維護一個程式，當手機升級到ios8之後就不能接收到遠端推送，顯示註冊失敗，查了下資料，原來是沒有獲取使用者許可，加了個方法試了下，ok

if ([[[UIDevice currentDevice]systemVersion ]integerValue] >= 8) {
        
        UIUserNotificationSettings*setting = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil];
        [application registerUserNotificationSettings:setting];
        [application registerForRemoteNotifications];
        
    }else{
        
        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert|UIRemoteNotificationTypeBadge|UIRemoteNotificationTypeSound];
        
    }
 

- (void)registerForRemoteNotificationTypes:(UIRemoteNotificationType)types NS_DEPRECATED_IOS(3_0, 8_0, <span style="color:#FF0000;">"Please use registerForRemoteNotifications and registerUserNotificationSettings: instead"</span>);