这个是不是开发工具的问题，发布到预览都正常
相关文档
- wx.showLoading: 小程序/开发/API/界面/交互/wx.showLoading
- Function explaination: Mini Program/Development/Capabilities/Commercial capabilities/Mini Program alliance/Push client/Function explaination
- Function explaination: Mini Program/Development/Capabilities/Commercial capabilities/Mini Program alliance/Merchant end/Function explaination
- Union ticket: Mini Program/Development/Capabilities/Commercial capabilities/Mini Program alliance/Merchant end/Function explaination
- Order Data: Mini Program/Development/Capabilities/Commercial capabilities/Mini Program alliance/Merchant end/Function explaination
这个是api版本兼容问题，可以做一下自己的封装
showLoading:function() {if(wx.canIUse('showLoading')) {wx.showLoading({ title:'加载中...'});}else{wx.showToast({title:'加载中',icon:'loading'});}},closeLoading:function() {if(wx.canIUse('hideLoading')) {this.hideLoading();}else{wx.hideToast();}}