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Replace iOS7 app switcher view with your own customized card view.

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##What does it do? This simple class allows you to replace the default scaled down app interface in the iOS7 app switcher with your own customized card view.

It's a demo of the idea outlined in this blog post and is part of the upcoming ClockShots time tracking app.


default screen separator checked in screen


Make sure to also check out Adam Bell's post here. He describes many cool hacks (animations anyone?), some of which are waaay too awesome for the App Store, but would work if you are developing apps for internal use.

##How to use it?

If you want to play around, just dump MMAppSwitcher.h and MMAppSwitcher.m into your project or even simpler, use CocoaPods and add MMAppSwitcher to your Podfile:

pod 'MMAppSwitcher'

In the class that will be providing the card view:

#import "MMAppSwitcher.h"

Then set it as the data source:

[[MMAppSwitcher sharedInstance] setDataSource:self];

The protocol just has one single method that you need to implement:

-(UIView *)appSwitcher:(MMAppSwitcher *)appSwitcher viewForCardWithSize:(CGSize)size;

Whenever the app enters the background, your custom card view will be queried and added to your app's view hierarchy and subsequently presented in the app switcher. When the app is launched, the card view is automatically dismissed again.

If your app supports one of iOS7's background modes, you can refresh your card view by calling [[MMAppSwitcher sharedInstance] setNeedsUpdate] whenever your app is awoken for background work. For background fetch, that would for example be

- (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    [[MMAppSwitcher sharedInstance] setNeedsUpdate];
    completionHandler(UIBackgroundFetchResultNewData);
}

If your app supports push notifications, iOS7 now also allows you to send silent push notifications that will wake your app up, but keep it in the background. This should enable you to control card updates remotely (at least if you don't excessively do it and get throttled).

##Attribution

Thanks to the following designers and The Noun Project for unuglifying the demo with their awesome icons:

  • Box icon designed by Travis J. Lee from the Noun Project
  • Brief case icon designed by Al D
  • Clock icon designed by Travis Yunis

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Replace iOS7 app switcher view with your own customized card view.

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