启用和禁用远程通知

Question

应用程序的用户必须能够通过按开/关按钮来启用/禁用远程通知。

应用在“didFinishLaunchingWithOptions”中注册远程通知。 当用户单击按钮禁用远程通知时，代码为

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

                    else
                    {
                        // Register for Push Notifications before iOS 8
                        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeNone];
                    }

这行得通。远程通知已禁用！

但是当用户再次点击启用远程通知时

    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)];

                    }

应用未注册任何类型（警报、徽章或声音）

一些建议？提前致谢。

Answer 1

您应该在这里分离出两个概念：首先是要求用户获得接收推送通知的权限，这就是您正在做的事情。获得该权限后，请勿将其关闭。据我了解，您只能请求此权限一次，之后必须在设置应用程序中进行更改（设置 -> 通知）。

您可能应该做的是要求启用一次推送通知，同时在应用程序中跟踪您的推送是在哪里生成的，无论用户是否想要接收推送。 permission 级别由 iOS 管理。次要（开/关）级别由您管理。