Xcode控制台po

https://www.jianshu.com/p/028ae4a39ca5

1. 打印框架结构_printHierarchy

• OC

po [[[UIWindow keyWindow] rootViewController] _printHierarchy]

• swift

expression -l objc++ -o -- [[[UIWindow keyWindow] rootViewController] _printHierarchy]

2. 打印界面view的信息recursiveDescription

• OC

po [[[UIApplication sharedApplication] keyWindow] recursiveDescription]

• swift

expr -l objc++ -O -- [[[UIApplication sharedApplication] keyWindow] recursiveDescription]