iOS 8 registerForRemoteNotifications 正确实现放置

Question

我见过很多不同的通知权限请求实现，但我仍然不知道哪一个是最好的。这可能是重复的，但我想要一个包含最新 Apple 推荐的 2015 答案。

我的一般问题是，是将 registerForRemoteNotifications 调用紧接在 registerUserNotificationSettings: 调用之前，紧接在它之后，还是放在 application:didRegisterUserNotificationSettings:委托(delegate)方法。

目前，我是这样的:

[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];

在设备上测试之后(这是第一次，因为用户对标准警报的响应被恼人地缓存，即使在重新安装应用程序之后也是如此)，我在控制台中得到了这个:

2015-02-16 16:27:33.025 AppName[2679:591060] NOTIFICATIONS: didRegisterForRemoteNotificationsWithDeviceToken: <XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX>

然后 Apple 的标准警报出现了，在选择是 之后，我在控制台中得到了这些:

2015-02-16 16:32:26.631 AppName[2679:591060] NOTIFICATIONS: application:didRegisterUserNotificationSettings:: <UIUserNotificationSettings: 0x174634300; types: (UIUserNotificationTypeAlert UIUserNotificationTypeBadge UIUserNotificationTypeSound);>
2015-02-16 16:32:27.229 AppName[2679:591060] NOTIFICATIONS: didRegisterForRemoteNotificationsWithDeviceToken: <XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX> // same token

didRegisterForRemoteNotificationsWithDeviceToken: 委托(delegate)是如何在响应警报之前被调用的？是因为这两个电话是一个接一个吗？

更新:

我做了另一个测试，在标准警报上我选择了No，我在控制台中得到了这些:

2015-02-16 16:54:37.472 AppName[2717:595759] NOTIFICATIONS: didRegisterForRemoteNotificationsWithDeviceToken: <XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX>
2015-02-16 16:54:44.353 AppName[2717:595759] NOTIFICATIONS: application:didRegisterUserNotificationSettings:: <UIUserNotificationSettings: 0x174432cc0; types: (none);>

因此 application:didFailToRegisterForRemoteNotificationsWithError: 从未被调用。

这怎么可能？这与 Apple 的文档相反。

Answer 1

My general question is whether to put the registerForRemoteNotifications call immediately before the registerUserNotificationSettings: call, immediately after it, or in it's application:didRegisterUserNotificationSettings: delegate method.

你得到一个好的答案了吗？我相信正确的地方是在 application:didRegisterUserNotificationSettings 在 app Delegate 中。从上面假设你想在你的 View Controller 而不是应用程序委托(delegate)中处理所有这些，在这个响应和 registerForRemoteNotifications 的响应中使用 NSNotification 并在你的 View Controller 中放置一个相应的监听器。

- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
{
    if (notificationSettings.types != UIUserNotificationTypeNone) {
        //register to receive notifications
        [application registerForRemoteNotifications];
    } else {
        // same as response to didFailToRegisterForRemoteNotificationsWithError
        NSDictionary* data = [NSDictionary dictionaryWithObject:@"" forKey:@"deviceToken"];
        [[NSNotificationCenter defaultCenter] postNotificationName:@"notificationsRegistered" object:self userInfo:data];
    }
}