uniapp滑動操作

<view @touchmove="handletouchmove" @touchstart="handletouchstart" @touchend="handletouchend">
</view>

　　

data() {
        return {
            flag: 0,//1向左滑動,2向右滑動,3向上滑動 4向下滑動
                    text: '',//向哪里滑動
                    lastX: 0,
                    lastY: 0,
                    index:0
        }
               
}    

methods: {
        handletouchmove: function(event) {
            // console.log(event)
            if (this.flag !== 0) {
                return;
            }
            let currentX = event.changedTouches[0].pageX;
            let currentY = event.changedTouches[0].pageY;
            let tx = currentX - this.lastX;
            let ty = currentY - this.lastY;
            let text = '';
            this.mindex = -1;
            //左右方向滑動
            if (Math.abs(tx) > Math.abs(ty)) {
                if (tx < 0) {
                    text = '向左滑動';
                    this.flag = 1;
                //  this.getList();  //調用列表的方法
                } else if (tx > 0) {
                    text = '向右滑動';
                    this.flag = 2;
                }
            }
            //上下方向滑動
            else {
                if (ty < 0) {
                    text = '向上滑動';
                    this.flag = 3;
                //  this.getList();  //調用列表的方法
                } else if (ty > 0) {
                    text = '向下滑動';
                    this.flag = 4;
                }
            }

            //將當前坐標進行保存以進行下一次計算
            this.lastX = currentX;
            this.lastY = currentY;
            this.text = text;
        },
        handletouchstart: function(event) {
            // console.log(event)
            this.lastX = event.changedTouches[0].pageX;
            this.lastY = event.changedTouches[0].pageY;
        },
        handletouchend: function(event) {
            this.flag = 0;
            this.text = '沒有滑動';
        },
}