Overview

VIPER McFlurry is a modern framework for implementing VIPER architecture in iOS application. It offers several tools and components that help either start new projects with VIPER or move from MVC.

Key Features

• The framework itself pushes you to implement a proper VIPER architecture,
• It provides an extremely nice and easy way to implement intermodule data transfer,
• Used in default Generamba template.

Usage

This example works only for Module with UIViewController as View. However, it's possible to use this approach even with UIView and UITableViewCell acting as View.

• Create Module input protocol for target module inherited from RamblerViperModuleInput:

@protocol SomeModuleInput <RamblerViperModuleInput>

- (void)moduleConfigurationMethod;

@end

• Make Presenter of target module conform to this protocol.
• Inject Presenter as moduleInput property of the view. You can skip this step if presenter is a view property with name "output".
• Add Segue from source module ViewController to target module ViewController.
• Inject Source ViewController into Source Router as property "transition handler".
• In Router method call transition handler to open target module with configuration during segue.

[[self.transitionHandler openModuleUsingSegue:SegueIdentifier]
    thenChainUsingBlock:^id<RamblerViperModuleOutput>(id<SomeModuleInput> moduleInput) {
        [moduleInput moduleConfigurationMethod];
        return nil;
    }];

Working with Module output

• Create Module output protocol for target module inherited from RamblerViperModuleOutput:

@protocol SomeModuleOutput <RamblerViperModuleOutput>

- (void)moduleConfigurationMethod;

@end

• Make source module presenter to conform to this protocol.
• Add to target module presenter method:

- (void)setModuleOutput:(id<RamblerViperModuleOutput>)moduleOutput;

• Return source module presenter from configuration block in router:

[[self.transitionHandler openModuleUsingSegue:SegueIdentifier]
    thenChainUsingBlock:^id<RamblerViperModuleOutput>(id<SomeModuleInput> moduleInput) {
        [moduleInput moduleConfigurationMethod];
        return sourceRouterPresenter; // Return of module output
    }];

Working with Module Factory

Module factory can be replaced with segues for most cases. Except you need to create complex module or nontrivial module instantiation logic.

• Use RamblerViperModuleFactory object as module fabric with Typhoon.
• Set definition Initializer to initWithStoryboard:andRestorationId:
  • First parameter is UIStoryboard instance,
  • Second parameter is RestorationID of ViewController.
• Typhoon will initialize module from ViewController.
• Inject this Factory into router.
• Call Transition Handler's method - openModuleUsingFactory:withTransitionBlock:.
• Second block is place where transition from one to another viewController/transitionHandler should be performed:

    [[self.transitionHandler openModuleUsingFactory:self.betaModuleFactory
                                withTransitionBlock:^(id <RamblerViperModuleTransitionHandlerProtocol> sourceModuleTransitionHandler,
                                        id <RamblerViperModuleTransitionHandlerProtocol> destinationModuleTransitionHandler) {

                                    UIViewController *sourceViewController = (id) sourceModuleTransitionHandler;
                                    UIViewController *destinationViewController = (id) destinationModuleTransitionHandler;

                                    [sourceViewController.navigationController pushViewController:destinationViewController
                                                                                         animated:YES];

                                }] thenChainUsingBlock:^id<RamblerViperModuleOutput>(id<RamblerModuleBetaInput> moduleInput) {
                                   [moduleInput configureWithExampleString:exampleString];
                                   return nil;
                               }];

• In example above one module is pushed to navigation stack of another module.
• Modules are linked with intermodule data transfer block.

Installation

Add to podfile

pod "ViperMcFlurry"

License

MIT

Authors

Rambler&Co team:

• Andrey Zarembo-Godzyatsky / a.zarembo-godyzatsky@rambler-co.ru
• Valery Popov / v.popov@rambler-co.ru
• Egor Tolstoy / e.tolstoy@rambler-co.ru