# 底层

- [01.alloc与字节对齐](/wiki/ios/di-ceng/01.alloc-yu-zi-jie-dui-qi.md)
- [02.结构体内存对齐](/wiki/ios/di-ceng/02.-jie-gou-ti-nei-cun-dui-qi.md)
- [03.对象本质探究与isa](/wiki/ios/di-ceng/03.-dui-xiang-ben-zhi-tan-jiu-yu-isa.md)
- [04.ISA与Class](/wiki/ios/di-ceng/04.isa-yu-class.md)
- [05.深入探索Class的结构](/wiki/ios/di-ceng/05.-shen-ru-tan-suo-class-de-jie-gou.md)
- [06.WWDC20-runtime优化](/wiki/ios/di-ceng/06.wwdc20runtime-you-hua.md)
- [07.深入探究属性](/wiki/ios/di-ceng/07.-shu-xing.md)
- [08.isKindOfClass的底层实现](/wiki/ios/di-ceng/08.iskindofclass.md)
- [09.slowpath和fastpath](/wiki/ios/di-ceng/09.slowpath-and-fastpath.md)
- [10.Class-cache\_t](/wiki/ios/di-ceng/10.class-cache_t.md)
- [11.源码解读objc\_msgSend](/wiki/ios/di-ceng/11.runtime-objc_msgsend.md)
- [12.类的实现与初始化源码解读](/wiki/ios/di-ceng/12.-lei-de-shi-xian-yu-chu-shi-hua.md)
- [13.动态决议与消息转发](/wiki/ios/di-ceng/13.-dong-tai-jue-yi-yu-xiao-xi-zhuan-fa.md)
- [14.iOS应用启动（一）：dyld与main函数](/wiki/ios/di-ceng/14.ios-ying-yong-qi-dong-yi-dyldstart.md)
- [15.iOS应用启动（二）：环境配置与runtime初始化](/wiki/ios/di-ceng/15.ios-ying-yong-qi-dong-er-objcinit.md)
- [16.iOS应用启动（三）：镜像文件的读取和加载](/wiki/ios/di-ceng/16.ios-ying-yong-qi-dong-san-jing-xiang-wen-jian-de-du-qu-he-jia-zai.md)
- [17.iOS应用启动（四）：分类的加载](/wiki/ios/di-ceng/17.ios-ying-yong-qi-dong-si-fen-lei-de-jia-zai.md)
- [18.关联对象源码解析](/wiki/ios/di-ceng/18.-guan-lian-dui-xiang-yuan-ma-jie-xi.md)
- [19.MethodSwizzing方法交换的坑](/wiki/ios/di-ceng/19.methodswizzing-fang-fa-jiao-huan-de-keng.md)
- [20.详解KVC](/wiki/ios/di-ceng/20.-xiang-jie-kvc.md)
- [21.KVO几个被忽视的细节](/wiki/ios/di-ceng/21.kvo-ji-ge-bei-hu-shi-de-xi-jie.md)
- [22.KVO底层原理](/wiki/ios/di-ceng/22.kvo-di-ceng-yuan-li.md)
- [23.多线程原理与atomic](/wiki/ios/di-ceng/23.-duo-xian-cheng-yuan-li-yu-atomic.md)
- [24.任务与队列的几个面试题](/wiki/ios/di-ceng/24.-ren-wu-yu-dui-lie-de-ji-ge-mian-shi-ti.md)
- [25.dispatch\_once单例实现原理](/wiki/ios/di-ceng/25.dispatchonce-dan-li-shi-xian-yuan-li.md)
- [26.栅栏函数](/wiki/ios/di-ceng/26.-zha-lan-han-shu.md)
- [27.信号量](/wiki/ios/di-ceng/27.-xin-hao-liang.md)
- [28.锁｜性能分析](/wiki/ios/di-ceng/28.-suo-xing-neng-fen-xi.md)
- [29.锁｜@synchronized](/wiki/ios/di-ceng/29.-suo-synchronized.md)
- [30.锁｜递归锁](/wiki/ios/di-ceng/30.-suo-di-gui-suo.md)
- [31.锁｜NSConditionLock](/wiki/ios/di-ceng/31.-suo-nsconditionlock.md)
- [32.关于Block你所该知道的一切](/wiki/ios/di-ceng/32.block.md)