IOS design mode-Bridging

Source: Internet
Author: User

IOS design mode-Bridging

We recommend you refer to the OBJECTIVE-C design mode for learning design patterns.

When to use the Bridge Mode

1. Do not want to form a fixed binding relationship between the abstraction and its implementation (so that the implementation can be switched during runtime)

2. abstraction and its implementation should be able to be independently extended through subclass;

3. Modifying abstract implementations should not affect client code

4. if each implementation requires additional subclass to refine the abstraction, it is necessary to divide them into two parts.

5. share an implementation between multiple objects with different abstract Interfaces

 

The following code describes the design mode.

First, display the called code

 

//// ViewController. m // BridgeTest /// Created by qitmac000246 on 15/7/13. // Copyright (c) June 2015 dujia. all rights reserved. // # import ViewController. h # import TouchConsoleController. h # import GameBoyEmulator. h @ interface ViewController () @ end @ implementation ViewController-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // sub-function implementation GameBoyEmulator * gbe = [[GameBoyEmulator alloc] init]; // the function module calls TouchConsoleController * tcc = [[TouchConsoleController alloc] init]; [tcc setEmulator: gbe]; // specify the function object [tcc setCommand: kConsoleUp]; // Implementation}-(void) didReceiveMemoryWarning {[super didreceivemorywarning]; // Dispose of any resources that can be recreated .} @ end

ConsoleEmulator. h

 

 

/// ConsoleEmulator. h // BridgeTest /// Created by qitmac000246 on 15/7/14. // Copyright (c) February 22, 2015 dujia. All rights reserved. // # import
 
  
Typedef enum {kConsoleUp,} ConsoleType; // abstract parent class of the execution class @ interface ConsoleEmulator: NSObject // Abstract Public method-(void) loadInstructionsForCommand; @ end
 

ConsoleEmulator. m

 

 

#import ConsoleEmulator.h@implementation ConsoleEmulator- (void) loadInstructionsForCommand{        }@end
GameBoyEmulator. h

 

 

#import ConsoleEmulator.h@interface GameBoyEmulator : ConsoleEmulator@end

GameBoyEmulator. m

 

 

# Import GameBoyEmulator. h @ implementation GameBoyEmulator // sub-execution class-(void) loadInstructionsForCommand {NSLog (@ % s ,__ func _);} @ end

ConsoleController. h

 

 

# Import
 
  
# Import ConsoleEmulator. h @ interface ConsoleController: NSObject // define the abstract parent class of the execution class in the parent class of the controller @ property (nonatomic, strong) ConsoleEmulator * emulator; // Abstract Public call method-(void) setCommand :( ConsoleType) command; @ end
 

ConsoleController. m

 

 

#import ConsoleController.h@implementation ConsoleController- (void) setCommand:(ConsoleType)command{    [_emulator loadInstructionsForCommand];}@end

TouchConsoleController. h

 

 

# Import ConsoleController. h // controller subclass @ interface TouchConsoleController: ConsoleController-(void) up; @ end

TouchConsoleController. m

 

 

#import TouchConsoleController.h@implementation TouchConsoleController- (void) up{    [super setCommand:kConsoleUp];}@end


 

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.