Warning: Cannot update during an existing state transition (such as within `rend 蜗速前进ing 2021-07-26 513 阅读1分钟 当运行react文件的时候，如果代码写的不规范，就容易报以下错误 Warning: Cannot update during an existing state transition (such as within render). Render methods 原因：在render的时候使用setState()方法改变了state，它应该是一个纯的函数，不应该在这个方法当中去改变state
