希望把 project.config.json 的配置文件改为 project.config.js 因为在开发时要切换 dev prod 环境，而两个环境的 appid 又不一样，导致每次都需要修改两个地方，一个是 dev prod 环境变量，一个是 appid ，这样并不合理，希望改为 .js 方式，这样就可以修改一处就能切换 开发环境和线上环境。

- 当前 Bug 的表现（可附上截图） [图片] 用户反馈的日志： 2019-6-20 16:51:13 [log] wx.getSystemInfoSync api invoke 2019-6-20 16:51:13 [log] wx.getSystemInfoSync return 2019-6-20 16:51:13 [log] wx.getSystemInfo api invoke 2019-6-20 16:51:13 [log] wx.getSystemInfo success callback with msg getSystemInfo:ok 2019-6-20 16:51:13 [log] wx.getNetworkType api invoke 2019-6-20 16:51:13 [log] wx.getNetworkType success callback with msg getNetworkType:ok 2019-6-20 16:51:13 [log] wx.getUpdateManager api invoke 2019-6-20 16:51:13 [log] wx.getUpdateManager return 2019-6-20 16:51:13 [log] App onLaunch have been invoked 2019-6-20 16:51:13 [log] App onShow have been invoked 2019-6-20 16:51:13 [log] wx.getSystemInfoSync api invoke 2019-6-20 16:51:13 [log] wx.getSystemInfoSync return 2019-6-20 16:51:13 [log] wx.getSystemInfo api invoke 2019-6-20 16:51:13 [log] wx.getSystemInfo success callback with msg getSystemInfo:ok 2019-6-20 16:51:13 [log] wx.getSetting api invoke 2019-6-20 16:51:13 [log] page pages/index/index onLoad have been invoked 2019-6-20 16:51:13 [log] page pages/index/index onShow have been invoked 2019-6-20 16:51:13 [log] page pages/index/index onReady have been invoked 2019-6-20 16:51:13 [log] wx.getSetting success callback with msg getSetting:ok 2019-6-20 16:51:15 [log] wx.getNetworkType api invoke 2019-6-20 16:51:15 [log] wx.getNetworkType success callback with msg getNetworkType:ok 2019-6-20 16:51:15 [log] wx.onNetworkStatusChange api invoke 2019-6-20 16:51:26 [log] page pages/index/index onHide have been invoked 2019-6-20 16:51:26 [log] App onHide have been invoked 2019-6-20 16:51:28 [log] App onShow have been invoked 2019-6-20 16:51:28 [log] page pages/index/index onUnload have been invoked 2019-6-20 16:51:28 [log] wx.getSetting api invoke 2019-6-20 16:51:28 [log] page pages/index/index onLoad have been invoked 2019-6-20 16:51:28 [log] page pages/index/index onShow have been invoked 2019-6-20 16:51:28 [log] wx.getSetting success callback with msg getSetting:ok 2019-6-20 16:51:29 [log] page pages/index/index onReady have been invoked 2019-6-20 16:51:30 [log] page pages/index/index onHide have been invoked

只有iOS设备出现这个问题，关注公众号再取消关注 微信会自动返回到小程序首页，但是此时小程序首页上的button点击不了了