wepy项目中使用Promise

• 进入项目根目录，安装polyfill

npm install wepy-async-function --save

• 在app.wpy中引入polyfill

import 'wepy-async-function'; 

• 在app.wpy中使API promise化

export default class extends wepy.app {

    constructor () {
        super();
        this.use('promisify');
    }

}

官网https://github.com/Tencent/wepy/wiki/wepy%E9%A1%B9%E7%9B%AE%E4%B8%AD%E4%BD%BF%E7%94%A8Promise