ios - 如何处理用户选择通知设置权限警报

Question

在某些 View Controller 中，我弹出这个通知设置消息:

My app would like to to send you Notifications which may include alerts, sounds and icon badges. These can be configured in Settings

如何处理消息的 Don't Allow 和 Allow 按钮？

如果用户点击允许，我需要在同一个 View Controller 中更改标签文本。

Answer 1

我假设您的应用中某处有这样的代码:

UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:... categories:...];
[application registerUserNotificationSettings:settings];

这样做之后，系统将显示您正在谈论的警报。在那一刻，应用程序将收到 UIApplicationWillResignActiveNotification(您可以在应用程序委托(delegate)中或通过 NSNotificationCenter 注册)。然后，在用户做出选择后，系统将发送 UIApplicationDidBecomeActiveNotification(也在应用程序委托(delegate)中或通过通知)。此时，使用如下代码检查权限:

UIUserNotificationSettings *settings = application.currentUserNotificationSettings;
if (settings.types & UIUserNotificationTypeSound & UIUserNotificationTypeBadge) {
    // sound and icon badge allowed
}
else {
    // either sound or icon badge or both disallowed
}