Merge branch 'development' of https://github.com/CosmicMind/Material into development

Sources/iOS/Base.swift

+//
+//  Base.swift
+//  Material
+//
+//  Created by Orkhan Alikhanov on 8/29/17.
+//  Copyright © 2017 BiAtoms. All rights reserved.
+//
+
+import UIKit
+
+class Base: UIControl {
+    let titleLabel = UILabel()
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        prepare()
+    }
+    
+    required init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        prepare()
+    }
+    
+    let iconLayer = CALayer()
+    var selectedColor = UIColor(red: 0.25, green: 0.32, blue: 0.71, alpha: 1.0)
+    var normalColor = UIColor.gray
+    
+    func prepare() {
+        layer.addSublayer(iconLayer)
+        self.addTarget(self, action: #selector(didTap), for: .touchUpInside)
+        
+        beforeFirstAnimation()
+        firstAnimation()
+        beforeSecondAnimation()
+        secondAnimation()
+    }
+
+    @objc
+    func didTap() {
+        self.isSelected = !self.isSelected
+        self.animate()
+    }
+    
+    var sideLength: CGFloat { return frame.height }
+    
+    override var intrinsicContentSize: CGSize { return CGSize(width: 132, height: 132) }
+    
+    func beforeFirstAnimation() {}
+    func firstAnimation() {}
+    
+    func beforeSecondAnimation() {}
+    func secondAnimation() {}
+    
+    var isAnimating = false
+    
+    let totalDuration: TimeInterval = 0.5
+    let delayFactor: TimeInterval = 0.33
+    var duration: TimeInterval { return totalDuration / (1.0 + delayFactor + 1.0) }
+    func animate() {
+        beforeFirstAnimation()
+        CATransaction.animate(withDuration: duration,
+                              timingFunction: .easeInOut,
+                              animations: {
+                                self.isAnimating = true
+                                self.firstAnimation()
+        }) {
+            CATransaction.performWithoutAnimation {
+                self.beforeSecondAnimation()
+            }
+            CATransaction.animate(withDuration: self.duration,
+                                  delay: self.duration * self.delayFactor,
+                                  timingFunction: .easeInOut,
+                                  animations: {
+                                    self.secondAnimation()
+            }, completion: { self.isAnimating = false })
+        }
+    }
+    
+    override func layoutSubviews() {
+        super.layoutSubviews()
+        let size = CGSize(width: sideLength, height: sideLength)
+        self.iconLayer.frame.size = size
+   }
+}