- (void)viewDidLoad {

    [super viewDidLoad];

    Class KSObj = objc_allocateClassPair([NSObject class], "KSStudent", 0);

    class_addIvar(KSObj, "name", sizeof(NSString *), log2(sizeof(NSString *)), @encode(NSString *));

    SEL sel = sel_registerName("other:");

    Method method = class_getInstanceMethod([ViewController class], @selector(other:));

    class_addMethod(KSObj, sel, method_getImplementation(method), method_getTypeEncoding(method));

    objc_registerClassPair(KSObj);

    //开始使用

    id kkk = [KSObj new];

    //给name赋值

    [kkk setValue:@"jack"forKey:@"name"];

    //获取name

    Ivar iv = class_getInstanceVariable(KSObj, "name");

    NSString* name =object_getIvar(kkk, iv);

    NSLog(@"%@",name);

    [kkk other:name];

}

-(void)other:(NSString*)name{

    NSLog(@"%s ---- %@",__func__,name);

}