Block and Closures Posted on 2021-11-11 Edited on 2025-05-15 Views: 看能不能搞清楚为什么及它的原理，而不是记住怎么用😂 参考 Retain cycle on self with blocks I finally figured out weakSelf and strongSelf 参考文档比较有用，Understanding weak and strong in Objective C How blocks are implemented (and the consequences) Blocks and Closures in Objective-C