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一名iOS菜鸟开发者，略懂Android，目前就职字节跳动。<br>QQ：441299296<br>交流群: 322671927<br>简书:<a href="https://www.jianshu.com/u/cd648456ae0d" target="_blank">http://www.jianshu.com/u/cd648456ae0d</a><br>github:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fgithub.com%2FTheBloodElf" target="_blank">https://github.com/TheBloodElf</a><br>oschina:<a href="https://links.jianshu.com/go?to=http%3A%2F%2Fgit.oschina.net%2Fliyongshi.com" target="_blank">http://git.oschina.net/liyongshi.com</a><br>力扣:<a href="https://links.jianshu.com/go?to=https%3A%2F%2Fleetcode-cn.com%2Fthebloodelf%2F" target="_blank">https://leetcode-cn.com/thebloodelf/</a>
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iOS中static，const，extern相关的问题static static分两种情况，修饰局部变量和全局变量。我们首先要搞清楚生命周期和作用域的概念。生命周期：这个变量能存活多久，它所占用的内存什么时候分配，什么时候收回。...
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