微信小程序——頁面滑動事件

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,     //滑動開始x軸位置  lastY: 0,     //滑動開始y軸位置  text: "沒有滑動",  currentGesture: 0, //標識手勢 }, //滑動移動事件 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 = ""  //左右方向滑動  if (Math.abs(tx) > Math.abs(ty)) {   if (tx < 0)    text = "向左滑動"   else if (tx > 0)    text = "向右滑動"  }  //上下方向滑動  else {   if (ty < 0)    text = "向上滑動"   else if (ty > 0)    text = "向下滑動"  }  //將當前坐標進行保存以進行下一次計算  this.data.lastX = currentX  this.data.lastY = currentY  this.setData({   text: text,  }); }, //滑動開始事件 handletouchtart: function (event) {  this.data.lastX = event.touches[0].pageX  this.data.lastY = event.touches[0].pageY }, //滑動結束事件 handletouchend: function (event) {  this.data.currentGesture = 0;  this.setData({   text: "沒有滑動",  }); },})

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