如果registerForRemoteNotificationTypes:在iOS 8.0及更高版本中不受支持，则为iOS构建

Question

如果设备注册通知的方式发生了重大变化，我们不能再使用registerForRemoteNotificationTypes：，如果我们不能使用Xcode6测试版，我们如何构建一个新版本的应用程序来支持iOS 8？我们是否必须在Xcode6GM版本发布的当天构建并提交，才能让我们的用户继续获得推送通知？

Answer 1

iOS 8更改了通知注册。因此，您需要检查设备版本，然后您需要注册通知设置。(请检查this链接。)我在Xcode6上尝试了这段代码，它对我很有效。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
        {
            [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
            [[UIApplication sharedApplication] registerForRemoteNotifications];
        }
        else
        {
            [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
             (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
        }

     return YES;
}

Answer 2

您可能希望考虑使用respondsToSelector，而不是检查系统版本：

if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]){
    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}
else{
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
}

Answer 3

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
#else
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
#endif