微信小程序（6）--获取屏幕宽度及弹窗滚动与页面滚动冲突

1.获取屏幕宽度，并赋值给view

<view class="ships-img" style="height:{{windowWidth}}px;"></view>

wx.getSystemInfo({
      success: function (res) {
        // console.log(res.windowWidth)  屏幕宽度
        that.setData({
          windowWidth: res.windowWidth
        })
      }
    }) 

2.最近遇到自定义弹窗滚动问题，当文本页面过长，同时自定义弹窗也过长，即两者都需要滚动的时候，想要自定义弹窗滚动却触发的是页面的滚动。

解决思路：在打开弹窗的时候，让页面不可滚动；关闭弹窗后，恢复页面滚动。

<scroll-view scroll-y="{{isScroll}}"> 
  <view class="rootView">
      <view wx:for="{{arrayData}}" wx:key="" bindtap="showDialog" data-statu="open" class="inBoxVIew">
        <text>{{item}}</text>
      </view>
      <!--测试弹窗-->  
      <view class="dialogbox" bindtap="showDialog" data-statu="close" wx:if="{{isDialogShow}}"></view>  
      <!--dialog-->
      <view class="dialog" wx:if="{{isDialogShow}}">
        <view class="windowTitle">
          <text style="font-size:24px;">我是弹窗</text>
        </view>
        <view wx:for="{{dialogData}}" class="windowTable">
            <text>{{item.name}}</text>
        </view>
      </view> 
  </view>
</scroll-view>

Page {
  position: absolute;
  font-size: 36rpx;
   100%;
  height: 100%;
  display: block;
  background: #fff;
} 

scroll-view {
   height: 100%; 
} 

.rootView{
  padding: 10rpx;
}

.inBoxVIew{
  padding:20rpx 0;
  text-align: center;
}

.dialogbox {  
   100%;  
  height: 100%;  
  position: fixed;  
  top: 0;  
  left: 0;  
  z-index: 1000;  
  background: rgba(0, 0, 0, 0.6);
  overflow: hidden;  
}
  
.dialog {
   80%;
  height: 50%;  
  position: fixed; 
  top:50%;
  left:50%;
  margin-top:-25%;
  margin-left:-40%;
  z-index: 1001;  
  background: #FAFAFA;
  border-radius: 3px;
  overflow-y: scroll;
}

.windowTable{
   98%;
  background: white;
  margin: 0 10rpx;
  padding:10rpx 0;
}

.windowTitle{
   100%;
  text-align: center;
}

Page({

  /**
   * 页面的初始数据
   */
  data: {
    arrayData: null,
    dialogData: null,
    isDialogShow: false,
    isScroll: true
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {

    //构建测试数据
    let data = new Array();
    let dialog = new Array();
    for (let i = 0; i < 25; i++) {
      data[i] = '点击我，测试' + i;
      dialog[i] = {
        name: '我是弹窗-' + i,
        isSelected: false
      };
    }
    this.setData({
      arrayData: data,
      dialogData: dialog
    });
  },

  /**
   * 显示、关闭弹窗
   */
  showDialog: function (e) {
    var currentStatu = e.currentTarget.dataset.statu;
    console.log('currentStatu:', currentStatu);
    //关闭  
    if (currentStatu == "close") {
      this.setData({
        isDialogShow: false,
        isScroll: true
      });
    }
    // 显示  
    if (currentStatu == "open") {
      this.setData({
        isDialogShow: true,
        isScroll: false
      });
    }
  },

})