Question

我在swift中使用自定义单元格和VLCPlayer创建了一个iOS应用。在我的项目中，我将点击特定的单元格，VLCPlayer将根据该单元格中的fileID下载视频。

当VLCPlayer未显示任何流式传输时，UITableView工作正常，并且didSelectRowAtIndexPath会立即调用。

我的问题是：在我的VLCPlayer成为播放流之后，我必须在该单元格中按住3秒才能调用didSelectRowAtIndexPath，但我希望它立即调用。

有谁能告诉我如何处理这个问题？

这是我的代码：

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    var cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! TimelineTableViewCell

    let motionImage:UIImage!
    motionImage = UIImage (named: "motion.png")


    if self.items[indexPath.row].image == nil
    {
        cell.snapshotImage.image = UIImage(named: "loading_page.png")
    }
    else
    {
        cell.snapshotImage.image = self.items[indexPath.row].image
    }
    cell.motionImage.image = motionImage
    cell.dayLabel.text = self.items[indexPath.row].text
    cell.timeLabel.text = self.items[indexPath.row].date

    //update the cell image
    if self.items[indexPath.row].image == nil
    {            
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)){

            //1. trying to get the image from cache
            var image: AnyObject? = timelineImageCache.objectForKey(userDefaults.stringForKey("cameraName")! + self.items[indexPath.row].fileID! + fileIdentifer)

            //2. trying to get the image from filesystem
            let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
            let folderPath = path.stringByAppendingPathComponent("timelineImage/")
            let destinationPath = folderPath.stringByAppendingPathComponent(userDefaults.stringForKey("cameraName")! + self.items[indexPath.row].fileID! + fileIdentifer + ".jpg")
            var fileManager = NSFileManager.defaultManager()
            if image == nil
            {
                if (fileManager.fileExistsAtPath(destinationPath))
                {
                    image = UIImage(contentsOfFile: destinationPath)
                    println("File System")
                }

            }

            //3. if there's no cache and not exist in file system, then download it
            if image == nil
            {
                image = WebstorageConnection.getVideoSnapshot(self.items[indexPath.row].fileID!)
                //imageCache[timeframe.fileID!] = image
                timelineImageCache.setObject(image!, forKey: userDefaults.stringForKey("cameraName")! + self.items[indexPath.row].fileID! + fileIdentifer)
                FileSystemManager.instance.saveImageToLoacl(image as! UIImage, fileName: userDefaults.stringForKey("cameraName")! + self.items[indexPath.row].fileID! + fileIdentifer)
                println("Done Download")
            }


            dispatch_async(dispatch_get_main_queue()){

                cell.snapshotImage.image = image as? UIImage
                //println("UI")
            }


        }


    }

    return cell

}


func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    println("You selected cell #\(indexPath.row)!")

    let url = WebstorageConnection.getDirectDownloadURL(fileID: items[indexPath.row].fileID!)
    vlcPlayer.stop()
    vlcLoadingIndicator.startAnimating()
    let media : VLCMedia = VLCMedia(URL: url) as VLCMedia
    vlcPlayer.media = media
    vlcPlayer.play()    

}

谢谢大家！

Answer 1

您要禁用didSelectRowAtIndexPath 3秒钟。玩完之后。正确的吗？

var isAllowed = Bool() // default is true

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    println("You selected cell #\(indexPath.row)!")

    let url = WebstorageConnection.getDirectDownloadURL(fileID: items[indexPath.row].fileID!)
    vlcPlayer.stop()
    vlcLoadingIndicator.startAnimating()
    let media : VLCMedia = VLCMedia(URL: url) as VLCMedia
    vlcPlayer.media = media
    vlcPlayer.play()

    isAllowed = false
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)){
        NSThread.sleepForTimeInterval(3) // sleeps for 3 sec.
        dispatch_async(dispatch_get_main_queue()){
            isAllowed = true
        }
    }
}

或使用计时器

var isAllowed = Bool() // default is true

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    println("You selected cell #\(indexPath.row)!")

    let url = WebstorageConnection.getDirectDownloadURL(fileID: items[indexPath.row].fileID!)
    vlcPlayer.stop()
    vlcLoadingIndicator.startAnimating()
    let media : VLCMedia = VLCMedia(URL: url) as VLCMedia
    vlcPlayer.media = media
    vlcPlayer.play()
    isAllowed = false

    var timer = NSTimer.scheduledTimerWithTimeInterval(3, target: self, selector: Selector("yourSelector"), userInfo: nil, repeats: false)
}

func yourSelector() {
    isAllowed = true
}

这将完成魔术并且不允许用户在indexPath ...

下选择单元格

func tableView(tableView: UITableView, willSelectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? 
{
    //return nil if you dont want to allow selection
    if (isAllowed == false)
    {
       return nil
    }
    return indexPath
}

播放流媒体

1 个答案: