fix bug: Catransaction.begin is not written

	modified:   JXPageControl.podspec
	modified:   JXPageControl/Classes/Jump/JXPageControlJump.swift
	modified:   JXPageControl/Classes/Transform/JXPageControlExchange.swift
	modified:   JXPageControl/Classes/Transform/JXPageControlScale.swift

Author: jiaxiang.tan

JXPageControl.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'JXPageControl'
-  s.version          = '0.1.4'
+  s.version          = '0.1.5'
   s.summary          = 'Custom UIPageControl: supports multiple animations, layouts'
 
 # This description is used to generate tags and improve search results.

JXPageControl/Classes/Jump/JXPageControlJump.swift

@@ -26,6 +26,7 @@ import UIKit
             else { return }
 
         CATransaction.setDisableActions(!isAnimation)
+        CATransaction.begin()
 
         let marginX = (maxIndicatorSize.width - activeSize.width) * 0.5
         let marginyY = (maxIndicatorSize.height - activeSize.height) * 0.5

JXPageControl/Classes/Transform/JXPageControlExchange.swift

@@ -29,6 +29,7 @@ import UIKit
         if leftIndex == rightIndex {
 
             CATransaction.setDisableActions(true)
+            CATransaction.begin()
 
             let marginX: CGFloat = maxIndicatorSize.width + columnSpacing
 
@@ -59,6 +60,7 @@ import UIKit
         }else {
 
             CATransaction.setDisableActions(true)
+            CATransaction.begin()
 
             let marginX: CGFloat = maxIndicatorSize.width + columnSpacing
 

JXPageControl/Classes/Transform/JXPageControlScale.swift

@@ -64,6 +64,7 @@ import UIKit
 
 
             CATransaction.setDisableActions(true)
+            CATransaction.begin()
 
             let tempInactiveColor = isInactiveHollow ? UIColor.clear : inactiveColor
             let tempActiveColor = (isInactiveHollow && isActiveHollow) ? UIColor.clear : activeColor