Animated top menu for UITableView / UICollectionView / UIScrollView written in Swift!

Made in Yalantis.

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use_frameworks!

pod 'Persei', '~> 4.0'

github "Yalantis/Persei" ~> 4.0

For application targets that do not support embedded frameworks, such as iOS 7, Persei can be integrated by including source files from the Persei folder directly, optionally wrapping the top-level types into struct Persei to simulate a namespace. Yes, this sucks.

1. Add Persei as a submodule by opening the Terminal, cd-ing into your top-level project directory, and entering the command git submodule add https://github.com/yalantis/Persei.git
2. Open the Persei folder, and drag Persei.xcodeproj into the file navigator of your app project.
3. In Xcode, navigate to the target configuration window by clicking on the blue project icon, and selecting the application target under the "Targets" heading in the sidebar.
4. Ensure that the deployment target of Persei.framework matches that of the application target.
5. In the tab bar at the top of that window, open the "Build Phases" panel.
6. Expand the "Target Dependencies" group, and add Persei.framework.
7. Expand the "Link Binary With Libraries" group, and add SideMenu.framework
8. Click on the + button at the top left of the panel and select "New Copy Files Phase". Rename this new phase to "Copy Frameworks", set the "Destination" to "Frameworks", and add Persei.framework.

import Persei

let menu = MenuView()    
tableView.addSubview(menu)

In order to set items you need to instantiate array of MenuItem:

let items = feedModes.map { mode: SomeYourCustomFeedMode -> MenuItem in
	return MenuItem(image: mode.image)
}

menu.items = items

You can specify selected item manually:

menu.selectedIndex = 3

Note, that selectedIndex declared as Int? and will be nil in case of menu.items = nil.

Also, you can implement MenuViewDelegate to be notified about selection change:

// during init
menu.delegate = self

// actual implementation
extension FeedViewController: MenuViewDelegate {
    func menu(menu: MenuView, didSelectItemAt index: Int) {
    	dataSource.mode = feedModes[index] // alter mode of dataSource

    	tableView.reload() // update tableView
    }
}

Menu can be reveal as a result of button tap:

func menuButtonSelected(sender: UIControl) {
	menu.revealed = !menu.revealed

	// or animated
	menu.setRevealed(true, animated: true)
}

Use contentViewGravity to control sticking behavior. There are 3 available options:

• Top: contentView sticked to the top position of the view
• Center: contentView is aligned to the middle of the streched view
• Bottom: contentView sticked to the bottom

MenuItem declares set of attributes, that allow you to customize appearance of items:

struct MenuItem {
    var image: UIImage // default image
    var highlightedImage: UIImage? // image used during selection

    var backgroundColor: UIColor // default background color
    var highlightedBackgroundColor: UIColor // background color used during selection

    var shadowColor: UIColor // color of bottom 2px shadow line
}

Also you're free to configure background of MenuView by utilizing backgroundColor or backgroundImage. Note, that image should be resizeable:

let menu = MenuView()
menu.backgroundImage = UIImage(named: "top_menu_background")

• Can I place the UIImageView instead?
• Sure! Just subclass / use StickyHeaderView directly. It offers layout, positioning and reveal control. All you have to do is to assign your custom view (animated nian-cat UIImageView) to contentView:

let headerView = StickyHeaderView()
let imageView = UIImageView(...)

headerView.contentView = imageView

Obviously, your custom view can have heigh different from default:

headerView.contentHeight = image.size.height

As well as control distance to trigger open/close of the header:

headerView.threshold = 0.5

Threshold is a float value from 0 to 1, specifies how much user needs to drag header for reveal.

We’d be really happy if you sent us links to your projects where you use our component. Just send an email to [email protected] And do let us know if you have any questions or suggestion regarding the animation.

P.S. We’re going to publish more awesomeness wrapped in code and a tutorial on how to make UI for iOS (Android) better than better. Stay tuned!

The MIT License (MIT)

Copyright © 2017 Yalantis

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.