运行时,动态获取对象身上的方法,协议属性等

1.运行时:在运行的时候,动态获取队形身上的方法,协议,属性,成员变量,可以将对象身上的方法给干掉,弄我们自己的方法

• OC 方法

-(NSArray *)class_copyIvarList{
    
    unsigned int count;
    //取类的成员变量class_copyIvarList  方法:class_copyMethodList,类的guan'l:class_copyPropertyList,类的协议class_copyProtocolList

  
  Ivar *ivarList =  class_copyIvarList(self.class, &count);
    
    NSMutableArray *mutable = [NSMutableArray array];
    for (int i = 0 ; i < count; i++) {
        //去ivarList的首地址
       Ivar name = ivarList[i];
        //属性名
      const char *proper =  ivar_getName(name);
//        类型
        const char *properType = ivar_getTypeEncoding(name);
        //属性名转换为utf8
        NSString *properName = [NSString stringWithUTF8String:proper];
        [mutable addObject:properName];
    }
    
    return mutable.copy;
    
}

• Swift方法

 class func printIvarList(clazz:AnyClass) -> [AnyObject]{
    
    var count : UInt32 = 0
    let ivars =  class_copyIvarList(clazz, &count)
    var names = [String]()
    for i in 0..<count{
    
        let ivar = ivars[Int(i)]
        //名字
        let name = ivar_getName(ivar)
        let nameString = String(CString: name, encoding: NSUTF8StringEncoding)
        names.append(nameString!)
        //类型
        let type = ivar_getTypeEncoding(ivar)
        let typeString = String(CString: type, encoding: NSUTF8StringEncoding)
        print("name=\(nameString ?? ""),type =\(typeString ?? "")")
    }
    return names
    }