📑 SHEET helps you easily create a wide variety of action sheets with navigation features used in the Flipboard App

Installation

CocoaPods

pod 'Sheet', '~> 0.7.0'

Carthage

github "ParkGwangBeom/Sheet" ~> 0.7.0

Manually

If you prefer not to use either of the aforementioned dependency managers, you can integrate Sheet into your project manually.

Usage

Implementing the contents of a Sheet is similar to implementing an existing UICollectionViewController. Simply make your view controller subclass of SheetContentsViewController.

import Sheet

class ViewController: SheetContentsViewController {

   /// Sheet visible contents height. If contentSize height is less than visibleContentsHeight, contentSize height is applied.
    override var visibleContentsHeight: CGFloat {
        return 600
    }
    
    /// Give CollectionView a chance to regulate Supplementray Element
    override func registCollectionElement() {
        let nib = UINib(nibName: "TitleHeaderView", bundle: nil)
        collectionView?.register(nib, forSupplementaryViewOfKind: SheetLayoutElement.header.kind, withReuseIdentifier: SheetLayoutElement.header.id)
    }

    /// Provide an opportunity to set default settings for collectionview custom layout
    override func setupSheetLayout(_ layout: SheetContentsLayout) {
        layout.settings.itemSize = { indexPath in
            let height: CGFloat = indexPath.section == 0 ? 30 : 60
            return CGSize(width: UIScreen.main.bounds.width, height: height)
        }
        layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 15, right: 0)
        layout.settings.headerSize = CGSize(width: UIScreen.main.bounds.width, height: 60)
        layout.settings.isHeaderStretchy = true
    }
    
   override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }
    
    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
         ...
        return cell
    }
    
    override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         ...
    }
   
     ...
}

You can use the custom action sheet transition using the default api provided by UIKit such as present, push, pop.

🔥 However, do not use the dismiss of the NavigationController, but use the close (duration: completion :) function.

// present
let contentsViewController = ViewController()
let sheetNavigation = SheetNavigationController(rootViewController: contentsViewController)
present(sheetNavigation, animated: true, completion: nil)

// push
let nextContentsViewController = NextContentsViewController()
navigationController?.pushViewController(nextContentsViewController, animated: true)

// pop
navigationController?.popViewController(animated: true)

See the Example project for more details.

Layout

Sheet basically has Navigation structure. All children should inherit from SheetContentsViewController. SheetContentsViewController inherits UICollectionViewController by default, and its layout is like the following image.

Please refer to Example Code for detailed setting of image layout.

Advanced

Easily customizable by SheetContents.

Options

Property	Type	Default Value
defaultToolBarBackgroundColor	UIColor	.black
sheetToolBarHeight	CGFloat	50
isSheetToolBarHidden	Bool	false
cornerRadius	CGFloat	0
defaultVisibleContentHeight	CGFloat	240
dimmingViewBackgroundColor	UIColor	.black.withAlphaComponent(0.3)
sheetBackgroundColor	UIColor	.white
presentTransitionType	SheetPresentTransitionType	.scale

Layout Settings

Property	Type
headerSize	CGSize?
footerSize	CGSize?
itemSize	((IndexPath) -> CGSize)?
sectionHeaderSize	((IndexPath) -> CGSize)?
sectionFooterSize	((IndexPath) -> CGSize)?

SheetContentsViewController

Property	Type
sheetToolBar	UIView

Method	Explanation
func registCollectionElement()	Give CollectionView a chance to regulate Supplementray Element
func setupSheetLayout()	Provide an opportunity to set default settings for collectionview custom layout
func reload()	Help reload CollectionView and adjust the height of the content.
func close(completion: (() -> Void)? = nil)	Sheet Dismiss

Custom ToolBar

The built-in toolbar consists of a single button.

Default ToolBar

Setting up a Custom ToolBar is very simple.

sheetToolBar = CustomToolBar()

Author

• GwangBeom Park (@gwangbeom)

License

Sheet is released under the MIT license. See LICENSE for details.