推送權限的申請

• 加入頭文件

#ifdef NSFoundationVersionNumber_iOS_9_x_Max
#import <UserNotifications/UserNotifications.h>
#endif

申請權限

-(void) requestNotification
{
    if (@available(iOS 10, *))
    {
        UNUserNotificationCenter * center = [UNUserNotificationCenter currentNotificationCenter];
        center.delegate = self;
        [center requestAuthorizationWithOptions:UNAuthorizationOptionAlert | UNAuthorizationOptionBadge | UNAuthorizationOptionSound completionHandler:^(BOOL granted, NSError * _Nullable error) {
            
            if (granted) {
                // 允許推送
            }else{
                //不允許
            }
            
        }];
    }
    else if(@available(iOS 8 , *))
    {
        UIApplication * application = [UIApplication sharedApplication];
        
        [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]];
        [application registerForRemoteNotifications];
    }
    else
    {
        UIApplication * application = [UIApplication sharedApplication];
        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
        [application registerForRemoteNotifications];
    }
}

查看當前的權限

-(void) checkCurrentNotificationStatus
{
    if (@available(iOS 10 , *))
    {
         [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
            
            if (settings.authorizationStatus == UNAuthorizationStatusDenied)
            {
                // 沒權限
            }
            
        }];
    }
    else if (@available(iOS 8 , *))
    {
        UIUserNotificationSettings * setting = [[UIApplication sharedApplication] currentUserNotificationSettings];
        
        if (setting.types == UIUserNotificationTypeNone) {
            // 沒權限
        }
    }
    else
    {
        UIRemoteNotificationType type = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
        if (type == UIUserNotificationTypeNone)
        {
            // 沒權限
        }
    }
}

沒權限進入設置頁面

#pragma mark 沒權限的彈窗
-(void) showAlrtToSetting
{
    UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"您還沒有允許****權限" message:@"去設置一下吧" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction * cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
    }];
    UIAlertAction * setAction = [UIAlertAction actionWithTitle:@"去設置" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        NSURL * url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        dispatch_async(dispatch_get_main_queue(), ^{
            if ([[UIApplication sharedApplication] canOpenURL:url]) {
                [[UIApplication sharedApplication] openURL:url];
            }
        });
        
    }];
    
    [alert addAction:cancelAction];
    [alert addAction:setAction];
    
    [self presentViewController:alert animated:YES completion:nil];
}

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