小编OuS*_*uSS的帖子

当我启动应用程序有时我得到此错误,有时没有:

2017-11-10 14:00:37.119701+0000 XXX[768:176399] [DYGLInitPlatform] connection to host has failed: Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"
2017-11-10 14:00:37.123363+0000 XXX[768:176399] aborting: platform initialization failed
(lldb) 

什么可能导致这个问题？

图表,这是我的代码:

private func setChart(pieChartView: PieChartView, values: [Double]) {

    var dataEntries: [PieChartDataEntry] = []

    let dataPoints = ["Mar","Apr","May"]

    for i in 0..<dataPoints.count {
        let dataEntry = PieChartDataEntry(value: values[i], label: dataPoints[i])
        dataEntries.append(dataEntry)
    }

    let pieChartDataSet = PieChartDataSet(values: dataEntries, label: "")
    pieChartDataSet.colors = [UIColor(red: 47/255, green: 164/255, blue: 59/255, alpha: 1.0),UIColor(red: 17/255, green: 128/255, blue: 127/255, alpha: 1.0),UIColor.orange]
    let pieChartData = PieChartData(dataSet: pieChartDataSet)
    pieChartView.data = pieChartData
    pieChartView.centerText = "Amount Spent"
    pieChartView.chartDescription?.text = ""
    pieChartView.usePercentValuesEnabled = true
    pieChartView.legend.horizontalAlignment = .center

}

如何在PieChart数据中添加"%"？NSNumberFormatter()不再可用

- - …

我的 Firestore 设置如下：

频道[集合] ----> 频道ID ---> 消息[集合] ---> 消息ID

我如何将 snapshotListener 添加到子集合 'Messages' ？

  Firestore.firestore().collection("Channels").document().collection("Messages").addSnapshotListener { (querySnapshot, error) in
        guard let snapshot = querySnapshot else {
            print("Error listening for channel updates: \(error?.localizedDescription ?? "No error")")
            return
        }

        snapshot.documentChanges.forEach { change in 
           print(change)
        }
    }

这对我不起作用

我使用MobileVLCKit,这是我的代码:

class CameraViewController: UIViewController,VLCMediaPlayerDelegate{

  var mediaPlayer = VLCMediaPlayer()

  override func viewDidLoad() {
    super.viewDidLoad()

    mediaPlayer.delegate = self
    let url = NSURL(string: "URL HERE")
    mediaPlayer.media = VLCMedia(URL: url!)
  }
}  

我想通过播放,暂停和计时器全屏打开VLC

谢谢,