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Positioning practice of react native What do we want when we talk about positioning? WGS-84 longitude and latitude (i.e. gps longitude and latitude) or GCJ-02 longitude and latitude (Chinese coordinate offset standard, which is applicable to Gaode and Tencent maps) or BD-09 longitude and latitude (Baidu coordinate offset standard, which is us ...

cleanup of React useEffect It can avoid problems such as memory leakage in applicationsCan optimize application performance Before starting this article, you should have a basic understanding of what useEffect is, including using it to obtain data. This article will explain the cleanup of useEffectHook, and I hope you can use it comfort ...