k v c
pragma mark KVC---key value coding 键值编码
// kvc就是给类中的属性赋值
Teacher *tec = [[Teacher alloc]initWithName:@"liuxing" age:23 sex:@"M"];
NSLog(@"===%@",tec.name);
// 键值对赋值法
[tec setValue:@"w" forKey:@"sex"];
NSLog(@"%@",tec.sex);
// 通过key获取属性对应的值
[tec valueForKey:@"sex"];
NSLog(@"%@",tec.sex);
[tec setValue:@"zhansan" forKey:@"name"];
NSLog(@"%@",tec);
// 设置student属性的值
Student *stu = [[Student alloc]init];
[tec setValue:stu forKey:@"stu"];//属性名
stu.name = @"haha";
tec.student.name =@"haha";
// 通过路径赋值
[tec setValue:@"haha" forKeyPath:@"student.name"];//属性的路径
// 通过路径获取值
NSString *path= [tec valueForKeyPath:@"stu.name"];
//用字典来设置多个属性的值
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:@"name",@"liuxing",@"sex",@"M", nil];
[tec setValuesForKeysWithDictionary:dic];//常用的方法，这个方法我们要自己在.m中去实现
[tec setValue:@"123" forKey:@"name2"];
NSLog(@"字典获取值 = %@",tec);
