From ae40133ef7fa109754d91f04c966faa246a68d32 Mon Sep 17 00:00:00 2001
From: Jonghyun Kim <filmhomage@hotmail.com>
Date: Mon, 6 Jun 2016 12:37:21 +0900
Subject: [PATCH] Fix an animation into single function

---
 SCLAlertView/SCLAlertView.swift | 84 ++++++++++++++-------------------
 1 file changed, 35 insertions(+), 49 deletions(-)

diff --git a/SCLAlertView/SCLAlertView.swift b/SCLAlertView/SCLAlertView.swift
index 51b0698..03ca1dc 100644
--- a/SCLAlertView/SCLAlertView.swift
+++ b/SCLAlertView/SCLAlertView.swift
@@ -37,7 +37,7 @@ public enum SCLAlertViewStyle {
 
 // Animation Styles
 public enum SCLAnimationStyle {
-    case NoAnimation, TopToBottom, BottomToTop, LeftToRight, RightToLeft, Appear
+    case NoAnimation, TopToBottom, BottomToTop, LeftToRight, RightToLeft
 }
 
 // Action Types
@@ -692,66 +692,52 @@ public class SCLAlertView: UIViewController {
         }
         
         // Animate in the alert view
-        switch animationStyle {
+        self.showAnimation(animationStyle)
+       
+        // Chainable objects
+        return SCLAlertViewResponder(alertview: self)
+    }
+    
+    // Show animation in the alert view
+    private func showAnimation(animationStyle: SCLAnimationStyle = .TopToBottom, animationStartOffset: CGFloat = -400.0, boundingAnimationOffset: CGFloat = 15.0, animationDuration: NSTimeInterval = 0.2) {
+        
+        let rv = UIApplication.sharedApplication().keyWindow! as UIWindow
+        var animationStartOrigin = self.baseView.frame.origin
+        var animationCenter : CGPoint = rv.center
         
+        switch animationStyle {
+
         case .NoAnimation:
             self.view.alpha = 1.0
+            return;
             
         case .TopToBottom:
-            self.baseView.frame.origin.y = -400
-            UIView.animateWithDuration(0.2, animations: {
-                self.baseView.center.y = rv.center.y + 15
-                self.view.alpha = 1
-                }, completion: { finished in
-                    UIView.animateWithDuration(0.2, animations: {
-                        self.baseView.center = rv.center
-                    })
-            })
+            animationStartOrigin = CGPoint(x: animationStartOrigin.x, y: self.baseView.frame.origin.y + animationStartOffset)
+            animationCenter = CGPoint(x: animationCenter.x, y: animationCenter.y + boundingAnimationOffset)
             
         case .BottomToTop:
-            self.baseView.frame.origin.y = 400
-            UIView.animateWithDuration(0.2, animations: {
-                self.baseView.center.y = rv.center.y - 15
-                self.view.alpha = 1
-                }, completion: { finished in
-                    UIView.animateWithDuration(0.2, animations: {
-                        self.baseView.center = rv.center
-                    })
-            })
+            animationStartOrigin = CGPoint(x: animationStartOrigin.x, y: self.baseView.frame.origin.y - animationStartOffset)
+            animationCenter = CGPoint(x: animationCenter.x, y: animationCenter.y - boundingAnimationOffset)
             
         case .LeftToRight:
-            self.baseView.frame.origin.x = -400
-            UIView.animateWithDuration(0.2, animations: {
-                self.baseView.center.x = rv.center.x + 15
-                self.view.alpha = 1
-                }, completion: { finished in
-                    UIView.animateWithDuration(0.2, animations: {
-                        self.baseView.center = rv.center
-                    })
-            })
+            animationStartOrigin = CGPoint(x: self.baseView.frame.origin.x + animationStartOffset, y: animationStartOrigin.y)
+            animationCenter = CGPoint(x: animationCenter.x + boundingAnimationOffset, y: animationCenter.y)
             
         case .RightToLeft:
-            self.baseView.frame.origin.x = 400
-            UIView.animateWithDuration(0.2, animations: {
-                self.baseView.center.x = rv.center.x - 15
-                self.view.alpha = 1
-                }, completion: { finished in
-                    UIView.animateWithDuration(0.2, animations: {
-                        self.baseView.center = rv.center
-                    })
-            })
-            
-        case .Appear:
-            self.view.alpha = 0.0
-            UIView.animateWithDuration(0.2, animations: {
-                self.view.alpha = 1.0
-                }, completion: { finished in
-            })
-            
+            animationStartOrigin = CGPoint(x: self.baseView.frame.origin.x - animationStartOffset, y: animationStartOrigin.y)
+            animationCenter = CGPoint(x: animationCenter.x - boundingAnimationOffset, y: animationCenter.y)
         }
-       
-        // Chainable objects
-        return SCLAlertViewResponder(alertview: self)
+
+        self.baseView.frame.origin = animationStartOrigin
+        UIView.animateWithDuration(animationDuration, animations: {
+            self.view.alpha = 1.0
+            self.baseView.center = animationCenter
+            }, completion: { finished in
+                UIView.animateWithDuration(animationDuration, animations: {
+                    self.view.alpha = 1.0
+                    self.baseView.center = rv.center
+                })
+        })
     }
     
     public func updateDurationStatus() {