推送通知无法获取设备令牌

Question

我正在尝试获取设备令牌，以便向其发送通知，但我一直收到错误 "enabledRemoteNotificationTypes is not supported in iOS 8.0 and later."

设备已注册，因为我可以在 phone 的通知设置中关闭和打开通知。这是我用来尝试检索令牌的代码：

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
NSString *str = [NSString stringWithFormat:@"Device Token=%@",deviceToken];
NSLog(@"This is device token%@", deviceToken);
}

我正在使用此代码注册设备：

if ([application   respondsToSelector:@selector(isRegisteredForRemoteNotifications)])
{
    // iOS 8 Notifications
    [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];

    [application registerForRemoteNotifications];
    NSLog(@"ios 8+: %@");
}
else
{
    // iOS < 8 Notifications
    [application registerForRemoteNotificationTypes:
     (UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert |      UIRemoteNotificationTypeSound)];
    NSLog(@"< ios 8+: %@");
}

理想情况下，我想检索设备令牌并将它们发送到 mysql 数据库，不知道如何执行此操作，因为我是一名网络开发人员并且不太熟悉 Objective C

Answer 1

这是您应该注册远程通知的方式：

if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerForRemoteNotifications)])
{
    UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
    UIUserNotificationSettings *mySettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];

    [[UIApplication sharedApplication] registerUserNotificationSettings:mySettings];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
} else {
    UIRemoteNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:types];
}

此外，如果你需要将它发送到你的后端，你首先看这里并在didRegisterForRemoteNotificationsWithDeviceToken:中提取一个字符串令牌：Iphone device token - NSData or NSString

然后使用 AFNetworking 或 NSURLSession 将其发送到您的后端 API。看看这里例如：Send POST request using NSURLSession

Answer 2

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
 {

        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
    }
    else
    {
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
         (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
    }

return YES;
}

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken 
{
    NSString *myDeviceToken = [[deviceToken description] stringByTrimmingCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:@"<>"]];
    myDeviceToken = [myDeviceToken stringByReplacingOccurrencesOfString:@" " withString:@""];

    NSLog(@"Device Token: %@", myDeviceToken);
}

使用上面的代码获取设备令牌，并获取远程通知请确保您的后台模式已开启以进行远程通知

推送通知无法获取设备令牌

Push Notifications Cannot get Device Token

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