请求用户许可在 iOS 8 中接收 UILocalNotifications [英] Ask for User Permission to Receive UILocalNotifications in iOS 8

问题描述

我已经在 App Delegate 中设置了本地通知:

I have set up local notifications in the App Delegate Using this:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    UILocalNotification *notification = [[UILocalNotification alloc]init];
    [notification setAlertBody:@"Watch the Latest Episode of CCA-TV"];
    [notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:5]];
    [notification setTimeZone:[NSTimeZone defaultTimeZone]];
    [application setScheduledLocalNotifications:[NSArray arrayWithObject:notification]];
}

当我运行应用程序然后退出时，我收到一条错误消息:

When I run the app and then quit it I receive an error saying:

2014-06-07 11:14:16.663 CCA-TV[735:149070] 尝试安排本地通知 {fire日期 = 2014 年 6 月 7 日星期六 11:14:21 太平洋夏令时间，时间zone = America/Los_Angeles (PDT) 偏移 -25200(日光)，重复间隔 = 0，重复计数 = UILocalNotificationInfiniteRepeatCount，下一个开火日期 = 2014 年 6 月 7 日星期六 11:14:21 Pacific Daylight时间，用户信息 = (null)} 有警报但没有收到来自用户的显示警报的权限

2014-06-07 11:14:16.663 CCA-TV[735:149070] Attempting to schedule a local notification {fire date = Saturday, June 7, 2014 at 11:14:21 Pacific Daylight Time, time zone = America/Los_Angeles (PDT) offset -25200 (Daylight), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Saturday, June 7, 2014 at 11:14:21 Pacific Daylight Time, user info = (null)} with an alert but haven't received permission from the user to display alerts

我如何获得显示警报的必要权限?

How can I get the necessary permission to display the alerts?

推荐答案

从 iOS 8 开始，您需要征得用户的许可才能显示来自您的应用的通知，这适用于远程/推送和本地通知.在 Swift 中你可以这样做，

Since iOS 8 you need to ask user's permission to show notifications from your app, this applies for both remote/push and local notifications. In Swift you can do it like this,

Swift 2.0 的更新

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    // Override point for customization after application launch.
    if(UIApplication.instancesRespondToSelector(Selector("registerUserNotificationSettings:")))
    {
        let notificationCategory:UIMutableUserNotificationCategory = UIMutableUserNotificationCategory()
        notificationCategory.identifier = "INVITE_CATEGORY"
        notificationCategory.setActions([replyAction], forContext: UIUserNotificationActionContext.Default)

        //registerting for the notification.
        application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes:[.Sound, .Alert, .Badge], categories: nil))
    }
    else
    {
       //do iOS 7 stuff, which is pretty much nothing for local notifications.
    }
    return true
}

Swift 3.2

if(UIApplication.instancesRespond(to: #selector(UIApplication.registerUserNotificationSettings(_:)))){
     let notificationCategory:UIMutableUserNotificationCategory = UIMutableUserNotificationCategory()
     notificationCategory.identifier = "INVITE_CATEGORY"
     notificationCategory.setActions([replyAction], forContext: UIUserNotificationActionContext.Default)

     //registerting for the notification.
        application.registerUserNotificationSettings(UIUserNotificationSettings(types:[.sound, .alert, .badge], categories: nil))
}
else{
        //do iOS 7 stuff, which is pretty much nothing for local notifications.
    }

Objective C 语法也非常相似.

Objective C syntax is also very similar.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]){
        [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
    }
    // Override point for customization after application launch.
    return YES;
}

要检查当前注册的通知类型，您可以使用 UIApplication 类的方法，

To check for currently registered notification types you can use UIApplication class's method,

- (UIUserNotificationSettings *)currentUserNotificationSettings

因此，如果用户对您的应用程序说不，那么此函数应返回一个没有任何类型的设置.

So if the user has said no to your app then this function should return a setting without any types in it.

我写了一篇关于这个的教程，你可以看看 此处.

这篇关于请求用户许可在 iOS 8 中接收 UILocalNotifications的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！