map组件点击坐标iconPath才会显示title，怎么能title它刚开始就显示出来

latitude: 30.2219800000,

longitude: 120.2115800000,

markers: [{

id: 0,

latitude: 30.2280653586,

longitude: 120.2180419597,

iconPath: '/img/zuobiao.png',

width: 30,

height: 30,

title: '坐标名称'

}],