iOS开发之UI基础--KVC

KVC
—— key value coding

1.字典转模型

//self.answer = dic[@"answer"];

//self.icon = dic[@"icon"];

//self.title = dic[@"title"];

//self.options = dic[@"options"];

//kvc 把字典中的值,赋给当前对象制定的属性(@"answer")[self setValue:dic[@"answer"]
forKeyPath:@"answer"];//遍历字典中所有的key,并把和对象属性对应的key 赋值[self
setValuesForKeysWithDictionary:dic];

2.KVC设置与取出值

BLPerson
*person = [[BLPerson
alloc]
init];

//kvc设置值

[person
setValue:@"zs"
forKeyPath:@"name"];

[person setValue:@18
forKeyPath:@"age"];

//kvc取值

[person
valueForKeyPath:@"name"];

[[person valueForKeyPath:@"age"]
intValue];//把对象转成字典,(可能要存储到plist中)

NSDictionary
*dic = [person
dictionaryWithValuesForKeys:@[@"name",@"age"]]

3.KVC与数组

BLPerson
*p1 = [[BLPerson
alloc]
init];p1.name
=
@"zs";

p1.age
=
18;

BLPerson
*p2 = [[BLPerson
alloc]
init];p2.name
=
@"ls";

p2.age
=
19;

BLPerson
*p3 = [[BLPerson
alloc]
init];p3.name
=
@"ww";

p3.age
=
16;

NSArray
*persons =
@[p1,p2,p3];//取出数组中所有人的名字

//方法1 循环 取出

//方法2

NSArray
*names = [persons
valueForKeyPath:@"name"];

4.KVC
多级KeyPath

BLPerson
*p1 = [[BLPerson
alloc]
init];

p1.name
=
@"zs";

p1.age
=
18;

BLBook
*book = [[BLBook
alloc]
init];

book.name
=
@"金瓶梅";

p1.book= book;

//根据person获取book的名字

//1

[p1.book
valueForKeyPath:@"name"];

//2

//NSString *name = p1.book.name;

//3 区分大小写

NSString
*name = [p1
valueForKeyPath:@"book.name"];