Peson *p = [Person alloc] init];
Person *p1 = [p1 alloc] init];
p1.name = @"Tom";
p1.age = 18;
Person *p2 = [Person alloc] init];
p2.name = @"Jack";
p2.age = 28;
//set 方法使用 KVC
[p setValue:@"Jim" forKeyPath:@"name"];
[p setValue:@"10" forKeyPath:@"age"]
//get方法
NNString *name = [p valueForKeyPath:@"name"];
int age = [[p valueForKeyPath:@"age"] intValue ];
//模型转字典
//后面穿的数组是我要转化为字典的所有的 key 值
NSDictionary *dict= [p dictionaryWithValuesForKeys:@[@"name",@"age"]];
NSLog(@"dict = %@",dict);
//多个数据模型的操作
NSArray *persons = @[p,p1,p2];
//取出 persons 数组里面所有的 person 对象那么属性的值
NSArray *names = [person valueForKeyPath:@"name"];
NSLog(@"name = %@",names);
//数据模型里的模型属性
Book *book = [Book alloc] init];
book.name = @"iOS 宝典";
p.book = book;
NSString *bookNM = p.book.name;
NSString *bookName = [p valueForKeyPath:@"book.name"];
NSString *bN = [p.book valueForKeyPath:@"name"];
NSLog(@"%@",bN);
