From d823fd37c5afff18335f6532fb474cf4bc99ab3d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=A2=E5=85=8B?= <luke.lkj@taobao.com>
Date: Tue, 19 Mar 2013 17:19:38 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E5=85=A5ctrundelegate=20=E7=9A=84?=
 =?UTF-8?q?=E5=9B=9E=E8=B0=83?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 _posts/2013/2013-03-11-core-text.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/_posts/2013/2013-03-11-core-text.md b/_posts/2013/2013-03-11-core-text.md
index b68505b..dcf4343 100644
--- a/_posts/2013/2013-03-11-core-text.md
+++ b/_posts/2013/2013-03-11-core-text.md
@@ -161,6 +161,25 @@ callbacks的结构体为CTRunDelegateCallbacks，主要是包含一些回调函
 
 {% highlight objc %}
 
+void RunDelegateDeallocCallback( void* refCon ){
+    
+}
+
+CGFloat RunDelegateGetAscentCallback( void *refCon ){
+    NSString *imageName = (NSString *)refCon;
+    return [UIImage imageNamed:imageName].size.height;
+}
+
+CGFloat RunDelegateGetDescentCallback(void *refCon){
+    return 0;
+}
+
+CGFloat RunDelegateGetWidthCallback(void *refCon){
+    NSString *imageName = (NSString *)refCon;
+    return [UIImage imageNamed:imageName].size.width;
+}
+
+
 - (void)drawRect:(CGRect)rect
 {
     CGContextRef context = UIGraphicsGetCurrentContext();