Apr 16, 2018

Queues in GCD

Apr 9, 2018

After upgrading the system and Xcode, the running project often gets stuck and I can only force quit every time.

Apr 8, 2018

Take a look at the underlying implementation of the copy, strong, retain, atmoic, and nonatomic modifiers

Dec 4, 2017

Supervisor monitors the problem that nginx keeps restarting