ios - 从 UIUserNotificationTypeNone 传递到 UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeBadge | UI用户通知类型声音

Question

您知道从 UIUserNotificationTypeNone 传递到 UIUserNotificationTypeAlert | 的方法吗？ UIUserNotificationTypeBadge | UIUserNotificationTypeBadge | UIUserNotificationTypeSound(iOS8)？

传递给 UIUserNotificationTypeNone 效果很好，但当用户尝试再次切换以启用...

这是我的代码:

 // Register for Push Notifications, if running iOS 8
                    if ([application respondsToSelector:@selector(registerUserNotificationSettings:)])
                    {
                        UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound);
                        UIUserNotificationSettings * settingsAvailable = [UIUserNotificationSettings settingsForTypes:userNotificationTypes categories:nil];
                        [application registerUserNotificationSettings:settingsAvailable];
                        [application registerForRemoteNotifications];
                    }

                    else
                    {
                        // Register for Push Notifications before iOS 8
                        [application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound)];
                    }

切换启用委托(delegate)“didRegisterUserNotificationSettings”方法后

// Register to receive notifications
[application registerForRemoteNotifications];

NSLog(@"The app is registered for the types: %@", notificationSettings);

返回:

The app is registered for the types: <UIUserNotificationSettings: 0x15e9e790; types: (none);>

提前致谢

Answer 1

这是因为系统设置中的通知设置已关闭。