摘要： @interface DVITeacher : NSObject{ NSString *_name; NSInteger age;} @endDVITeacher *teacher = [[DVITeacher alloc] init];[teacher setValue: @"Zhangsan" forKey:@"name"];NSString *name = [teacher valueForKey:@"name"];@interface DVIClass : NSObject{ DVIPerson *_teacher; NSAr 阅读全文