如何在IBAction中要求通知許可？

Question

在我的入職申請中，我有一個UIPageViewController，其中包含一個用於授權通知的「引導」屏幕。用戶將點擊一個標籤爲「啓用通知」的按鈕，並出現通知權限對話框。我該如何做到這一點？

Answer 1

你可以把：

Objective-C的

UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter]; 
[center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound) 
         completionHandler:^(BOOL granted, NSError * _Nullable error) { 
          // Enable or disable features based on authorization. 
         }]; 
[[UIApplication sharedApplication] registerForRemoteNotifications]; // you can also set here for local notification. 

斯威夫特

let center = UNUserNotificationCenter.current() 
    center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in 
     // Enable or disable features based on authorization. 
    } 
    UIApplication.shared.registerForRemoteNotifications() // you can also set here for local notification. 

您IBAction內。

請記住也在文件中添加import UserNotifications爲斯威夫特或#import <UserNotifications/UserNotifications.h>爲Objective-C的，你必須IBAction，並確保Push Notification下target激活 - Capabilities - Push notification。

Answer 2

的Objective-C：

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