微信小程序——页面滑动事件

wxml:

<view id="id" class = "ball" bindtap = "handletap" bindtouchstart = "handletouchtart" bindtouchmove="handletouchmove" bindtouchend="handletouchend" style = "width : 100%px; height : 40px;"> {{text}} </view>

wxss:

.ball { box-shadow:2px 2px 10px #AAA; border-radius: 20px; position: absolute; }

js:

//jsPage({ data: { lastX: 0, //滑动开始x轴位置 lastY: 0, //滑动开始y轴位置 text: "没有滑动", currentGesture: 0, //标识手势 }, //滑动移动事件 handletouchmove: function (event) { var currentX = event.touches[0].pageX var currentY = event.touches[0].pageY var tx = currentX - this.data.lastX var ty = currentY - this.data.lastY var text = "" //左右方向滑动 if (Math.abs(tx) > Math.abs(ty)) { if (tx < 0) text = "向左滑动" else if (tx > 0) text = "向右滑动" } //上下方向滑动 else { if (ty < 0) text = "向上滑动" else if (ty > 0) text = "向下滑动" } //将当前坐标进行保存以进行下一次计算 this.data.lastX = currentX this.data.lastY = currentY this.setData({ text: text, }); }, //滑动开始事件 handletouchtart: function (event) { this.data.lastX = event.touches[0].pageX this.data.lastY = event.touches[0].pageY }, //滑动结束事件 handletouchend: function (event) { this.data.currentGesture = 0; this.setData({ text: "没有滑动", }); },})

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