在ios9.3

Question

我在安装ios9.3之后没有得到devicetoken，但之前在ios9.2.1中运行良好。

这是代码（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;有些人对测试版有同样的抱怨，因此可以在测试版iOS中告知bug。

Answer 2

尝试使用此方法，您将获得发生的错误。

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

Answer 3

我遇到了同样的问题。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{9.3}中也应该提供isRegisteredForRemoteNotifications。

但无论如何，我只是改变了if的情况 ([[[UIDevice currentDevice] systemVersion] compare:@"8.0" options:NSNumericSearch] != NSOrderedAscending)检查iOS版本，现在可以使用属性。

现在代码

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)];
}