由《大话设计模式 - 代理模式》的OC和部分Swift的语言转义
代理模式
继上一篇《装饰模式》
- 代理模式
代理模式
小明追求小美，让小王去送各种礼物。
OC
// 代理接口
@interface GiveGift : NSObject
- (void)giveDolls;
- (void)giveFlowers;
- (void)giveChocolate;
@end
@implementation GiveGift
- (void)giveDolls {}
- (void)giveFlowers {}
- (void)giveChocolate {}
@end
// 被追求者类
@interface SchoolGirl : NSObject
@property (nonatomic, copy) NSString *name;
@end
@implementation SchoolGirl
@end
// 追求者类
@interface Pursuit : GiveGift
- (instancetype)pursuit:(SchoolGirl *)mm;
@end
@implementation Pursuit
{
SchoolGirl *_mm;
}
- (instancetype)pursuit:(SchoolGirl *)mm {
_mm = mm;
return self;
}
- (void)giveDolls {
NSLog(@"giveDolls");
}
- (void)giveFlowers {
NSLog(@"giveFlowers");
}
- (void)giveChocolate {
NSLog(@"giveChocolate");
}
@end
// 代理类
@interface Proxy : GiveGift
- (instancetype)proxy:(SchoolGirl *)mm;
@end
@implementation Proxy
{
Pursuit *_gg;
}
- (instancetype)proxy:(SchoolGirl *)mm {
_gg = [[Pursuit new] pursuit:mm];
return self;
}
- (void)giveChocolate {
[_gg giveChocolate];
}
- (void)giveFlowers {
[_gg giveFlowers];
}
- (void)giveDolls {
[_gg giveDolls];
}
@end
@interface ViewController3 ()
@end
@implementation ViewController3
- (void)viewDidLoad {
[super viewDidLoad];
SchoolGirl *jj = [SchoolGirl new];
jj.name = @"JJ";
Proxy *delegate = [[Proxy new] proxy:jj];
[delegate giveChocolate];
[delegate giveFlowers];
[delegate giveDolls];
}
@end
