vue 使用

<div class="li" @touchstart="startEvent" @touchmove="moveEvent" @touchend="endEvent">
methods:{
startEvent(e){
    var touchesstart = e.targetTouches[0];
    this.start = {
        x: touchesstart.clientX, // 横坐标
        y: touchesstart.clientY // 纵坐标
    };        
}，
moveEvent(e){
    var touchesmove = e.changedTouches[0].clientX;
    this.delta = {
        x: touchesmove.clientX - this.start.x,
        y: touchesmove.clientY - this.start.y
    };        
}，
endEvent(e){
    var touchesend= e.changedTouches[0]
    this.enddelta = {
        x: touchesend.clientX - this.start.x,
        y: touchesend.clientY - this.start.y
    };
}