Added TKProgress View

TKProgressView.xcodeproj/project.pbxproj

@@ -12,6 +12,7 @@
 		15DF40A22032E51C00C64CE3 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 15DF40A02032E51C00C64CE3 /* Main.storyboard */; };
 		15DF40A42032E51C00C64CE3 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 15DF40A32032E51C00C64CE3 /* Assets.xcassets */; };
 		15DF40A72032E51C00C64CE3 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 15DF40A52032E51C00C64CE3 /* LaunchScreen.storyboard */; };
+		15DF40AF2032E55E00C64CE3 /* TKProgressView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 15DF40AE2032E55D00C64CE3 /* TKProgressView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -22,6 +23,7 @@
 		15DF40A32032E51C00C64CE3 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		15DF40A62032E51C00C64CE3 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		15DF40A82032E51C00C64CE3 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		15DF40AE2032E55D00C64CE3 /* TKProgressView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TKProgressView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -56,6 +58,7 @@
 			children = (
 				15DF409C2032E51C00C64CE3 /* AppDelegate.swift */,
 				15DF409E2032E51C00C64CE3 /* ViewController.swift */,
+				15DF40AE2032E55D00C64CE3 /* TKProgressView.swift */,
 				15DF40A02032E51C00C64CE3 /* Main.storyboard */,
 				15DF40A32032E51C00C64CE3 /* Assets.xcassets */,
 				15DF40A52032E51C00C64CE3 /* LaunchScreen.storyboard */,
@@ -137,6 +140,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				15DF409F2032E51C00C64CE3 /* ViewController.swift in Sources */,
+				15DF40AF2032E55E00C64CE3 /* TKProgressView.swift in Sources */,
 				15DF409D2032E51C00C64CE3 /* AppDelegate.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

TKProgressView/TKProgressView.swift

@@ -0,0 +1,96 @@
+import Foundation
+import UIKit
+
+extension UIColor {
+	convenience init(_ hex6: UInt32) {
+		let divisor = CGFloat(255)
+		let red = CGFloat((hex6 & 0xFF0000) >> 16) / divisor
+		let green = CGFloat((hex6 & 0x00FF00) >> 8) / divisor
+		let blue = CGFloat((hex6 & 0x0000FF) >> 0) / divisor
+		self.init(red: red, green: green, blue: blue, alpha: 1.0)
+	}
+}
+
+class TKProgressView: UIView {
+	var colors = [
+		UIColor(0xee1c27),UIColor(0xbc0271),UIColor(0x612d92),UIColor(0x283897),
+		UIColor(0x016db8),UIColor(0x02a2b8),UIColor(0x00a666),UIColor(0xa7d04e),
+		UIColor(0xfef200),UIColor(0xfeaf16),UIColor(0xf58020),UIColor(0xf35724)]
+
+	fileprivate var startIndex = 3
+
+	var isCircular = true
+	var numberOfBalls = 12
+	var speed: Double = 0.75
+
+	fileprivate var timeStep: Int = 0
+	fileprivate var radius: CGFloat = 0
+	fileprivate var displayLink: CADisplayLink?
+
+    required override init(frame: CGRect =  CGRect(x: 0, y: 0, width: 100, height: 100)) {
+        super.init(frame: frame)
+
+        radius = min(frame.width, frame.height) / 3
+    }
+	required init?(coder aDecoder: NSCoder) {
+		super.init(coder: aDecoder)
+
+		frame.size.width = 100
+		frame.size.height = 100
+
+		radius = min(frame.width, frame.height) / 3
+	}
+
+	func startAnimating() {
+		displayLink = UIScreen.main.displayLink(withTarget: self, selector: #selector(TKProgressView.animateBalls))
+		displayLink?.add(to: .current, forMode: .defaultRunLoopMode)
+	}
+
+	func stopAnimating() {
+		displayLink?.invalidate()
+		timeStep = 0
+	}
+
+	func clear() {
+		layer.sublayers?.removeAll()
+	}
+
+	func drawBall(_ x: CGFloat, _ y: CGFloat, _ color: UIColor) {
+		let dot = CAShapeLayer()
+		dot.path = UIBezierPath(ovalIn: CGRect(x: x, y: y, width: 7, height: 7)).cgPath
+		dot.fillColor = color.cgColor
+		dot.strokeColor = UIColor.clear.cgColor
+		dot.lineWidth = 0
+		layer.addSublayer(dot)
+	}
+
+	func animateBalls() {
+		clear()
+
+		for i in startIndex ..< numberOfBalls + startIndex {
+			drawBall(getX(i: i, timeStep: timeStep), getY(i: i, timeStep: timeStep), colors[i-startIndex])
+		}
+
+		timeStep += 1
+	}
+
+	func getR(i: Int) -> CGFloat {
+		return CGFloat((CGFloat(1+i) / CGFloat(numberOfBalls)) * radius)
+	}
+
+	func getT(i: Int, timeStep: Int) -> Double {
+		return Double(timeStep) * (Double(i) / 100 * speed + 0.005)
+	}
+
+	func getX(i: Int, timeStep: Int) -> CGFloat {
+		return (frame.width / 2) + CGFloat(getR(i: i)) * cos(CGFloat(getT(i: i, timeStep: timeStep)))
+	}
+
+	func getY(i: Int, timeStep: Int) -> CGFloat {
+		if isCircular {
+			return (frame.height / 2) + CGFloat(getR(i: i)) * sin(CGFloat(getT(i: i, timeStep: timeStep)))
+		} else {
+			return frame.height / 2
+		}
+	}
+}

TKProgressView/ViewController.swift

@@ -12,14 +12,10 @@ class ViewController: UIViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view, typically from a nib.
-    }
 
-    override func didReceiveMemoryWarning() {
-        super.didReceiveMemoryWarning()
-        // Dispose of any resources that can be recreated.
+        let tkView: TKProgressView = TKProgressView.init(frame: CGRect.init(x: 50, y: 50, width: 100, height: 100 ))
+        self.view.addSubview(tkView)
+        tkView.startAnimating()
     }
-
-
 }