小程序全局消息提示设置

msg (title,icon,time){
    //统一提示方便全局修改
    if(Boolean(title) === false){
      return;
    }
    wx.showToast({
      title:String(title),
      duration:time?time:2000,
      mask:true,
      icon:icon==0?'none':icon==1?'success':'loading'
    });
  },