Error When Show test in label

Question

I use BMPlayer. When use func :

bmPlayerView.playTimeDidChange = { (currentTime: TimeInterval, totalTime: TimeInterval) in
            //            print("playTimeDidChange currentTime: \(currentTime) totalTime: \(totalTime)")
            self.subtitleShow(currentTime: currentTime)
        }

for show Subtitle in Label.

 func subtitleShow(currentTime: TimeInterval){

let millisecond = Int(currentTime * 1000)

                for i in (clip.subtitle?.enDialog)!{
                    if i.start <= millisecond && i.end >= millisecond {
                            subtitleLabel.text = i.text
                            return
                        }

                    }

            }

But Show Error:

Please help me

Do you read Error message ? – Adrian Bobrowski Feb 19 '17 at 07:39 — Adrian Bobrowski, Feb 19 '17 at 07:39

score 1 · Accepted Answer · answered Feb 19 '17 at 07:40

The error message simply tells you to update the label on the main thread:

bmPlayerView.playTimeDidChange = { (currentTime: TimeInterval, totalTime: TimeInterval) in
    DispatchQueue.main.async {
       self.subtitleShow(currentTime: currentTime)
    }
}

score 1 · Answer 2 · answered Feb 19 '17 at 07:43

If you want to change the UI, you must do it from the main thread. You can use this

bmPlayerView.playTimeDidChange = { (currentTime: TimeInterval, totalTime: TimeInterval) in
     // print("playTimeDidChange currentTime: \(currentTime) totalTime: \(totalTime)")
        dispatch_async(dispatch_get_main_queue()) { [weak self] () -> Void in
                    self?.subtitleShow(currentTime: currentTime)
        }

}

score 1 · Answer 3 · answered Feb 19 '17 at 07:43

1

You cant modify gui from background. For do this you need use

DispatchQueue.main.async(){
    //code
}

answered Feb 19 '17 at 07:43

Adrian Bobrowski

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Error When Show test in label

3 Answers3