slider绑定bindtouchmove事件不执行 - WXOPEN Club

<slider bindchange="slider4change" min="0" max="100" block-size='16' value='{{progress}}' bindchange='progressChange' bindtouchmove='changing' bindtouchstart='changeFlag'/>

changing(){

console.log(222)

},

完全绑定不上这是咋回事啊，求大佬指教