在ios9.3中未获取设备令牌或未调用didfailRemotenotification

Question

在安装了ios9.3之后，我没有得到devicetoken，但之前在ios9.2.1中工作得很好。

下面是代码(没什么特别的)

 if ([application respondsToSelector:@selector(isRegisteredForRemoteNotifications)]) {
    [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [application registerForRemoteNotifications];
}
else {
    // iOS < 8 Notifications
    [application registerForRemoteNotificationTypes:
     (UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound)];
}

Answer 1

如果您使用的是测试版，则可能会出现此问题。检查Apple Forum；有些人对测试版也有同样的抱怨，所以它可以在测试版的iOS中告诉bug。

Answer 2

尝试这个方法，你会知道发生了什么错误。

-(void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
NSlog("application:didFailToRegisterForRemoteNotificationsWithError: %@", error)
 }

Answer 3

我也有同样的问题。我发现这是因为[application respondsToSelector:@selector(isRegisteredForRemoteNotifications)]在上面的代码中返回了FALSE。我不知道为什么会发生这种情况，因为iOS 9.3.1中也应该提供isRegisteredForRemoteNotifications。

但不管怎样，我只是将if的大小写改为([[[UIDevice currentDevice] systemVersion] compare:@"8.0" options:NSNumericSearch] != NSOrderedAscending)来检查iOS版本，它现在可以正常工作了。

代码现在变成了

if (([[[UIDevice currentDevice] systemVersion] compare:@"8.0" options:NSNumericSearch] != NSOrderedAscending)) {
    // iOS 8 Notifications
    [[UIApplication sharedApplication] registerUserNotificationSettings:
     [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge)
                                       categories:nil]
     ];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
} else {
    // iOS < 8 Notifications
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound)];
}