Xcode 调试技巧:忽略警告(屏蔽clang warning)【1、全局/局部屏蔽的方法 2、忽略 CocoaPods 第三方库警告 3、clang/Lexer/Parser 警告清单】

本文详细介绍了在Xcode中如何管理和屏蔽clang警告,包括全局与局部忽略警告的策略,以及针对CocoaPods第三方库警告的处理方法。同时提供了clang警告、Lexer和Parser警告的清单,便于开发者快速查找和解决警告问题。

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前言

Xcode快速定位问题日志:在 Xcode Issue Navigator 里选择 “Reveal in Log”

在这里插入图片描述

有时候为了调试特定问题,可以选择忽略警告(比如忽略 CocoaPods 第三方库警告),本文并不是提倡你不要区关注clang warning

X-code编译器生成的警告与提示可确保正确的语法,并提供一些修改的建议:如符号的问题或格式字符串漏洞
例子: 进行NSArray的count判断
NSInteger和NSUInteger类型比较时,若传入一个负数则条件判断恒成立
在这里插入图片描述

- (void
stellaechen@STELLAECHEN-MC1 Python-2.7.13 % make ./python.exe -E -S -m sysconfig --generate-posix-vars ;\ if test $? -ne 0 ; then \ echo "generate-posix-vars failed" ; \ rm -f ./pybuilddir.txt ; \ exit 1 ; \ fi running build running build_ext building &#39;_Qt&#39; extension gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/stellaechen/download/Python-2.7.13/Mac/Include -I. -IInclude -I./Include -I/usr/local/include -I/Users/stellaechen/download/Python-2.7.13/Include -I/Users/stellaechen/download/Python-2.7.13 -c /Users/stellaechen/download/Python-2.7.13/Mac/Modules/qt/_Qtmodule.c -o build/temp.macosx-15.4-arm64-2.7/Users/stellaechen/download/Python-2.7.13/Mac/Modules/qt/_Qtmodule.o -Wno-deprecated-declarations error: unable to open output file &#39;build/temp.macosx-15.4-arm64-2.7/Users/stellaechen/download/Python-2.7.13/Mac/Modules/qt/_Qtmodule.o&#39;: &#39;Operation not permitted&#39; 1 error generated. building &#39;_tkinter&#39; extension gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -DWITH_APPINIT=1 -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tcl.framework/Versions/Current/PrivateHeaders -I/System/Library/Frameworks/Tk.framework/Headers -I/System/Library/Frameworks/Tk.framework/Versions/Current/PrivateHeaders -I/usr/X11R6/include -I/Users/stellaechen/download/Python-2.7.13/Mac/Include -I. -IInclude -I./Include -I/usr/local/include -I/Users/stellaechen/download/Python-2.7.13/Include -I/Users/stellaechen/download/Python-2.7.13 -c /Users/stellaechen/download/Python-2.7.13/Modules/_tkinter.c -o build/temp.macosx-15.4-arm64-2.7/Users/stellaechen/download/Python-2.7.13/Modules/_tkinter.o -framework Tk clang: warning: -framework Tk: &#39;linker&#39; input unused [-Wunused-command-line-argument] In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_tkinter.c:71: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/tk.h:86:11: fatal error: &#39;X11/Xlib.h&#39; file not found 86 | # include <X11/Xlib.h> | ^~~~~~~~~~~~ 1 error generated. building &#39;_ctypes&#39; extension gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I_ctypes/darwin -I/Users/stellaechen/download/Python-2.7.13/Mac/Include -I/Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include -I/Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/powerpc -I. -IInclude -I./Include -I/usr/local/include -I/Users/stellaechen/download/Python-2.7.13/Include -I/Users/stellaechen/download/Python-2.7.13 -c /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c -o build/temp.macosx-15.4-arm64-2.7/Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.o -DMACOSX In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c:113: /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:65:3: error: "Unsupported MacOS X CPU type" 65 | # error "Unsupported MacOS X CPU type" | ^ In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c:113: In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:73: /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffitarget.h:12:2: error: "Unsupported CPU type" 12 | #error "Unsupported CPU type" | ^ In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c:113: In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:74: /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/fficonfig.h:51:2: error: "Unknown CPU type" 51 | #error "Unknown CPU type" | ^ In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c:113: /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:171:5: error: unknown type name &#39;ffi_abi&#39; 171 | ffi_abi abi; | ^ /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:193:2: error: unknown type name &#39;ffi_sarg&#39; 193 | ffi_sarg sint; | ^ /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:194:2: error: unknown type name &#39;ffi_arg&#39; 194 | ffi_arg uint; | ^ /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/libffi_osx/include/ffi.h:307:11: error: unknown type name &#39;ffi_abi&#39; 307 | ffi_abi abi, | ^ In file included from /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/_ctypes.c:129: /Users/stellaechen/download/Python-2.7.13/Modules/_ctypes/ctypes.h:99:5: error: unknown type name &#39;ffi_closure&#39; 99 | ffi_closure *pcl_write; /* the C callable, writeable */ | ^ 8 errors generated. Python build finished, but the necessary bits to build these modules were not found: _bsddb _curses _curses_panel _sqlite3 _ssl bsddb185 bz2 dbm dl gdbm imageop linuxaudiodev nis ossaudiodev readline spwd sunaudiodev zlib To find the necessary bits, look in setup.py in detect_modules() for the module&#39;s name. Failed to build these modules: _ctypes _Qt _tkinter running build_scripts stellaechen@STELLAECHEN-MC1 Python-2.7.13 % make install /usr/bin/install -c python.exe /usr/local/bin/python2.7 install: /usr/local/bin/INS@20xsco: Permission denied make: *** [altbininstall] Error 71 stellaechen@STELLAECHEN-MC1 Python-2.7.13 %
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