后台日志一直在报，而且是很多页面，整个项目中未使用onHide/model/getNetworkType这类api。

Cannot read property 'model' of undefined;at pages/index/index onHide function;at api getNetworkType success callback function

Cannot read property 'model' of undefined;at pages/detail/index onUnload function;at api getNetworkType success callback function

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