KVC 就是键值编码(key-value-coding)
- 可以为似有属性赋值
Person *roy = [[Person alloc] initWithName:@"Roy" age:18 gender:GenderMan];
[roy introduce]; // 自我介绍,我的名字是 : Roy,年龄 : 18,性别 : 1
[roy setValue:@23 forKey:@"age"];
[roy introduce]; // 自我介绍,我的名字是 : Roy,年龄 : 23,性别 : 1
NSString *name = [roy valueForKey:@"name"];
NSLog(@"name - %@",name); // name - Roy
NSUInteger age = [[roy valueForKey:@"age"] integerValue];
NSLog(@"age - %lu",(unsigned long)age); // age - 23
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