Uncaught TypeError: Cannot read property 'getContentSize' of null

[410162183 (疯火戏猪猴)]

自己写了个自定义的listview 但是不能滑动不知道为啥 鼠标滚轮转会报错Uncaught TypeError: Cannot read property ‘getContentSize’ of null

[410162183 (疯火戏猪猴)]

[410162183 (疯火戏猪猴)]

大神们 我需要你们

[atmy (S.H.I.E.L.D)]

用浏览器调试，看看是哪里出错了