Quickblox用户在线状态IOS

Question

我一直在使用IOS版的quickblox sdk，我有一个关于用户在线状态的问题。

下面是推荐的代码。

QBUUser *user = ...;

NSInteger currentTimeInterval = [[NSDate date] timeIntervalSince1970];
NSInteger userLastRequestAtTimeInterval   = [[user lastRequestAt] timeIntervalSince1970];

// if user didn't do anything last 1 minute (60 seconds)    
if((currentTimeInterval - userLastRequestAtTimeInterval) > 60)
{ 
 // user is offline now
}

但我的疑问是，我是否需要在计时器事件中检查这一点，因为每隔5-10秒，我就想知道用户是否在线或是否有其他更好的方法？

Answer 1

Kudi，找出用户请求的最后日期的唯一方法是使用QBUUser lastRequestAt。

Answer 2

下面是我的自定义函数，用于了解用户的状态。我设置了一个计时器，每10秒计时一次。

 func update() {
            let currentTimeInterval: Int = Int(NSDate().timeIntervalSince1970)
            var userlastrew = Int()

            let rid = UInt(dialog.recipientID)
            var differ = Int()

            QBRequest.userWithID(rid, successBlock: { (response : QBResponse, user: QBUUser?) -> Void in
                userlastrew = Int((user?.lastRequestAt?.timeIntervalSince1970)!)
                differ = currentTimeInterval - userlastrew

                if differ > 120 {
                    let (d,h,m) = self.secondsToHoursMinutesSeconds(differ)
                    var txt = String()
                    if (d <= 0) {
                        if (m > 60 && h > 1 ) {
                            txt = "Last online \(h) hours ago"
                        }
                        if (m >= 60 && h == 1) {
                            txt =  "Last online \(h) hour ago"
                        }
                        if (m < 60 && h < 1) {
                            txt = "Last online \(m) minutes ago"
                        }
                        if (m < 60 && h == 1) {
                            txt = "Last online \(h) hour ago"
                        }
                        if (m < 60 && h > 1) {
                            txt = "Last online \(h) hours ago"
                        }
                    } else {
                        if (d > 1) {
                            txt = "Last online \(d) days ago"
                        } else {
                            txt = "Last online \(d) day ago"
                        }

                    }
                    //user is offline
                } else {
                    //user is online   
                }
                }, errorBlock: {(response: QBResponse) -> Void in
                    // Handle error
            })
        }

func secondsToHoursMinutesSeconds (seconds : Int) -> (Int, Int, Int) {
        return (seconds / 86400, seconds / 3600, (seconds % 3600) / 60)
    }