iOS7和iOS8注册Parse通知，编译器警告。

Question

我已经编写了一个应用程序，使其能够在iOS8中接收Parse通知，最近发现这些通知在iOS 9中无法正常工作，因此不得不更改我的代码，如下所示（在AppDelegate.m文件中）：

viewDidLoad:

if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        NSLog(@"Requesting permission for push notifications...iOS8"); // iOS 8
        UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert |
                                                        UIUserNotificationTypeBadge |
                                                        UIUserNotificationTypeSound);
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes categories:nil];
        [application registerUserNotificationSettings:settings];
        [application registerForRemoteNotifications];
    } else {
        NSLog(@"Registering device for push notifications..."); // iOS 7 and earlier
        [UIApplication.sharedApplication registerForRemoteNotificationTypes:
         UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge |
         UIRemoteNotificationTypeSound];
    }

并且：

- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    // Store the deviceToken in the current Installation and save it to Parse.
    PFInstallation *currentInstallation = [PFInstallation currentInstallation];
    [currentInstallation setDeviceTokenFromData:deviceToken];
    [currentInstallation saveInBackground];
}

我测试了iOS的两个版本，看起来都运行良好。但是，如果我在Xcode中将部署目标更改为iOS8或更高版本，我会收到以下编译器警告：

AppDelegate.m:62:10: 'UIRemoteNotificationTypeAlert' is deprecated: first deprecated in iOS 8.0 - Use UIUserNotificationType for user notifications and registerForRemoteNotifications for receiving remote notifications instead.

AppDelegate.m:62:42: 'UIRemoteNotificationTypeBadge' is deprecated: first deprecated in iOS 8.0 - Use UIUserNotificationType for user notifications and registerForRemoteNotifications for receiving remote notifications instead.

AppDelegate.m:63:10: 'UIRemoteNotificationTypeSound' is deprecated: first deprecated in iOS 8.0 - Use UIUserNotificationType for user notifications and registerForRemoteNotifications for receiving remote notifications instead.

/AppDelegate.m:61:42: 'registerForRemoteNotificationTypes:' is deprecated: first deprecated in iOS 8.0 - Please use registerForRemoteNotifications and registerUserNotificationSettings: instead

看到这些警告是否正常？是因为我在更高的部署目标中工作吗？还是我需要在代码中做出改变？看起来很奇怪，我不应该看到这些警告。任何指针都将不胜感激。谢谢！

- KexAri

Answer 1

如果您将部署目标更改为iOS 8，则无需检查是否为iOS 8（因为您的应用程序仅适用于iOS 8设备），因此会出现这些警告。因此，请像这样注册：

[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];

- Hossam Ghareeb

---

我将发布适用于iOS 7及以上版本的应用。有一件事让我感到困惑，如果我要开发适用于iOS 7及以上版本的应用，我需要将部署目标设置为iOS 7吗？ - KexAri

是的，只需将部署目标保留为iOS 7即可。 - Hossam Ghareeb

明白了，谢谢。模拟器会在哪个版本上运行？ - KexAri

如果您设置为iOS 7，则可以选择模拟器版本iOS 7或iOS 8。如果模拟器中没有iOS 7，请转到Xcode->首选项->下载选项卡->然后下载缺失的模拟器。 - Hossam Ghareeb

Answer 2

是的，这种方法在iOS8中已被弃用，但您可以使用以下代码来检查iOS7和iOS8上的条件并进行管理：

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)];
}

此外，在此基础上，添加以下代码行。

if ([launchOptions valueForKey:@"UIApplicationLaunchOptionsRemoteNotificationKey"]) {

    [self application:application didReceiveRemoteNotification:launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey]];

}

在parse.com上注册设备时，请确保您的applicationKey和ClientKey是正确的，除此之外，您的注册设备代码块是正确的，但这不会影响iOS的弃用。

- Ajay Gabani