Month: August 2018

https://www.jianshu.com/p/b74e52e866fc https://www.jianshu.com/p/9cf65105364d https://blog.csdn.net/wzc10101415/article/details/80306728 https://blog.csdn.net/mydo/article/details/52808579 http://www.cocoachina.com/ios/20170810/20207.html

https://blog.csdn.net/xx326664162/article/details/48087709   快捷键 https://www.jianshu.com/p/4dd914b93555 https://www.cnblogs.com/exmyth/p/7530123.html xcode 代码格式化快捷键 首先选中 或 command A ，之后 control ＋ i 即可

http://www.dreamingwish.com/article/gcd-guide-dispatch-once-1.html

https://blog.csdn.net/shenjie12345678/article/details/44152605