VENExperimentsManager enables easy definition, management and control of experiments within an iOS app including the following:

• Define experiments and 'experiment flag' code
• Allow users to turn experiments on and off
• Force turn-on or off experiments
• Make experiments user-editable or fixed
• Let users know whether experiments are 'stable' or 'unstable'

Usage

[VENExperimentsManager startExperimentsManagerWithPlistName:@"testExperiments"];

Then you can access experiments as follows..

VENExperiment *experiment = [VENExperimentsManager experimentWithIdentifier:VEN_EXPERIMENT_SOME_EXPERIMENT];

// Or if you just want to know if it's enabled
[VENExperimentsManager experimentIsEnabled:VEN_EXPERIMENT_SOME_EXPERIMENT];

Multi-option experiments (new in v0.2.0) can be used as follows..

NSString *selectedOptionForExperiment = [VENExperimentsManager selectedOptionForExperiment:VEN_EXPERIMENT_SOME_EXPERIMENT];

// Or you can get the experiment and inspect it..
VENExperiment *experiment = [VENExperimentsManager experimentWithIdentifier:VEN_EXPERIMENT_SOME_EXPERIMENT];

// Determine if the experiment has options
BOOL hasOptions = [experiment supportsOptions];

// Get the selected option
NSString *selectedOption = [experiment selectedOption];

// Get the readable description of the selected option
[experiment selectedOptionDescription];

The plist file defining experiments is a dictionary of experiment-identifier : experiment-definition dictionaries. It can be easily configured in XCode.

A sample experiments.plist file can be found in the Sample Application.

Key descriptions

VEN_EXPERIMENT_NAME : String - The name of the experiment as it will appear in the Settings view

VEN_EXPERIMENT_STABLE : Boolean - Whether the experiment is stable or not (grouped in Settings view)

VEN_EXPERIMENT_ENABLED : Boolean - The default enabled state for the experiment

VEN_EXPERIMENT_USER_EDITABLE : Boolean - Whether the user can change the state of the experiment

VEN_EXPERIMENT_FORCE_UPDATE : Boolean - If this is YES, the experiment will be force-moved to it's default state every open.

VEN_EXPERIMENT_OPTIONS : Dictionary - Key-Value pairs of KEY : Readable description for options for this experiment.

VEN_EXPERIMENT_DEFAULT_OPTION: String - The key of the default option in the dictionary of options

Experiment Settings View Controller

The library also contains a basic Experiment Settings View Controller which you can present to allow users to enable and disable experiments.

#import "VENExperimentsSettingsTVC.h"

...

VENExperimentsSettingsTVC *settingsTVC = [[VENExperimentsSettingsTVC alloc] init];
[self.navigationController pushViewController:settingsTVC animated:YES];

This will give an Experiment Settings screen that looks like this...

Contributing

We'd love to see your ideas for improving this library! The best way to contribute is by submitting a pull request. We'll do our best to respond to your patch as soon as possible. You can also submit a new Github issue if you find bugs or have questions.

Please make sure to follow our general coding style and add test coverage for new features!

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request