我不知道这是否可行,但如果是这样,语法将如何?
如果不可能,为什么不呢?
解决方法
您应该能够绑定到消息实现(IMP),它们只是具有两个隐藏参数的简单C函数,分别为id和SEL类型的self和_cmd.
编辑:刚刚测试了以下完整的例子,它似乎工作.
#include <stdio.h> #include <boost/bind.hpp> #include <Foundation/NSObject.h> @interface MyClass : NSObject { } -(int) doSomething:(int)arg; @end @implementation MyClass -(int) doSomething:(int)arg { printf("doSomething: self=0x%08x _cmd=0x%08x\n",self,_cmd); return arg + 1; } @end int main(void) { MyClass *myObj = [[MyClass alloc] init],*otherObj = [[MyClass alloc] init]; typedef int (*MyFunc)(id,SEL,int); SEL doSomething_sel = @selector(doSomething:); MyFunc doSomething_impl = (MyFunc)[myObj methodForSelector:doSomething_sel]; // bind self & _cmd arguments: // calls [myObj doSomething:x] int result = boost::bind(doSomething_impl,myObj,doSomething_sel,_1)(14); printf("result1: %d\n",result); // bind _cmd & arg: // calls [otherObj doSomething:3] result = boost::bind(doSomething_impl,_1,42)(otherObj); printf("result2: %d\n",result); return 0; }
用GNUstep编译为:
gcc objcbind.mm -o objcbind -I/usr/include/GNUstep -lobjc -lstdc++ -lgnustep-base
在Mac OS X上,编译为:
gcc objcbind.mm -o objcbind -framework Foundation -lstdc++
输出:
doSomething: self=0x01a85f70 _cmd=0x00602220 result1: 15 doSomething: self=0x01a83d70 _cmd=0x00602220 result2: 43