Ios 请求用户在触发本地通知时显示警报的权限

我想在本地通知被触发时显示警报，但为此我必须请求许可，正如我在iPhone上运行应用程序时对我说的那样：

试图安排本地通知{火灾日期=2014年6月13日星期五12小时10分钟27秒中欧夏季时间，时区=（null），重复间隔=0，重复计数=UILocalNotificationInfiniteRepeatCount，下一次火灾日期=2014年6月13日星期五12小时10分钟27秒中欧夏季时间，用户信息=（null）}具有警报，但尚未收到用户显示警报的权限

我该怎么做？ 以下是目前的代码：

    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    localNotif.fireDate = [[NSDate date] dateByAddingTimeInterval:timeUntilNotification];
    localNotif.soundName = UILocalNotificationDefaultSoundName;
    localNotif.alertBody = @"ZEIT!";
    localNotif.alertAction = @"Show me the Timer!";
    localNotif.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] +1;


    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

---

添加此代码，它将显示一个警报视图以请求用户权限

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

---

您可以在应用程序中添加此代码：didFinishLaunchingWithOptions；方法，这样应用程序将在用户启动应用程序时询问用户，或者您可以在设置本地通知时添加此代码，这取决于您。

蘇健豪'她回答得很好

在Swift中，它如下所示：

let registerUserNotificationSettings = UIApplication.instancesRespondToSelector("registerUserNotificationSettings:")

if registerUserNotificationSettings { 
    var types: UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Sound     
    UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotific‌​ationSettings(forTypes: types, categories: nil))
} 

---

另请参见此处：

为Objective-C尝试此选项

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        NSLog(@"didFinishLaunchingWithOptions");

        if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]) {
            [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeSound categories:nil]];
        }

        return YES; 
    }

---

用迅捷的语言

var type = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound;
var setting = UIUserNotificationSettings(forTypes: type, categories: nil);
UIApplication.sharedApplication().registerUserNotificationSettings(setting);
UIApplication.sharedApplication().registerForRemoteNotifications();

---

iOS 8需要请求许可。请看检查这一条：这段代码很棒，谢谢！大家注意：在你的应用程序中，如果你想请求用户允许发送通知，请仔细考虑，因为你不想在他们打开你的应用程序时吓跑他们。首先建立一些信任，然后征求他们的同意。UX思想食粮：）在swift中，它看起来是这样的：让registerUserNotificationSettings=UIApplication.InstanceResponsionToSelector（“registerUserNotificationSettings:”）如果registerUserNotificationSettings{var types:UIUserNotificationType=UIUserNotificationType.Alert | UIUserNotificationType.Sound UIApplication.sharedApplication（）.registerUserNotificationSettings（UIUserNotificationSettings（类型：类型，类别：nil））}建议iOS 8及以上版本使用此代码段。我可以重新询问吗？如果用户意外不允许此权限，我可以制作一个按钮吗？如果用户点击此按钮，应用程序将重新询问通知权限吗？

var type = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound;
var setting = UIUserNotificationSettings(forTypes: type, categories: nil);
UIApplication.sharedApplication().registerUserNotificationSettings(setting);
UIApplication.sharedApplication().registerForRemoteNotifications();