Technology blog collection

mark Some good conclusions ！ Thanks for sharing.

 

gcd principle

https://www.jianshu.com/p/ea419f32a3a9

https://www.jianshu.com/p/a043da8424e8

FMDB

https://www.jianshu.com/p/3682795d3f38

https://www.jianshu.com/p/e5c6c21dd981

https://www.jianshu.com/p/7958d31c2a97

method_exchangeInplementations There may be problems ： Subclass interaction parent method .

https://www.jianshu.com/p/b5e28d402834

Off screen rendering

https://www.jianshu.com/p/cff0d1b3c915

https://www.jianshu.com/p/57e2ec17585b

CALayer UIView difference

https://www.jianshu.com/p/079e5cf0f014

Dictionary array underlying principle

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(kkk) name:kName object:obj]

1、name、object All is empty , You can receive all notifications from the system

2、name Not empty ,object empty , Can receive include name All the notices for

3、name empty ,object Not empty , Can receive include object All the notices for

4、name、object Not empty , Can only receive both name Contain, object The notice of

Named Table、Nameless Table、wildcard

https://blog.csdn.net/u012886093/article/details/90767481

 

OC dynamic ： Dynamic type 、 Dynamic binding method 、 Load classes dynamically

https://www.cnblogs.com/LifeTechnologySupporter/p/6774585.html

isEqual  hash Relationship

https://www.jianshu.com/p/915356e280fc

unicode

https://zhuanlan.zhihu.com/p/46216008

https://blog.csdn.net/hongsong673150343/article/details/88584753

Interprocess communication

https://blog.csdn.net/ONEDAY_789/article/details/72887374

https://blog.csdn.net/ypt523/article/details/79958188

 

Caton monitoring

https://www.jianshu.com/p/582b7ad7fe4d

dispatch_barrier_async   pthread_rwlock

https://www.jianshu.com/p/c86928ed8f0d

https://www.jianshu.com/p/9ed95082f256

 

Startup optimization

https://zhuanlan.zhihu.com/p/28600469

http://www.cocoachina.com/cms/wap.php?action=article&id=87111

Design patterns （ Examples of images ）

https://cloud.tencent.com/developer/column/5089

OC Swift Member variable permissions

https://www.jianshu.com/p/213867b7169c?utm_campaign=maleskine&utm_content=note&utm_medium=seo_notes&utm_source=recommendation

NSNotification principle

https://www.jianshu.com/p/4a44b9a15fe9

hitTest

https://www.jianshu.com/p/ef83a798121c