如何正确子类化 UIGestureRecognizer
我正在尝试实现文档中显示的复选标记示例，但我不能，因为编译器显示关于 [super TouchesMoved:touches withEvent:event] 调用的一堆警告，这是文档推荐的。
哪里有完整的示例来学习如何正确子类化以实现自定义手势？
I have gone through the documentation:
https://web.archive.org/web/20130309051214/http://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/GestureRecognizer_basics/GestureRecognizer_basics.html#//apple_ref/doc/uid/TP40009541-CH2-SW2
I am trying to implement the check mark example shown in the documentation and I can't because the compiler shows a bunch of warnings about the [super touchesMoved:touches withEvent:event] call, which is recommended by the documentation.
Where's the full example to learn how to correctly subclass for implementing a custom gesture?
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我发现以下WWDC 2010 会议视频非常有用：
要访问这些视频，您必须登录 https://developer.apple.com。
I found the following WWDC 2010 Session Videos extremely useful:
To access these videos you must login at https://developer.apple.com.