iOS设计模式 - 简单工厂

iOS设计模式 - 简单工厂

原理图

说明

1. 工厂类以及其实例化出来的子类都不是抽象类,所以称之为简单工厂(制造者与产品都是具体的实现类)

2. 简单工厂灵活性较差,但其简单直白的特性,适用于层级结构简单的场景

源码

https://github.com/YouXianMing/iOS-Design-Patterns

//
//  DeviceCreator.h
//  FactoryPattern
//
//  Created by YouXianMing on 15/7/29.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "DeviceProtocol.h"
#import "iPhoneDevice.h"
#import "AndroidDevice.h"
#import "WindowsDevice.h"

typedef enum : NSUInteger {
    
    kAndroid,
    kiPhone,
    kWindows,
    
} DeviceType;

@interface DeviceCreator : NSObject

/**
 *  根据标签创建手机
 *
 *  @param deviceType 手机标签
 *
 *  @return 对应的手机
 */
+ (BaseDevice *)deviceCreatorWithDeviceType:(DeviceType)deviceType;

@end

//
//  DeviceCreator.m
//  FactoryPattern
//
//  Created by YouXianMing on 15/7/29.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "DeviceCreator.h"
#import "BaseDevice.h"

@implementation DeviceCreator

+ (BaseDevice *)deviceCreatorWithDeviceType:(DeviceType)deviceType {

    if (deviceType == kiPhone) {
        
        return [iPhoneDevice new];
        
    } else if (deviceType == kAndroid) {
    
        return [AndroidDevice new];
        
    } else if (deviceType == kWindows) {
    
        return [WindowsDevice new];
        
    } else {
    
        return [BaseDevice new];
    }
}

@end

//
//  BaseDevice.h
//  FactoryPattern
//
//  Created by YouXianMing on 15/7/29.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "DeviceProtocol.h"

@interface BaseDevice : NSObject <DeviceProtocol>

@end

//
//  BaseDevice.m
//  FactoryPattern
//
//  Created by YouXianMing on 15/7/29.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//

#import "BaseDevice.h"

@implementation BaseDevice

- (void)phoneCall {

    NSLog(@"... BaseDevice ...");
}

- (NSString *)systemInfomation {

    return @"BaseDevice";
}

@end

分析

具体的制造者与具体的子类

关系伦理图