持续调用Animation.translateY在真机上出现卡顿
之前使用scroll-view实现组件内部的滚动,但是因为canvas导致不得不使用cover-view,但是cover-view中不支持scroll-view,所以只能手写组件内部上下滚动,主要是解决手指上下拖动其内容。
但是因为监听touchmove导致不断更新Animation.translateY,在真机上测试出现非常严重的卡顿,到了无法忍受的地步,
代码略丑,如有想法可以提出
flootTouchStart: function (e){ // console.log(e.touches[0].clientY) this .setData({ floorTouchStart: e.touches[0] }) }, flootTouchMove: function (e) { // const flootTouchStartX = this.data.floorTouchStart.clinetX; const flootTouchStartY = this .data.floorTouchStart.clientY; // console.log(flootTouchStartY); // const flootMoveX = e.touches[0].clinetX; const floorMoveY = e.touches[0].clientY; let curMove = floorMoveY - flootTouchStartY; this .setData({ floorTouchStart: e.touches[0] }) if ( this .data.floorList.length > 5 ) { if ( this .data.floorMove > -( this .data.floorList.length - 5) * 32 && curMove < 0 ) { // 向下滚 // console.log(curMove); this .setData({ floorMove: curMove + this .data.floorMove }) } else if ( this .data.floorMove < 0 && curMove > 0) { // 向上滚 this .setData({ floorMove: curMove + this .data.floorMove }) } } console.log( 'xx' + curMove) this .floorAnimation.translateY( this .data.floorMove).step() this .setData({ floorAnimationData: this .floorAnimation.export() }) }, |
// index.wxml < cover-view class = 'chooseFloor' wx:if = "{{chooseFloorShow}}" catchtouchstart = 'flootTouchStart' catchtouchmove = 'flootTouchMove' > < cover-view animation = "{{floorAnimationData}}" class = 'inner-container' > < cover-view wx:for = "{{floorList}}" wx:key = "{{index}}" data-num = "{{index}}" class = 'floorItem {{curFloor == item?"curfloor": ""}}' bindtap = 'confirmFloor' > < cover-view >{{item}}</ cover-view > </ cover-view > </ cover-view > </ cover-view > |