微信小程序使用catch:touchstart会导致子元素bind:tap事件无法运行

在我们使用catch:touchstart时，是可以阻止遮罩层后的页面滚动，但是又带来另一个问题，就是子元素的事件失效，以点击事件举例：

使用catch:touchstart的代码

 1 <view class="Mselect" catch:touchstart="prohibit">

 2         <view class="left_image">
 3             <image src="../../images/shoping.png">image>
 4         view>
 5         <view class="text_content">
 6             <view style="color:#FF5656">{{'￥509-699'}}view>
 7             <view style="color:#9a9a9a;font-size:20rpx">{{'请选择颜色 净含量'}}view>
 8         view>
 9         
10         <view class="select_color">
11             <view class="goods_title">颜色view>
12             <view class="goods_grid">
13                 <view bind:tap="fn">红色view>
14                 <view>白色view>
15                 <view class="select_text">黑色view>
16             view>
17         view>
18         
19         <view class="goods_net select_color">
20             <view class="goods_title">净含量view>
21             <view class="goods_grid">
22                 <view>36mlview>
23                 <view class="select_text">90mlview>
24             view>
25         view>
26         
27         <view class="goods_num select_color">
28             <view class="goods_title">数量view>
29             <view class="num">
30                 <text class="numreduce">-text>
31                 <text class="block">{{2}}text>
32                 <text class="numreduce numplus">+text>
33             view>
34         view>
35         <view class="typeedit">
36             <view>加入购物车view>
37             <view>立即购买view>
38         view>
39     view>

此时就会出现无论点击子元素什么地方都会出现 // 这是我自己写的方法

 那么只需要修改一行代码就能运行

只需要在父元素上更改事件即可解决

bind:touchstart catch:touchmove bind:touchend

 1 <view class="Mselect" bind:touchstart catch:touchmove bind:touchend>
 2         <view class="left_image">
 3             <image src="../../images/shoping.png">image>
 4         view>
 5         <view class="text_content">
 6             <view style="color:#FF5656">{{'￥509-699'}}view>
 7             <view style="color:#9a9a9a;font-size:20rpx">{{'请选择颜色 净含量'}}view>
 8         view>
 9         
10         <view class="select_color">
11             <view class="goods_title">颜色view>
12             <view class="goods_grid">
13                 <view bind:tap="fn">红色view>
14                 <view>白色view>
15                 <view class="select_text">黑色view>
16             view>
17         view>
18         
19         <view class="goods_net select_color">
20             <view class="goods_title">净含量view>
21             <view class="goods_grid">
22                 <view>36mlview>
23                 <view class="select_text">90mlview>
24             view>
25         view>
26         
27         <view class="goods_num select_color">
28             <view class="goods_title">数量view>
29             <view class="num">
30                 <text class="numreduce">-text>
31                 <text class="block">{{2}}text>
32                 <text class="numreduce numplus">+text>
33             view>
34         view>
35         <view class="typeedit">
36             <view>加入购物车view>
37             <view>立即购买view>
38         view>
39     view>

打印fn输出