使用__attribute __DATA 将常量写入Mach-O文件
1、 attribute DATA 宏 #define ZL_PULGIN_DATA(sectname) __attribute((used, section("__DATA,"#sectname" "))) #define ZL_PULGIN(key,value) \ const char * k##key##_##value##_zl ZL_PULGIN_DATA(ZLABCEDFG) = ""#key":"#value""; //ZLABCEDFG 可以自由定义，但不能超过8个字符 2、在实现文件如 .m 中使用 ZL_PULGIN(hello,world) 3、在运行时读取 读取函数 #include <mach-o/getsect.h> #include <mach-o/loader.h> #include <mach-o/dyld.h> #include <dlfcn.h> #import <objc/runtime.h> #import <objc/message.h> static NSArray<NSString *>* BHReadConfiguration(const char *section) { NSMutableArray *configs = [NSMutableArray array]; Dl_info info; dladdr(BHReadConfiguration, &info); #ifndef __LP64__ // const struct mach_header *mhp = _dyld_get_image_header(0); // both works as below line const struct mach_header *mhp = (struct mach_header*)info.dli_fbase; unsigned long size = 0; uint32_t *memory = (uint32_t*)getsectiondata(mhp, "__DATA", section, & size); #else /* defined(__LP64__) */ const struct mach_header_64 *mhp = (struct mach_header_64*)info.dli_fbase; unsigned long size = 0; uint64_t *memory = (uint64_t*)getsectiondata(mhp, "__DATA", section, & size); #endif /* defined(__LP64__) */ for(int idx = 0; idx < size/sizeof(void*); ++idx){ char *string = (char*)memory[idx]; NSString *str = [NSString stringWithUTF8String:string]; if(!str)continue; if(str) [configs addObject:str]; } return configs; } 执行结果 ...