Awesome

AmazingBubbles

Bubble pickers, inspired by Apple

Requirements:

• iOS 9.1+
• XCode 8.0+
• Swift 3.0

Installation

AmazingBubbles Library is available through CocoPods. To install, add the following line to your Podfile:

pod 'AmazingBubbles', '~> 0.0'

Usage:

1. Import library as follows:

import AmazingBubbles

2. Add ContentBubblesView to your VC;
3. Add delegate and dataSource for ContentBubblesView instance:

class ViewController: UIViewController {

  @IBOutlet weak var bubblesView: ContentBubblesView! {
      didSet {
          bubblesView.delegate = self
          bubblesView.dataSource = self
      }
  }
  
}

4. Implement protocols :

public protocol ContentBubblesViewDelegate: class {
    func minimalSizeForBubble(in view: ContentBubblesView) -> CGSize
    func maximumSizeForBubble(in view: ContentBubblesView) -> CGSize
    
    func contentBubblesView(_ view: ContentBubblesView, didSelectItemAt index: Int)
    func contentBubblesView(_ view: ContentBubblesView, shouldChangeSizeForItemAt index: Int) -> Bool
    func contentBubblesView(_ view: ContentBubblesView, didChangeSizeForItemAt index: Int)
}

public protocol ContentBubblesViewDataSource: class {
    func countOfSizes(in view: ContentBubblesView) -> Int
    
    func numberOfItems(in view: ContentBubblesView) -> Int
    func addOrUpdateBubbleView(forItemAt index: Int, currentView: BubbleView?) -> BubbleView
}

for example:

extension ViewController: ContentBubblesViewDataSource {
    func countOfSizes(in view: ContentBubblesView) -> Int {
        return 3
    }
    
    func numberOfItems(in view: ContentBubblesView) -> Int {
        return 15
    }
    
    func addOrUpdateBubbleView(forItemAt index: Int, currentView: BubbleView?) -> BubbleView {
        var view: BubbleView = currentView ?? BubbleView()        
        view.backgroundColor = .clear
        let randomOrigin = CGPoint(x: CGFloat(drand48() * Double(self.view.frame.width * 2 / 3)),
                                   y: CGFloat(drand48() * Double(self.view.frame.height * 2 / 3)))
        view.frame = CGRect(origin: randomOrigin,
                            size: .zero)
        return view
    }
}

5. And than call:

bubblesView.reload(randomizePosition: true) 

Additional features:

• You can create custom views by subclassing BubbleView
• You can enable/disable gestures in ContentBubblesView:

bubblesView.tapEnabled = true
bubblesView.panEnabled = false

• Also you can change some settings in BubbleConstants struct or play with some settings of UIDynamicBehaviors.