Is it possible to extend the gesture handler?

[akeskiner]

Hi,
I want to add additional behaviour to built in gesture handlers. Is that possible? For example when there is a UIPanGesture, I want to zoom out while I'm scrolling through the chart.

lineChartView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(handleGesture)))

If I add a gesture recognizer like this, it conflicts with scrolling behaviour.
Thanks.

[aelam]

You can add a view above the chart, do whatever you want Since the gesture behaviors in chart is not meet my requirements, I did so

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在 2017年5月8日，下午10:00，Arda Keskiner ***@***.***> 写道： Hi, I want to add additional behaviour to built in gesture handlers. Is that possible? For example when there is a UIPanGesture, I want to zoom out while I'm scrolling through the chart. lineChartView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(handleGesture))) If I add a gesture recognizer like this, it conflicts with scrolling behaviour. Thanks. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

[akeskiner]

I see, but I still have the problem of not having both recognizers (chart's recognizer and mine).

The code I have is:

let additionalView = UIView(frame: self.lineChartView.frame)
additionalView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(handleGesture)))

self.view.addSubview(additionalView)

[liuxuan30]

The gesture handler is fileprivate, so you can provide your own for sure. Just rebind to the handler in your sub class. It's intended to be private a long time ago, so you can use your own, or you can modify the source code as well.