[NSThread callStackSymbols] 堆栈信息，获取方法执行的类和顺序-优快云博客

本文链接：https://blog.youkuaiyun.com/csdndimo/article/details/80479531

本文解析了一个iOS应用的方法调用栈，展示了从viewControllerWillAppear到GXJAFNetworkingPOST请求的具体调用过程。通过LLDB调试工具，揭示了iOS应用网络请求的内部实现。

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(lldb) po csss
<_NSCallStackArray 0x1c0643ff0>(
0   iOSGeneral                          0x00000001011e3514 +[GXJAFNetworking POST:parameters:success:failure:showDefaultErrMsg:] + 1708,
1   iOSGeneral                          0x00000001011e2e10 +[GXJAFNetworking POST:parameters:success:failure:] + 188,
2   iOSGeneral                          0x000000010121880c -[MyViewController loadData] + 236,
3   iOSGeneral                          0x0000000101218714 -[MyViewController viewWillAppear:] + 308,
4   UIKit                               0x000000018d4726d8 <redacted> + 616,
5   UIKit                               0x000000018d472448 <redacted> + 140,
6   UIKit                               0x000000018d4a05b8 <redacted> + 784,
7   UIKit                               0x000000018d49fc90 <redacted> + 1164,
8   UIKit                               0x000000018d49f720 <redacted> + 164,
9   UIKit                               0x000000018d493424 <redacted> + 188,
10  UIKit                               0x000000018d3eb770 <redacted> + 1420,
11  QuartzCore                          0x000000018798d25c <redacted> + 184,
12  QuartzCore                          0x00000001879913ec <redacted> + 324,
13  QuartzCore                          0x00000001878fdaa0 <redacted> + 320,
14  QuartzCore                          0x00000001879255d0 <redacted> + 580,
15  QuartzCore                          0x0000000187926450 <redacted> + 92,
16  CoreFoundation                      0x00000001837be910 <redacted> + 32,
17  CoreFoundation                      0x00000001837bc238 <redacted> + 412,
18  CoreFoundation                      0x00000001837bc884 <redacted> + 1436,
19  CoreFoundation                      0x00000001836dcda8 CFRunLoopRunSpecific + 552,
20  GraphicsServices                    0x00000001856bf020 GSEventRunModal + 100,
21  UIKit                               0x000000018d6bd78c UIApplicationMain + 236,
22  iOSGeneral                          0x0000000100f37634 main + 124,
23  libdyld.dylib                       0x000000018316dfc0 <redacted> + 4
)

(lldb)

NSArray *csss = [NSThread callStackSymbols];

然后断点po了一下这个csss，可以看到是在+[GXJAFNetworking POST:parameters:success:failure:showDefaultErrMsg:]这个方法中打印的，有四层方法调用，最初是在-[MyViewController viewWillAppear:]调用