如何访问和一个OBJ-C应用程序中使用dylib？

问题描述

我做了一个包含以下code进行dylib：

I've made a dylib that contains the following code:

    Test.h:

#import <Cocoa/Cocoa.h>
@interface Test : NSObject {
     int number;
}
-(void)beep;
-(void)giveInt:(int)num;
-(int)takeInt;

@end


Test.m:

#import "Test.h"

@implementation Test

-(void)beep {
     NSBeep();
}
-(void)giveInt:(int)num {
     number = num;
}
-(int)takeInt {
     return number;
}

@end

我编译dylib并把它放在另一个项目，但我似乎无法弄清楚如何从dylib进行测试对象，并调用一些方法。

任何人都知道如何做到这一点？

谢谢，

马特

I've compiled the dylib and put it in another project but I can't seem to figure out how to make a Test object from the dylib and call some of the methods.
Anyone know how to do this?
Thanks,
Matt

推荐答案

仅供参考：动态库在运行时加载。如果你不需要加载code动态，静态链接

Just fyi: Dynamic libraries are loaded at runtime. If you don't need to load code dynamically, link statically.

总之：

#import "test.h"
#include <dlfcn.h>

int main(int argc, const char *argv) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    void *handle = dlopen("test.dylib", RTLD_LAZY);
    id t = [[NSClassFromString(@"Test") alloc] init];

    [t beep];
    [t release];

    dlclose(handle);
    [pool drain];
}

您会想加入一些错误检查，但是这是基本的想法。如果你想使用一个NSBundle（可能是更正确的根据具体情况，请参阅)

You'll want to include some error checking, but that's the basic idea. If you want to use NSBundle (which may be more "proper" depending on the circumstances, see http://developer.apple.com/library/mac/#documentation/CoreFoundation/Conceptual/CFBundles/AccessingaBundlesContents/AccessingaBundlesContents.html)

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