registerUserNotificationSettings 不显示警报

Question

我请求用户允许在 iOS 8 上使用本地通知，如下所示：

    if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]){
    UIUserNotificationType types = UIUserNotificationTypeBadge |
    UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
    UIUserNotificationSettings *notificationSettings =
    [UIUserNotificationSettings settingsForTypes:types categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
}

我在我的 AppDelegate 中是这样处理的：

-(void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings {
[[NSNotificationCenter defaultCenter] postNotificationName:@"didRegisterUserNotificationSettings" object:nil];
}

但是没有提示？它直接跳到委托回调。为什么是这样？我正在 iOS 模拟器中执行此操作。

谢谢！

Answer 1

警报只显示一次，要在模拟器上再次显示它应该按 iOS Simulator -> Reset Contents and Settings

registerUserNotificationSettings 不显示警报

registerUserNotificationSettings doesn't display alert

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objective-c

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