添加了一个知识性问题

nasitray · nasitray · commit 99999d45e2a0 · 2016-03-10T00:14:27.000+08:00
diff --git a/README.md b/README.md
@@ -60,6 +60,7 @@
 * UIWebView &#26377;&#21738;&#20123;&#24615;&#33021;&#38382;&#39064;&#65311;&#26377;&#27809;&#26377;&#21487;&#26367;&#20195;&#30340;&#26041;&#26696;&#12290;
 * &#20026;&#20160;&#20040; NotificationCenter &#35201; removeObserver? &#22914;&#20309;&#23454;&#29616;&#33258;&#21160; remove?
 * &#24403; `TableView` &#30340; `Cell` &#25913;&#21464;&#26102;&#65292;&#22914;&#20309;&#35753;&#36825;&#20123;&#25913;&#21464;&#20197;&#21160;&#30011;&#30340;&#24418;&#24335;&#21576;&#29616;&#65311;
+* &#20160;&#20040;&#26159; `Method Swizzle`&#65292;&#20160;&#20040;&#24773;&#20917;&#19979;&#20250;&#20351;&#29992;&#65311;
 
 ## &#32463;&#39564;&#31867;&#38382;&#39064;
 * &#20026;&#20160;&#20040; `UIScrollView` &#30340;&#28378;&#21160;&#20250;&#23548;&#33268; `NSTimer` &#22833;&#25928;&#65311;
@@ -92,3 +93,4 @@
 * http://way2ios.com/development/ios-development-2/iphone-interview-question-answers/
 * https://blackpixel.com/writing/2013/04/interview-questions-for-ios-and-mac-developers-1.html
 * https://github.com/CameronBanga/iOS-Developer-and-Designer-Interview-Questions
+

-Original file line number
+Diff line change
 * UIWebView 有哪些性能问题？有没有可替代的方案。
 * 为什么 NotificationCenter 要 removeObserver? 如何实现自动 remove?
 * 当 `TableView` 的 `Cell` 改变时，如何让这些改变以动画的形式呈现？
 +* 什么是 `Method Swizzle`，什么情况下会使用？
 ## 经验类问题
 * 为什么 `UIScrollView` 的滚动会导致 `NSTimer` 失效？
 * http://way2ios.com/development/ios-development-2/iphone-interview-question-answers/
 * https://blackpixel.com/writing/2013/04/interview-questions-for-ios-and-mac-developers-1.html
 * https://github.com/CameronBanga/iOS-Developer-and-Designer-Interview-Questions
++