Xcode LLDB 调试Tips

1. 

bt -- 显示当前线程调用堆栈

2. 

e    -- 执行表达式，动态修改当前线程变量的值

3. 

frame variable    -- 打印当前堆栈所有变量值

4. 

expr -O --language objC -- 0x000000000    -- 打印当前内存地址内容

5. 

-- 打印视图层级结构

swift 3.0: po let sub = view.perform("recursiveDescription"); print(sub)
swift 2.0: po view.performSelector("recursiveDescription")
objective-c: [self.view recursiveDescription]
(转自： http://stackoverflow.com/questions/25900606/recursivedescription-method-in-swift)