: NSData) -> Bool {
    let query = [
        kSecClass as String       : kSecClassGenericPassword as String,
        kSecAttrAccount as String : key,
        kSecValueData as String   : data ]

    SecItemDelete(query as CFDictionaryRef)

    let status: OSStatus = SecItemAdd(query as CFDictionaryRef, nil)

    return status == noErr
  }

  class func load(key: String) -> NSData? {
    let query = [
        kSecClass as String       : kSecClassGenericPassword,
        kSecAttrAccount as String : key,
        kSecReturnData as String  : kCFBooleanTrue,
        kSecMatchLimit as String  : kSecMatchLimitOne ]

    var dataTypeRef :Unmanaged<AnyObject>?

    let status: OSStatus = SecItemCopyMatching(query, &dataTypeRef)

    if status == noErr {
        return (dataTypeRef!.takeRetainedValue() as NSData)
    } else {
        return nil
    }
  }

  class func delete(key: String) -> Bool {
    let query = [
        kSecClass as String       : kSecClassGenericPassword,
        kSecAttrAccount as String : key ]

    let status: OSStatus = SecItemDelete(query as CFDictionaryRef)
    return status == noErr
  }

  class func clear() -> Bool {
    let query = [ kSecClass as String : kSecClassGenericPassword ]
    let status: OSStatus = SecItemDelete(query as CFDictionaryRef)   
    return status == noErr
  }
}

你就像这样使用它

要存储（传递是您的案例中的字符串，令牌）

if let data = pass.dataUsingEncoding(NSUTF8StringEncoding,allowLossyConversion: false)  {
  let saveSuccess = Keychain.save("Password", data: data)
}

加载

data = Keychain.load("Password") 
var pass =NSString(data: data, encoding: UInt())

Answer 2

最简单的方法是使用NSUserDefaults

保存：

NSUserDefaults * ud = [NSUserDefaults standardUserDefaults];
[ud setObject:myPushToken forKey:@"currentPushToken"];
[ud synchronize];

恢复：

NSString * currentPushToken = [[NSUserDefaults standardUserDefaults] objectForKey:@"currentPushToken"];

我在哪里可以存储iOS设备令牌供以后使用？

2 个答案: