小编gar*_*wer的帖子

我试图在Swift中添加标签,这些标签是在循环中添加的.然后我想在添加时为每个添加一个'TapGesture'事件.它可以工作,但问题是被调用的函数从标签中获取数据,以便在单击时使用,但标签已经被重新定义,然后它会从最后添加的数据中获取数据,而不是单击的数据.我怎样才能使每一个都独一无二？

self.label.attributedText = self.myMutableString
let tapGesture = UITapGestureRecognizer(target: self, action: handleTap(label))
self.label.userInteractionEnabled=true
self.label.addGestureRecognizer(tapGesture)
self.label.font = UIFont.boldSystemFontOfSize(28)
self.label.sizeToFit()
self.label.center = CGPoint(x: screenWidth, y: top)
if(kilom>=30||self.located==false){
    self.scroller.addSubview(self.label)
    if(device=="iPhone"||device=="iPhone Simulator"){
        top = top+80
    }
    else{
        top = top+140
    }
}

下面的代码是手势识别器,它获取标签数据并使用它:

func handleTap(sender:UILabel){
    var a = self.label.text
    let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

    let resultViewController = storyBoard.instantiateViewControllerWithIdentifier("displayer") 

    self.presentViewController(resultViewController, animated: true, completion: nil)
}

我在 Android Studio 的资产文件目录中可能有 wifi2.txt 文件。但是，当我尝试访问它时，我不断收到 NULLPointException。我的代码如下：（提前非常感谢）

             //CSV FILE READING
    File file = null;



    try {



        FileInputStream is = new FileInputStream(file);

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(getAssets().open("wifi2.txt")));
            String line;
            Log.e("Reader Stuff",reader.readLine());
            while ((line = reader.readLine()) != null) {
                Log.e("code",line);
                String[] RowData = line.split(",");
                LatLng centerXY = new LatLng(Double.valueOf(RowData[1]), Double.valueOf(RowData[2]));
                if (RowData.length == 4) {
                    mMap.addMarker(new MarkerOptions().position(centerXY).title(String.valueOf(RowData[0]) + String.valueOf(RowData[3])).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
                }

            }

        } catch (IOException ex) {
           ex.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
               e.printStackTrace(); …