iOS Run Loop, What Why When

https://prafullkumar77.medium.com/ios-run-loop-what-why-when-7febead400b7

Official documentation:

https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/RunLoopManagement/RunLoopManagement.html#//apple_ref/doc/uid/10000057i-CH16-SW1

簡單聊聊 iOS Run Loop

https://medium.com/@chengyang1380/%E7%B0%A1%E5%96%AE%E8%81%8A%E8%81%8A-ios-run-loop-a9204314b773

What is a RunLoop Anyway? Swift and iOS Guide

https://stevenpcurtis.medium.com/what-is-a-runloop-anyway-swift-and-ios-guide-aa574577331b#:~:text=A%20run%20loop%20keeps%20your,be%20called%20an%20event%20loop

比較RunLoop default mode & common mode:

https://stackoverflow.com/questions/7222449/nsdefaultrunloopmode-vs-nsrunloopcommonmodes