wxml中：
switchTab:function() {
    wx.switchTab({
      url: '/pages/list/list'
    })
 }，
js中：
<button bindtap="switchTap">跳转到组件Tab页</button>
错误警告提示：
Component "pages/tapevent/tapevent" does not have a method "switchTap" to handle event "tap".