推送通知無法獲取設備令牌

Question

我正在嘗試獲取設備令牌，以便可以向其發送通知，但我一直收到錯誤消息：“ iOS 8.0及更高版本不支持enabledRemoteNotificationTypes。”

該設備已注冊，因為我可以在手機的通知設置中打開和關閉通知。 這是我用來嘗試檢索令牌的代碼：

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

我用以下代碼注冊設備：

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+: %@");
}

理想情況下，我想檢索設備令牌並將其發送到mysql數據庫，不知道如何執行此操作，因為我是一名Web開發人員，對Objective C不太熟悉

Answer 1

這是注冊遠程通知的方法：

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];
}

另外，如果您需要將其發送到后端，請首先在此處查看並在didRegisterForRemoteNotificationsWithDeviceToken:提取字符串令牌： iPhone設備令牌 didRegisterForRemoteNotificationsWithDeviceToken: 或NSString

然后使用AFNetworking或NSURLSession將其發送到您的后端API。 以這里為例： 使用NSURLSession發送POST請求

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);
}

使用上面的代碼獲取設備令牌，並獲取遠程通知，確保遠程通知的背景模式為開