FoldingCell

shot on dribbble:

The iPhone mockup available here.

Requirements

• iOS 8.0+
• Xcode 7.3

Installation

Just add the FoldingCell.swift file to your project.

or use CocoaPods with Podfile:

pod 'FoldingCell', '~> 0.8.1'

Solution

Usage

1. Create a new cell inheriting from FoldingCell

2. Add a UIView to your cell in your storyboard or nib file, inheriting from RotatedView. Connect the outlet from this view to the cell property foregroundView. Add constraints from this view to the superview, as in this picture:

(constants of constraints may be different). Add the identifier ForegroundViewTop for the top constraint. (This view will be shown when the cell is in its normal state).

3. Add other UIViews to your cell, connect the outlet from this view to the cell property containerView. Add constraints from this view to the superview like in the picture:

(constants of constraints may be different). Add the identifier "ContainerViewTop" for the top constraint. (This view will be shown when the cell is opened)

Your result should be something like this picture:

Demonstration adding constraints for foregroundView, containerView

4. Set @IBInspectable var itemCount: NSInteger property is a count of folding (it IBInspectable you can set in storyboard). range 2 or greater. Default value is 2

Ok, we've finished configuring the cell.

5. Adding code to your UITableViewController

5.1) Add constants:

     let kCloseCellHeight: CGFloat = *** // equal or greater foregroundView height
     let kOpenCellHeight: CGFloat = *** // equal or greater containerView height

5.2) Add property

     var cellHeights = [CGFloat]()

 create in viewDidLoad:

     override func viewDidLoad() {
        super.viewDidLoad()

        for _ in 0...kRowsCount {
            cellHeights.append(kCloseCellHeight)
        }
    }

5.3) Override method:

    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
        return cellHeights[indexPath.row]
    }

5.4) Added code to method:

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        let cell = tableView.cellForRowAtIndexPath(indexPath) as! FoldingCell

        var duration = 0.0
        if cellHeights[indexPath.row] == kCloseCellHeight { // open cell
            cellHeights[indexPath.row] = kOpenCellHeight
            cell.selectedAnimation(true, animated: true, completion: nil)
            duration = 0.5
        } else {// close cell
            cellHeights[indexPath.row] = kCloseCellHeight
            cell.selectedAnimation(false, animated: true, completion: nil)
            duration = 1.1
        }

        UIView.animateWithDuration(duration, delay: 0, options: .CurveEaseOut, animations: { () -> Void in
            tableView.beginUpdates()
            tableView.endUpdates()
        }, completion: nil)
    }

5.5) Control if the cell is open or closed

  override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {

        if cell is FoldingCell {
            let foldingCell = cell as! FoldingCell

            if cellHeights![indexPath.row] == kCloseCellHeight {
                foldingCell.selectedAnimation(false, animated: false, completion:nil)
            } else {
                foldingCell.selectedAnimation(true, animated: false, completion: nil)
            }
        }
    }

6. Add this code to your new cell class

    override func animationDuration(itemIndex:NSInteger, type:AnimationType)-> NSTimeInterval {

        // durations count equal it itemCount
        let durations = [0.33, 0.26, 0.26] // timing animation for each view
        return durations[itemIndex]
    }

Licence

Folding cell is released under the MIT license. See LICENSE for details.

About

The project maintained by app development agency Ramotion Inc. See our other open-source projects or hire us to design, develop, and grow your product.