增添代码

ganjmeng · Sep 17, 2015 · ff61831 · ff61831
1 parent c1eb30f
commit ff61831
Showing 1 changed file with 11 additions and 3 deletions.
diff --git a/iOS夯实：Crash in Cocoa/Crash in Cocoa.md b/iOS夯实：Crash in Cocoa/Crash in Cocoa.md
@@ -5,16 +5,24 @@ Cocoa中会导致Carsh的地方：
 ##1. 集合类越界：
 
 - 数组类型
-
+ 
 	越界访问会crash
 
 - 字典类型
 
 	查询时: 
-	objectForKey,key为nil。能够正常运行。
+
+	~~~objective-c
+	- (nullable ObjectType)objectForKey:(KeyType)aKey;
+	~~~
+	当key为nil。能够正常运行。
 
 	插入时: 
-	setObject:forKey:。object和key任一为nil,都会crash
+
+	~~~objective-c
+	- (void)setObject:(ObjectType)anObject forKey:(KeyType <NSCopying>)aKey;
+	~~~
+	插入时object和key任一为nil,都会crash
 
 - 字符串类型