// 获取当前应用程序的UIApplication对象    UIApplication *app = [UIApplication sharedApplication];        // iOS 8 系统要求设置通知的时候必须经过用户许可。    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];        [app registerUserNotificationSettings:settings];        // 设置应用程序右上角的"通知图标"Badge    app.applicationIconBadgeNumber = 10;  // 根据逻辑设置