- (void)runtimePlay{
    // 获取音乐资源路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"rain" ofType:@"mp3"];
    // 加载库到当前运行程序
    void *lib = dlopen("/System/Library/Frameworks/AVFoundation.framework/AVFoundation", RTLD_LAZY);
    if (lib) {
        // 获取类名称
        Class playerClass = NSClassFromString(@"AVAudioPlayer");
        // 获取函数方法
        SEL selector = NSSelectorFromString(@"initWithData:error:");
        // 调用实例化对象方法
        _runtime_Player = [[playerClass alloc] performSelector:selector withObject:[NSData dataWithContentsOfFile:path] withObject:nil];
        // 获取函数方法
        selector = NSSelectorFromString(@"play");
        // 调用播放方法
        [_runtime_Player performSelector:selector];
        NSLog(@"动态加载播放");
    }

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dlfcn.h> /* 必须加这个头文件 */
#include <assert.h>
 
int main(int argc, char *argv[])
{
    printf("come in\n");
 
    void *handler = dlopen("libtest.so", RTLD_NOW);
    assert(handler != NULL);
    
    void (*pTest)(int);
    pTest = (void (*)(int))dlsym(handler, "add");
    
    (*pTest)(10);
 
    dlclose(handler);
    
    printf("go out\n");
    return 0;
}

#include <stdio.h>
 
#ifdef __cplusplus
extern "C"{
    
#endif
    
void add(int num)
{
    printf("*****************************************\n");
    printf("This is ok, the number is okay. %d\n", num);
    printf("*****************************************\n");
}
 
 
#ifdef __cplusplus
    }
    
#endif