Merge pull request #20 from dabing1022/master

add ball rotate chase animation

Author: ninjaprox

NVActivityIndicatorView/Animations/NVActivityIndicatorAnimationBallRotateChase.swift

@@ -0,0 +1,57 @@
+//
+//  NVActivityIndicatorAnimationBallRotateChase.swift
+//  NVActivityIndicatorViewDemo
+//
+//  Created by ChildhoodAndy on 15/12/7.
+//  Copyright © 2015年 Nguyen Vinh. All rights reserved.
+//
+
+import UIKit
+
+class NVActivityIndicatorAnimationBallRotateChase: NVActivityIndicatorAnimationDelegate {
+    
+    func setUpAnimationInLayer(layer: CALayer, size: CGSize, color: UIColor) {
+        let circleSize = size.width / 5;
+        
+        // Draw circles
+        for var i = 0; i < 5; i++ {
+            let factor = Float(i) * 1.0 / 5
+            let circle = NVActivityIndicatorShape.Circle.createLayerWith(size: CGSize(width: circleSize, height: circleSize), color: color)
+            
+            let animation = rotateAnimation(factor, x: layer.bounds.size.width / 2, y: layer.bounds.size.height / 2, size: size)
+            circle.addAnimation(animation, forKey: "animation")
+            layer.addSublayer(circle)
+        }
+    }
+    
+    func rotateAnimation(rate: Float, x: CGFloat, y: CGFloat, size: CGSize) -> CAAnimationGroup {
+        let duration: CFTimeInterval = 1.5
+        let fromScale = 1 - rate
+        let toScale = 0.2 + rate
+        let timeFunc = CAMediaTimingFunction(controlPoints: 0.5, 0.15 + rate, 0.25, 1.0)
+        
+        // Scale animation
+        let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
+        scaleAnimation.duration = duration
+        scaleAnimation.repeatCount = HUGE
+        scaleAnimation.fromValue = fromScale
+        scaleAnimation.toValue = toScale
+        
+        // Position animation
+        let positionAnimation = CAKeyframeAnimation(keyPath: "position")
+        positionAnimation.duration = duration
+        positionAnimation.repeatCount = HUGE
+        positionAnimation.path = UIBezierPath(arcCenter: CGPoint(x: x, y: y), radius: size.width / 2, startAngle: 3 * CGFloat(M_PI) * 0.5, endAngle: 3 * CGFloat(M_PI) * 0.5 + 2 * CGFloat(M_PI), clockwise: true).CGPath
+        
+        // Aniamtion
+        let animation = CAAnimationGroup()
+        animation.animations = [scaleAnimation, positionAnimation]
+        animation.timingFunction = timeFunc
+        animation.duration = duration
+        animation.repeatCount = HUGE
+        animation.removedOnCompletion = false
+        
+        return animation
+    }
+}
+

NVActivityIndicatorView/NVActivityIndicatorView.swift

@@ -38,6 +38,7 @@ public enum NVActivityIndicatorType {
     case Pacman
     case BallGridBeat
     case SemiCircleSpin
+    case BallRotateChase
 
     private func animation() -> NVActivityIndicatorAnimationDelegate {
         switch self {
@@ -99,6 +100,8 @@ public enum NVActivityIndicatorType {
             return NVActivityIndicatorAnimationBallGridBeat()
         case .SemiCircleSpin:
             return NVActivityIndicatorAnimationSemiCircleSpin()
+        case .BallRotateChase:
+            return NVActivityIndicatorAnimationBallRotateChase()
         }
     }
 }

NVActivityIndicatorViewDemo.xcodeproj/project.pbxproj

@@ -78,6 +78,8 @@
 		90A879C61BA557B1001C8989 /* NVActivityIndicatorAnimationSemiCircleSpin.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90A879831BA55798001C8989 /* NVActivityIndicatorAnimationSemiCircleSpin.swift */; };
 		90A879C71BA557B1001C8989 /* NVActivityIndicatorAnimationSquareSpin.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90A879841BA55798001C8989 /* NVActivityIndicatorAnimationSquareSpin.swift */; };
 		90A879C81BA557B1001C8989 /* NVActivityIndicatorAnimationTriangleSkewSpin.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90A879851BA55798001C8989 /* NVActivityIndicatorAnimationTriangleSkewSpin.swift */; };
+		BD1452341C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift in Sources */ = {isa = PBXBuildFile; fileRef = BD1452331C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift */; };
+		BD1452351C1586F200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift in Sources */ = {isa = PBXBuildFile; fileRef = BD1452331C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -136,6 +138,7 @@
 		90A879861BA55798001C8989 /* NVActivityIndicatorAnimationDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NVActivityIndicatorAnimationDelegate.swift; sourceTree = "<group>"; };
 		90A879871BA55798001C8989 /* NVActivityIndicatorShape.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NVActivityIndicatorShape.swift; sourceTree = "<group>"; };
 		90A879881BA55798001C8989 /* NVActivityIndicatorView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NVActivityIndicatorView.swift; sourceTree = "<group>"; };
+		BD1452331C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NVActivityIndicatorAnimationBallRotateChase.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -274,6 +277,7 @@
 				90A879831BA55798001C8989 /* NVActivityIndicatorAnimationSemiCircleSpin.swift */,
 				90A879841BA55798001C8989 /* NVActivityIndicatorAnimationSquareSpin.swift */,
 				90A879851BA55798001C8989 /* NVActivityIndicatorAnimationTriangleSkewSpin.swift */,
+				BD1452331C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift */,
 			);
 			path = Animations;
 			sourceTree = "<group>";
@@ -447,6 +451,7 @@
 				90A879BD1BA557B1001C8989 /* NVActivityIndicatorAnimationBallZigZagDeflect.swift in Sources */,
 				90A879B51BA557B1001C8989 /* NVActivityIndicatorAnimationBallRotate.swift in Sources */,
 				90A879B31BA557B1001C8989 /* NVActivityIndicatorAnimationBallPulseRise.swift in Sources */,
+				BD1452351C1586F200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift in Sources */,
 				90A879C71BA557B1001C8989 /* NVActivityIndicatorAnimationSquareSpin.swift in Sources */,
 				90A879AE1BA557B1001C8989 /* NVActivityIndicatorAnimationBallClipRotateMultiple.swift in Sources */,
 				90A879AF1BA557B1001C8989 /* NVActivityIndicatorAnimationBallClipRotatePulse.swift in Sources */,
@@ -488,6 +493,7 @@
 				90A8798C1BA55798001C8989 /* NVActivityIndicatorAnimationBallClipRotatePulse.swift in Sources */,
 				90A879A51BA55798001C8989 /* NVActivityIndicatorAnimationTriangleSkewSpin.swift in Sources */,
 				90A879921BA55798001C8989 /* NVActivityIndicatorAnimationBallRotate.swift in Sources */,
+				BD1452341C15810200B952C8 /* NVActivityIndicatorAnimationBallRotateChase.swift in Sources */,
 				90A879941BA55798001C8989 /* NVActivityIndicatorAnimationBallScaleMultiple.swift in Sources */,
 				90A879A11BA55798001C8989 /* NVActivityIndicatorAnimationLineSpinFadeLoader.swift in Sources */,
 				90A879981BA55798001C8989 /* NVActivityIndicatorAnimationBallTrianglePath.swift in Sources */,

NVActivityIndicatorViewDemo/ViewController.swift

@@ -43,9 +43,10 @@ class ViewController: UIViewController {
             .TriangleSkewSpin,
             .Pacman,
             .BallGridBeat,
-            .SemiCircleSpin]
+            .SemiCircleSpin,
+            .BallRotateChase]
         let cols = 4
-        let rows = 7
+        let rows = 8
         let cellWidth = Int(self.view.frame.width / CGFloat(cols))
         let cellHeight = Int(self.view.frame.height / CGFloat(rows))