iOS设计模式 - 生成器

 

原理图

 

说明

生成器模式可以理解为零部件组装工厂,与工厂方法是非常相似的!

 

源码

////  VehicleBuilder.h//  BuilderPattern////  Created by YouXianMing on 15/8/18.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import 
     
      #import "VehicleBuilderProtocol.h"@interface VehicleBuilder : NSObject 
      
       /** *  车辆信息 */@property (nonatomic, strong) NSMutableDictionary *vehicleInfo;@end
      
     

////  VehicleBuilder.m//  BuilderPattern////  Created by YouXianMing on 15/8/18.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import "VehicleBuilder.h"@implementation VehicleBuilder- (instancetype)init {        self = [super init];    if (self) {            self.vehicleInfo = [NSMutableDictionary dictionary];    }        return self;}- (void)buildVehicleChassis {    [NSException raise:NSInternalInconsistencyException                format:@"对不起,您不能直接调用 '%@ %d' 中的方法 '%@',您需要通过继承其子类,在子类中重载该方法",     [NSString stringWithUTF8String:__FILE__].lastPathComponent, __LINE__, NSStringFromSelector(_cmd)];}- (void)buildVehicleEngine {    [NSException raise:NSInternalInconsistencyException                format:@"对不起,您不能直接调用 '%@ %d' 中的方法 '%@',您需要通过继承其子类,在子类中重载该方法",     [NSString stringWithUTF8String:__FILE__].lastPathComponent, __LINE__, NSStringFromSelector(_cmd)];}- (void)buildVehicleWheels {    [NSException raise:NSInternalInconsistencyException                format:@"对不起,您不能直接调用 '%@ %d' 中的方法 '%@',您需要通过继承其子类,在子类中重载该方法",     [NSString stringWithUTF8String:__FILE__].lastPathComponent, __LINE__, NSStringFromSelector(_cmd)];}- (void)buildVehicleDoors {    [NSException raise:NSInternalInconsistencyException                format:@"对不起,您不能直接调用 '%@ %d' 中的方法 '%@',您需要通过继承其子类,在子类中重载该方法",     [NSString stringWithUTF8String:__FILE__].lastPathComponent, __LINE__, NSStringFromSelector(_cmd)];}@end

////  VehicleBuilderProtocol.h//  BuilderPattern////  Created by YouXianMing on 15/8/18.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import 
     
      @protocol VehicleBuilderProtocol 
      
       @required/** *  制造汽车底盘 */- (void)buildVehicleChassis;/** *  制造汽车引擎 */- (void)buildVehicleEngine;/** *  制造汽车轮子 */- (void)buildVehicleWheels;/** *  制造汽车车门 */- (void)buildVehicleDoors;@end
      
     

////  VehicleAssemblyPlant.h//  BuilderPattern////  Created by YouXianMing on 15/8/18.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import 
     
      #import "VehicleBuilder.h"/** *  车辆装配工厂 */@interface VehicleAssemblyPlant : NSObject/** *  组装车辆 * *  @param vehicleBuilder 组装方案 * *  @return 组装好的车辆 */+ (VehicleBuilder *)vehicleAssembly:(VehicleBuilder *)vehicleBuilder;@end
     

////  VehicleAssemblyPlant.m//  BuilderPattern////  Created by YouXianMing on 15/8/18.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import "VehicleAssemblyPlant.h"@implementation VehicleAssemblyPlant+ (VehicleBuilder *)vehicleAssembly:(VehicleBuilder *)vehicleBuilder {    [vehicleBuilder buildVehicleChassis];    [vehicleBuilder buildVehicleDoors];    [vehicleBuilder buildVehicleEngine];    [vehicleBuilder buildVehicleWheels];        return vehicleBuilder;}@end

 

细节