weex-city在搜索框输入数据出现下面的警告 #382

用demo运行也报了这个warn
[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "sourceData"

found in

---> at D:\webstormWorkSpace\programmer-app\node_modules\weex-ui\packages\wxc-city\index.vue
at D:\webstormWorkSpace\programmer-app\src\components\City.vue