获取某个类的成员变量；

    unsigned int numIvars; //成员变量个数
    Ivar *vars = class_copyIvarList([UISearchBar class], &numIvars);
    NSString *key=nil;
    for(int i = 0; i < numIvars; i++) {
        Ivar thisIvar = vars[i];
        key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];  //获取成员变量的名字
        NSLog(@"variable name :%@", key);
        key = [NSString stringWithUTF8String:ivar_getTypeEncoding(thisIvar)]; //获取成员变量的数据类型
        NSLog(@"variable type :%@", key);
    }
    free(vars);

获取成员函数

 Method *meth = class_copyMethodList(NSClassFromString(@"UIView"), &numIvars);
    for(int i = 0; i < numIvars; i++) {
        Method thisIvar = meth[i];
        SEL sel = method_getName(thisIvar);
        const char *name = sel_getName(sel);
        NSLog(@"zp method :%s", name);
    }
    free(meth);