KVC笔记

@interface DVITeacher : NSObject
{
    NSString *_name;
    NSInteger age;
}    
@end

DVITeacher *teacher = [[DVITeacher alloc] init];
[teacher setValue: @"Zhangsan" forKey:@"name"];
NSString *name = [teacher valueForKey:@"name"];

@interface DVIClass : NSObject
{
    DVIPerson *_teacher;
    NSArray *_allTeachers;
}
@end

DVIClass *myClass = [[DVIClass alloc] init];
[myClass setValue: @"Lisi" forKeyPath: @"teacher.name"];
NSString *name = [myClass valueForKeyPath:@"teacher.name"];

NSArray *array = [NSArray arrayWithObjects:teacher];
[myClass setValue: array forKeyPath:@"allTeachers"];
NSArray *teachers = [myClass valueForKeyPath:@"allTeachers.name"];