From d4574173b1fdb6fc5beed5d00d2f68b5d98d7c57 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=A2=E5=85=8B?= <kejinlu@gmail.com>
Date: Sun, 7 Oct 2012 01:35:27 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E6=8E=92=E7=89=88?=
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---
 _posts/2012/2012-09-26-animation-in-ios.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/_posts/2012/2012-09-26-animation-in-ios.md b/_posts/2012/2012-09-26-animation-in-ios.md
index 4a6d448..efaedb8 100644
--- a/_posts/2012/2012-09-26-animation-in-ios.md
+++ b/_posts/2012/2012-09-26-animation-in-ios.md
@@ -136,7 +136,12 @@ Timing Function对应的类是CAMediaTimingFunction,它提供了两种获得时
 - (id)initWithControlPoints:(float)c1x :(float)c1y :(float)c2x :(float)c2y;
 {% endhighlight %}
 
-五种预定义的时间函数名字的常量变量分别为 kCAMediaTimingFunctionLinear,kCAMediaTimingFunctionEaseIn,kCAMediaTimingFunctionEaseOut,kCAMediaTimingFunctionEaseInEaseOut,kCAMediaTimingFunctionDefault.   
+五种预定义的时间函数名字的常量变量分别为    
+kCAMediaTimingFunctionLinear,
+kCAMediaTimingFunctionEaseIn,   
+kCAMediaTimingFunctionEaseOut,    
+kCAMediaTimingFunctionEaseInEaseOut,    
+kCAMediaTimingFunctionDefault.   
 ![](http://ww1.sinaimg.cn/large/65cc0af7gw1dxlv7mhtj3j.jpg)  
 自定义的Timing Function的函数图像就是一条三次贝塞尔曲线(Cubic Bezier Curve),贝塞尔曲线的优点就是光滑，用在这里就使得变化显得光滑。一条三次贝塞尔曲线可以由起点终点以及两个控制点决定。其中kCAMediaTimingFunctionDefault对应的函数曲线其实就是通过[(0.0,0.0), (0.25,0.1), (0.25,0.1), (1.0,1.0)]这四个点决定的三次贝塞尔曲线,头尾为起点和终点,中间的两个点是控制点.