iOS KVC/KVO

    Student *stu =     [stu setAge:= ;

間接的修改對象屬性

valueForKey: 和 setValue:ForKey: 是以字串的方式向對象發送訊息

 

 ******************************** <Foundation/Foundation.h>

 <Foundation/Foundation.h> age; 　　　　@property (nonatomic,copy) NSString *name;  @property (nonatomic,retain) Book *book; 　　- (

  - (*stu =    [stu setValue: forKey:*str = [stu valueForKey:];     [stu setValue:@ forKey:     age = [[stu valueForKey:] intValue]; ,str,age);     [stu @{:@,:    NSDictionary *dic = [stu :@[,,dic);     stu.book =
    [stu.book setPrice:];     [stu.book setValue:@ forKey:];     [stu setValue:@ forKeyPath:];     [stu.book setValue:@ forKeyPath:];   }

 

2.KVO (Key Value Observing)

實現方式：添加監聽器

 

 <Foundation/Foundation.h>*- (

  - (*stu =    [stu setValue: forKey:    Teacher *teacher =    [stu addObserver:teacher forKeyPath: options:NSKeyValueObservingOptionNew context:nil];     stu.name =     }

 <Foundation/Foundation.h>

  - ()observeValueForKeyPath:(NSString *)keyPath ofObject:() change:(NSDictionary *)change context:( *,keyPath);       NSLog(,);         NSLog(,change);     

 <Foundation/Foundation.h>  main( argc,   *        Student *stu =