JD Retail Technology
Mar 29, 2021 · Mobile Development
How iOS Touch Events Are Generated, Propagated, and Handled
This article explains how iOS generates a touch event, encapsulates it in UITouch and UIEvent objects, propagates it through UIApplication to the view hierarchy using hitTest and pointInside, and finally processes it via UIResponder methods and the responder chain.
TouchEventUIResponderUIView
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