转自：https://www.cnblogs.com/heron-yu/p/7244481.html
转自：http://blog.csdn.net/xiaochun365/article/details/69948578
bindtap元素绑定事件，父节点绑定事件会冒泡
catchtap不会冒泡，仅在当前元素触发
//wxml
<view class="view1" bindtap="view1"> <view class="view2" bindtap="view2"> <view class="view3" catchtap="view3"></view> </view> </view>
//js
Page({ data: { }, view1: function () { console.log("---view1 bindtap click") }, view2: function () { console.log("--view2 bindtap click") }, view3: function () { console.log("-view3 catchtap click ") } })
//点击view3
-view3 catchtap click
//点击view2
--view2 bindtap click
---view1 bindtap click
//点击view1
---view1 catchtap click
点击view1,因为是bindtap他会向父节点传递,因为他本身没有父节点所以只打印的view1 bindtap click
