第45月第28天 加载so库 iOS打包framework

1.

- (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");
    }

https://www.jianshu.com/p/f931ff3b5d21

#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
");
 
    void *handler = dlopen("libtest.so", RTLD_NOW);

      printf("dlopen - %sn", dlerror());  

    assert(handler != NULL);
    
    void (*pTest)(int);
    pTest = (void (*)(int))dlsym(handler, "add");
    
    (*pTest)(10);
 
    dlclose(handler);
    
    printf("go out
");
    return 0;
}

编译so库

##### 在模拟器下编译
xcrun -sdk iphonesimulator clang -o libtest.so -shared -fPIC test.c

#在真机下编译
xcrun -sdk iphoneos clang -o libtest.so -shared -fPIC test.c

//gcc -o libtest.so -shared -fPIC test.c

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

https://blog.csdn.net/skwaityou/article/details/9098297

2.iOS打包framework

设置bitcode

开启bitcode的前提，第三方库，支持bitcode编译才行。

TARGETS->项目->Build Settings 搜索 other c flags 添加-fembed-bitcode

https://67zz.cn/archives/677