diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fce251b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,70 @@
+
+# Created by https://www.gitignore.io/api/swift
+
+### Swift ###
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
+build/
+DerivedData/
+
+##DS_Store
+*.DS_Store
+.DS_Store
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xcuserstate
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+#
+# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
+# Packages/
+.build/
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# Pods/
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
+# screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://github.com/fastlane/fastlane/blob/master/docs/Gitignore.md
+
+fastlane/report.xml
+fastlane/screenshots
+
diff --git a/A guide to iOS animation_logo v1.0.png b/A guide to iOS animation_logo v1.0.png
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diff --git a/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/AnimatedCurveDemo/AnimatedCurveDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/AnimatedCurveDemo/AnimatedCurveDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/AnimatedCurveDemo/AnimatedCurveDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/AnimatedCurveDemo/AnimatedCurveDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
deleted file mode 100644
index 9db5cfb..0000000
--- a/AnimatedCurveDemo/AnimatedCurveDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
+++ /dev/null
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diff --git a/DownloadButtonDemo/CADemos.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/DownloadButtonDemo/CADemos.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/DynamicActionBlockDemo/DynamicActionBlockDemo/DynamicActionBlockDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/DynamicActionBlockDemo/DynamicActionBlockDemo/DynamicActionBlockDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
deleted file mode 100644
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diff --git a/GooeySlideMenuDemo/GooeySlideMenuDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/GooeySlideMenuDemo/GooeySlideMenuDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
deleted file mode 100644
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diff --git a/GooeySlideMenuDemo/GooeySlideMenuDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/GooeySlideMenuDemo/GooeySlideMenuDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
deleted file mode 100644
index 06a8e72..0000000
--- a/GooeySlideMenuDemo/GooeySlideMenuDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
+++ /dev/null
@@ -1,23 +0,0 @@
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diff --git a/InteractiveCardDemo/InteractiveCardDemo/InteractiveCardDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/InteractiveCardDemo/InteractiveCardDemo/InteractiveCardDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/JumpStarDemo/CoreAnimations.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/JumpStarDemo/CoreAnimations.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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diff --git a/KYGooeyMenuDemo/KYGooeyMenu/KYGooeyMenu.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/KYGooeyMenuDemo/KYGooeyMenu/KYGooeyMenu.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
deleted file mode 100644
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diff --git a/KYGooeyMenuDemo/KYGooeyMenu/KYGooeyMenu.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/KYGooeyMenuDemo/KYGooeyMenu/KYGooeyMenu.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
deleted file mode 100644
index b777ad7..0000000
--- a/KYGooeyMenuDemo/KYGooeyMenu/KYGooeyMenu.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
+++ /dev/null
@@ -1,33 +0,0 @@
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diff --git a/KYLoadingHUD/KYLoadingHUD.h b/KYLoadingHUD/KYLoadingHUD.h
deleted file mode 100644
index ebcfa87..0000000
--- a/KYLoadingHUD/KYLoadingHUD.h
+++ /dev/null
@@ -1,16 +0,0 @@
-//
-// KYLoadingHUD.h
-//
-//
-// Created by Kitten Yang on 2/23/15.
-// Copyright (c) 2015 Kitten Yang. All rights reserved.
-//
-
-#import
-
-@interface KYLoadingHUD : UIView
-
-
--(void)showHUD;
--(void)dismissHUD;
-@end
diff --git a/KYLoadingHUD/KYLoadingHUD.m b/KYLoadingHUD/KYLoadingHUD.m
deleted file mode 100644
index 852779c..0000000
--- a/KYLoadingHUD/KYLoadingHUD.m
+++ /dev/null
@@ -1,153 +0,0 @@
-//
-// KYLoadingHUD.m
-//
-//
-// Created by Kitten Yang on 2/23/15.
-// Copyright (c) 2015 Kitten Yang. All rights reserved.
-//
-
-#define ORIGIN_X self.frame.origin.x
-#define ORIGIN_Y self.frame.origin.y
-#define WIDTH self.frame.size.width
-#define HEIGHT self.frame.size.height
-#define BALL_RADIUS 20
-#import "KYLoadingHUD.h"
-
-
-
-@implementation KYLoadingHUD{
- UIView *ball_1;
- UIView *ball_2;
- UIView *ball_3;
-
-}
-
--(id)initWithFrame:(CGRect)frame{
- self = [super initWithFrame:frame];
- if (self) {
- self.backgroundColor = [UIColor clearColor];
- self.layer.cornerRadius = WIDTH /2;
- self.clipsToBounds = YES;
- }
- return self;
-}
-
-
--(void)showHUD{
-
-
-// UIVisualEffectView *bgView = [[UIVisualEffectView alloc]initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight ]];
-// bgView.frame = CGRectMake(0, 0, WIDTH, HEIGHT);
-// [self addSubview:bgView];
-
-
- ball_2 = [[UIView alloc]initWithFrame:CGRectMake(WIDTH/2 - BALL_RADIUS/2, HEIGHT / 2-BALL_RADIUS/2, BALL_RADIUS, BALL_RADIUS)];
- ball_2.backgroundColor = [UIColor blackColor];
- ball_2.layer.cornerRadius = ball_2.bounds.size.width / 2;
-
- ball_1 = [[UIView alloc]initWithFrame:CGRectMake(ball_2.frame.origin.x - BALL_RADIUS, ball_2.frame.origin.y, BALL_RADIUS, BALL_RADIUS)];
- ball_1.backgroundColor = [UIColor blackColor];
- ball_1.layer.cornerRadius = ball_1.bounds.size.width / 2;
-
- ball_3 = [[UIView alloc]initWithFrame:CGRectMake(ball_2.frame.origin.x + BALL_RADIUS, ball_2.frame.origin.y, BALL_RADIUS, BALL_RADIUS)];
- ball_3.backgroundColor = [UIColor blackColor];
- ball_3.layer.cornerRadius = ball_3.bounds.size.width / 2;
-
- [self addSubview:ball_1];
- [self addSubview:ball_2];
- [self addSubview:ball_3];
- [self startLoadingAnimation];
-
-}
-
--(void)startLoadingAnimation{
-
- //-----1--------
- UIBezierPath *circlePath_1 = [UIBezierPath bezierPath];
- [circlePath_1 moveToPoint:CGPointMake(WIDTH/2-BALL_RADIUS, HEIGHT/2)];
-
- [circlePath_1 addArcWithCenter:CGPointMake(WIDTH/2, HEIGHT/2) radius:BALL_RADIUS startAngle:(180*M_PI)/180 endAngle:(360*M_PI)/180 clockwise:NO];
- UIBezierPath *circlePath_1_2 = [UIBezierPath bezierPath];
- [circlePath_1_2 addArcWithCenter:CGPointMake(WIDTH/2, HEIGHT/2) radius:BALL_RADIUS startAngle:0 endAngle:(180*M_PI)/180 clockwise:NO];
- [circlePath_1 appendPath:circlePath_1_2];
-
-
- CAKeyframeAnimation *animation=[CAKeyframeAnimation animationWithKeyPath:@"position"];
- animation.path = circlePath_1.CGPath;
- animation.removedOnCompletion = NO;
- animation.fillMode = kCAFillModeForwards;
- animation.calculationMode = kCAAnimationCubic;
- animation.repeatCount = 1;
- animation.duration = 1.4;
- animation.delegate = self;
- // animation.beginTime = 0.1;
- animation.autoreverses = NO;
- animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
-
-
- [ball_1.layer addAnimation:animation forKey:@"animation"];
-
-
- //------2--------
- UIBezierPath *circlePath_2 = [UIBezierPath bezierPath];
- [circlePath_2 moveToPoint:CGPointMake(WIDTH/2+BALL_RADIUS, HEIGHT/2)];
-
- [circlePath_2 addArcWithCenter:CGPointMake(WIDTH/2, HEIGHT/2) radius:BALL_RADIUS startAngle:(0*M_PI)/180 endAngle:(180*M_PI)/180 clockwise:NO];
- UIBezierPath *circlePath_2_2 = [UIBezierPath bezierPath];
- [circlePath_2_2 addArcWithCenter:CGPointMake(WIDTH/2, HEIGHT/2) radius:BALL_RADIUS startAngle:(180 *M_PI)/180 endAngle:(360*M_PI)/180 clockwise:NO];
- [circlePath_2 appendPath:circlePath_2_2];
-
-
- CAKeyframeAnimation *animation_2=[CAKeyframeAnimation animationWithKeyPath:@"position"];
- animation_2.path = circlePath_2.CGPath;
- animation_2.removedOnCompletion = NO;
- animation_2.fillMode = kCAFillModeForwards;
- animation_2.repeatCount = 1;
- // animation_2.beginTime = 0.1;
- animation_2.duration =1.4 ;
- animation_2.autoreverses = NO;
- animation_2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
- [ball_3.layer addAnimation:animation_2 forKey:@"Rotation"];
-
-}
-
-
-- (void)animationDidStart:(CAAnimation *)anim{
-
- [UIView animateWithDuration:0.3 delay:0.1 options:UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionBeginFromCurrentState animations:^{
- ball_1.transform = CGAffineTransformMakeTranslation(-BALL_RADIUS, 0);
- ball_1.transform = CGAffineTransformScale(ball_1.transform, 0.7, 0.7);
-
- ball_3.transform = CGAffineTransformMakeTranslation(BALL_RADIUS, 0);
- ball_3.transform = CGAffineTransformScale(ball_3.transform, 0.7, 0.7);
-
- ball_2.transform = CGAffineTransformScale(ball_2.transform, 0.7, 0.7);
-
-
- } completion:^(BOOL finished) {
- [UIView animateWithDuration:0.3 delay:0.1 options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState animations:^{
- ball_1.transform = CGAffineTransformIdentity;
- ball_3.transform = CGAffineTransformIdentity;
- ball_2.transform = CGAffineTransformIdentity;
-
- } completion:nil];
- }];
-
-}
-
-
--(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
- [self startLoadingAnimation];
-}
-
-
--(void)dismissHUD{
- [UIView animateWithDuration:1 delay:0.0f usingSpringWithDamping:0.6f initialSpringVelocity:0.0f options:UIViewAnimationOptionCurveEaseInOut animations:^{
- self.transform = CGAffineTransformScale(self.transform, 1.5, 1.5);
- self.alpha = 0;
- } completion:^(BOOL finished) {
- [self removeFromSuperview];
- }];
-}
-
-@end
diff --git a/KYPingTransitionDemo/KYPingTransition.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/KYPingTransitionDemo/KYPingTransition.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
deleted file mode 100644
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diff --git a/KYPingTransitionDemo/KYPingTransition.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/KYPingTransitionDemo/KYPingTransition.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
deleted file mode 100644
index 98647c0..0000000
--- a/KYPingTransitionDemo/KYPingTransition.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
+++ /dev/null
@@ -1,23 +0,0 @@
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diff --git a/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.pbxproj b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.pbxproj
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.pbxproj
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.pbxproj
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata
diff --git a/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/project.xcworkspace/xcuserdata/KittenYang.xcuserdatad/UserInterfaceState.xcuserstate
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index 0000000..26b2eb3
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diff --git a/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/AnimatedCircleDemo.xcscheme b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/AnimatedCircleDemo.xcscheme
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/AnimatedCircleDemo.xcscheme
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/AnimatedCircleDemo.xcscheme
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/xcschememanagement.plist b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/xcschememanagement.plist
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/xcschememanagement.plist
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo.xcodeproj/xcuserdata/KittenYang.xcuserdatad/xcschemes/xcschememanagement.plist
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.h b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.h
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.h
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.h
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.m b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.m
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.m
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/AppDelegate.m
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/LaunchScreen.xib b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/LaunchScreen.xib
similarity index 100%
rename from AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/LaunchScreen.xib
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/LaunchScreen.xib
diff --git a/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard
similarity index 89%
rename from AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard
rename to Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard
index fad059c..22fc87d 100644
--- a/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard
+++ b/Objective-C Version/AnimatedCircleDemo/AnimatedCircleDemo/Base.lproj/Main.storyboard
@@ -1,7 +1,8 @@
-
+
-
+
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@@ -22,13 +23,13 @@
-