iOS设计模式 - 生成器

//
//  CarBuilder.h
//  BuilderPattern
//
//  Created by YouXianMing on 15/9/14.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface CarBuilder : NSObject {

NSMutableDictionary *_carInfo;
}

/**
*  汽车信息
*/
@property (nonatomic, strong, readonly) NSDictionary *car;

/**
*  建造轮子
*/
- (void)buildWheel;

/**
*  建造引擎
*/
- (void)buildEngine;

/**
*  构造外壳
*/
- (void)buildShell;

@end

//
//  CarBuilder.m
//  BuilderPattern
//
//  Created by YouXianMing on 15/9/14.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "CarBuilder.h"

@interface CarBuilder ()

@end

@implementation CarBuilder

- (instancetype)init {

self = [super init];
if (self) {

_carInfo = [[NSMutableDictionary alloc] init];
}
return self;
}

- (void)buildWheel {

_carInfo[@"wheel"] = @"normal_wheel";
}

- (void)buildEngine {

_carInfo[@"engine"] = @"normal_engine";
}

- (void)buildShell {

_carInfo[@"shell"] = @"normal_shell";
}

@synthesize car = _car;
- (NSDictionary *)car {

return [[NSDictionary alloc] initWithDictionary:_carInfo];
}

@end

//
//  BMWBuilder.h
//  BuilderPattern
//
//  Created by YouXianMing on 15/9/14.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "CarBuilder.h"

@interface BMWBuilder : CarBuilder

@end

//
//  BMWBuilder.m
//  BuilderPattern
//
//  Created by YouXianMing on 15/9/14.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "BMWBuilder.h"

@implementation BMWBuilder

- (void)buildWheel {

_carInfo[@"wheel"] = @"BMO_wheel";
}

- (void)buildEngine {

_carInfo[@"engine"] = @"BMO_engine";
}

- (void)buildShell {

_carInfo[@"shell"] = @"BMO_shell";
}

@end

//
//  ViewController.m
//  BuilderPattern
//
//  Created by YouXianMing on 15/9/14.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "ViewController.h"
#import "CarBuilder.h"
#import "BMWBuilder.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

CarBuilder *builder = [[CarBuilder alloc] init];
[builder buildEngine];
[builder buildShell];
[builder buildWheel];
NSLog(@"%@", builder.car);

CarBuilder *bmwBuilder = [[BMWBuilder alloc] init];
[bmwBuilder buildEngine];
[bmwBuilder buildShell];
[bmwBuilder buildWheel];
NSLog(@"%@", bmwBuilder.car);
}

@end