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在实际应用中,当某种手势被触发后,在用户没有放开鼠标或手指前,会一直识别为该手势。比如当用户触发左滑手势后,这时再向下滑动,仍要按照左滑手势来处理。 Page({ data: { lastX: 0, lastY: 0, text : "没有滑动", currentGesture: 0, }, handletouchmove: function(event) { console.log(event) if (this.data.currentGesture != 0){ return } let currentX = event.touches[0].pageX let currentY = event.touches[0].pageY let tx = currentX - this.data.lastX let ty = currentY - this.data.lastY let text = "" //左右方向滑动 if (Math.abs(tx) > Math.abs(ty)) { if (tx < 0) { text = "向左滑动" this.data.currentGesture = 1 } else if (tx > 0) { text = "向右滑动" this.data.currentGesture = 2 } } //上下方向滑动 else { if (ty < 0){ text = "向上滑动" this.data.currentGesture = 3 } else if (ty > 0) { text = "向下滑动" this.data.currentGesture = 4 } } //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, }); }, handletouchtart:function(event) { console.log(event) this.data.lastX = event.touches[0].pageX this.data.lastY = event.touches[0].pageY }, handletouchend:function(event) { console.log(event) this.data.currentGesture = 0 this.setData({ text : "没有滑动", }); }, })
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