Question

我的视图宽度是设备屏幕的两倍，并且具有向左或向右移动视图的滑动手势识别器。但我已经意识到，如果在最初离屏的视图部分上执行滑动，视图将不会执行手势操作。

private void DoWork(IProgress<ProgressState> progress)
{
  IsAnalyzing = true;
  progress.Report(new ProgressState(0, "Processing..."));

  int count = File.ReadLines(memoryFile).Count();
  StreamReader reader = new StreamReader(memoryFile);
  string line = "";
  int lineIndex = 0;
  while ((line = reader.ReadLine()) != null)
  {
    progress.Report(new ProgressState((int)(((double)lineIndex / count) * 100.0d));

    //Process record... (assume time consuming operation)
    HexRecord record = HexFileUtil.ParseLine(line);

    lineIndex++;
  }
  progress.Report(new ProgressState(100, "Done."));
  IsAnalyzing = false;
}

...

ObservableProgress.CreateAsync<ProgressState>(progress => Task.Run(() => DoWork(progress)))
    .Sample(TimeSpan.FromMilliseconds(250)) // Update UI every 250ms
    .ObserveOn(this) // Apply progress updates on UI thread
    .Subscribe(p =>
    {
      Progress = p.ProgressPercentage;
      Task = p.Task;
    });

因此，向左滑动以查看视图的另一半（在屏幕外加载）后，我无法向右滑动。是否可以在屏幕外加载的位置执行手势？

编辑：所以经过一些修补，我发现在屏幕外加载的视图的任何位置都无法识别手势。因此，如果我移动视图以查看从屏幕外开始的50个像素，则不会在50个像素上识别手势。

Answer 1

我真的不明白你的答案，但希望这会有所帮助

所以我认为你的问题是

您声明滑动功能的方式是错误的。而不是func swipeLeft（）将其更改为func swipeLeft（sender：UISwipeGestureRecognizer）

或

问题可能在于您声明帧变量的方式。你可以在我的代码中查看更改后的内容。

为.code。

func swipeLeft(sender: UISwipeGestureRecognizer) {        
    // Moves masterView to the left equal to that of the width of the screen (or half of masterView's total width)
    let moveLeftFrame = CGRect(x: -view.frame.width, y: 0, width: masterView.frame.width, height: masterView.frame.height)

    UIView.animateKeyframes(withDuration: 0.5, delay: 0, options: .calculationModeCubic, animations: {
        UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 0.4, animations: {
            masterView.frame = moveLeftFrame
        })
    }, completion: { (true) in

    })
}

func swipeRight(sender: UISwipeGestureRecognizer) {        
    // Moves masterView back to original location
    let moveRightFrame = CGRect(x: 0, y: 0, width: masterView.frame.width, height: masterView.frame.height)

    UIView.animateKeyframes(withDuration: 0.5, delay: 0, options: .calculationModeCubic, animations: {
        UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 0.4, animations: {
            masterView.frame = moveRightFrame
        })
    }, completion: { (true) in

    })
}

将Gesture Recognizer添加到屏幕外的元素

1 个答案: