diff --git a/MJExtension/NSObject+MJClass.m b/MJExtension/NSObject+MJClass.m
index 286ce70f..cd987cfe 100644
--- a/MJExtension/NSObject+MJClass.m
+++ b/MJExtension/NSObject+MJClass.m
@@ -19,7 +19,7 @@
 
 @implementation NSObject (MJClass)
 
-+ (NSMutableDictionary *)classDictForKey:(const void *)key
++ (NSMutableDictionary *)mj_classDictForKey:(const void *)key
 {
     static NSMutableDictionary *allowedPropertyNamesDict;
     static NSMutableDictionary *ignoredPropertyNamesDict;
@@ -141,7 +141,7 @@ + (void)mj_setupBlockReturnValue:(id (^)(void))block key:(const char *)key
     // 清空数据
     MJExtensionSemaphoreCreate
     MJExtensionSemaphoreWait
-    [[self classDictForKey:key] removeAllObjects];
+    [[self mj_classDictForKey:key] removeAllObjects];
     MJExtensionSemaphoreSignal
 }
 
@@ -149,10 +149,10 @@ + (NSMutableArray *)mj_totalObjectsWithSelector:(SEL)selector key:(const char *)
 {
     MJExtensionSemaphoreCreate
     MJExtensionSemaphoreWait
-    NSMutableArray *array = [self classDictForKey:key][NSStringFromClass(self)];
+    NSMutableArray *array = [self mj_classDictForKey:key][NSStringFromClass(self)];
     if (array == nil) {
         // 创建、存储
-        [self classDictForKey:key][NSStringFromClass(self)] = array = [NSMutableArray array];
+        [self mj_classDictForKey:key][NSStringFromClass(self)] = array = [NSMutableArray array];
         
         if ([self respondsToSelector:selector]) {
 #pragma clang diagnostic push