微信小程序 实现动态显示和隐藏某个控件

<view> 
 <button bindtap="onChangeShowState">{{showView?'Click To Check IdleReason':'Click To Check MTStatus'}}</button> 
</view> 
<view class="{{showView?'bright789_view_show':'bright789_view_hide'}}"> 
 <canvas canvas-id="pieCanvas1" style="width:400px;height:280px;"></canvas> 
</view> 

Page({ 
 data: { 
  showView: true 
 }, 
 onLoad: function (options) { 
  // 生命周期函数--监听页面加载 
  showView: (options.showView == "true" ? true : false) 
 } 
 , onChangeShowState: function () { 
  var that = this; 
  that.setData({ 
   showView: (!that.data.showView) 
  }) 
 }, 
}) 

.bright789_view_hide{ 
 display: none; 
} 
.bright789_view_show{ 
 display: block; 
}