设计模式是程序提升的必备知识，这里说下iOS怎样实现抽象工厂设计模式。本文是看过oc编程之道这本的抽象工厂这章后写出的，假设不明确原理能够看看那本书。

TestView.h首先创建一个视图

//
//  TestView.h
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import <UIKit/UIKit.h>@interface TestView : UIView@end

TestView.m

//
//  TestView.m
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import "TestView.h"@implementation TestView- (id)initWithFrame:(CGRect)frame
{if (self = [super initWithFrame:frame]) {self.backgroundColor = [UIColor redColor];}return self;
}@end

接下来创建两个类TestFactory、TestBrandingFactory 当中TestFactory继承TestBrandingFactory。详细实现例如以下：

TestBrandingFactory.h

//
//  TestBrandingFactory.h
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>@interface TestBrandingFactory : NSObject+ (TestBrandingFactory *)factory;- (UIView *)createTestView:(CGRect)frame;@end

TestBrandingFactory.m

//
//  TestBrandingFactory.m
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import "TestBrandingFactory.h"
#import "TestFactory.h"@implementation TestBrandingFactory+ (TestBrandingFactory *) factory
{return [[TestFactory alloc] init];
}- (UIView *) createTestView:(CGRect)frame
{return nil;
}@end

TestFactory.h

//
//  TestFactory.h
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import "TestBrandingFactory.h"@interface TestFactory : TestBrandingFactory@end

TestFactory.m

//
//  TestFactory.m
//  AbstractFactory
//
//  Created by 杜甲 on 11/10/14.
//  Copyright (c) 2014 杜甲. All rights reserved.
//#import "TestFactory.h"
#import "TestView.h"@implementation TestFactory- (UIView *)createTestView:(CGRect)frame
{return [[TestView alloc] initWithFrame:frame];
}@end

最后贴出实现

 TestBrandingFactory * tmp = [TestBrandingFactory factory];UIView *v = [tmp createTestView:CGRectMake(50, 110, 100, 50)];[self.view addSubview:v];