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];