定義：將一個(gè)產(chǎn)品的內(nèi)部表象與產(chǎn)品的生成過(guò)程分割開(kāi)來(lái)，從而可以使一個(gè)建造過(guò)程生成具有不同的內(nèi)部表象的產(chǎn)品對(duì)象。

類型：對(duì)象創(chuàng)建

類圖：

#import <Foundation/Foundation.h>
@interface Character : NSObject @property(nonatomic, assign)float protection; @property(nonatomic, assign)float power; @property(nonatomic, assign)float strength; @property(nonatomic, assign)float stamina; @property(nonatomic, assign)float intelligence; @property(nonatomic, assign)float agility; @property(nonatomic, assign)float aggressiveness; @end #import "Character.h"@implementation Character- (instancetype)init{if (self = [super init]) {_protection = 1.0;_power = 1.0;_strength = 1.0;_stamina = 1.0;_intelligence = 1.0;_agility = 1.0;_aggressiveness = 1.0;}return self; }@end #import <Foundation/Foundation.h> #import "Character.h"@interface CharacterBuilder : NSObject{Character * _character; } @property(nonatomic, readonly)Character *character;- (CharacterBuilder *)buildNewCharacter; - (CharacterBuilder *)builStrength:(float)value; @end #import "CharacterBuilder.h"@implementation CharacterBuilder- (CharacterBuilder *)buildNewCharacter{_character = [[Character alloc]init];return self; } - (CharacterBuilder *)builStrength:(float)value{_character.strength = value;return self; }@end #import "CharacterBuilder.h"@interface StandardCharacterBuilder : CharacterBuilder@end #import "StandardCharacterBuilder.h"@implementation StandardCharacterBuilder- (CharacterBuilder *)builStrength:(float)value{_character.protection = value;_character.power = value;return [super builStrength:value]; }@end #import <Foundation/Foundation.h> #import "StandardCharacterBuilder.h"@interface ChasingGame : NSObject- (Character *)createPlayer:(CharacterBuilder *)builder; - (Character *)createEnemy:(CharacterBuilder *)builder;@end #import "ChasingGame.h"@implementation ChasingGame- (Character *)createPlayer:(CharacterBuilder *)builder{[builder buildNewCharacter];[builder builStrength:50.0];return [builder character]; }- (Character *)createEnemy:(CharacterBuilder *)builder{[builder buildNewCharacter];[builder builStrength:80.0];return [builder character]; }@end

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轉(zhuǎn)載于:https://www.cnblogs.com/muzijun/p/5749750.html

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