some typo (#773)

Author: kinarobin

MJExtension/MJProperty.m

@@ -147,7 +147,7 @@ - (void)setOriginKey:(id)originKey forClass:(Class)c
     if ([originKey isKindOfClass:[NSString class]]) { // 字符串类型的key
         NSArray *propertyKeys = [self propertyKeysWithStringKey:originKey];
         if (propertyKeys.count) {
-            [self setPorpertyKeys:@[propertyKeys] forClass:c];
+            [self setPropertyKeys:@[propertyKeys] forClass:c];
         }
     } else if ([originKey isKindOfClass:[NSArray class]]) {
         NSMutableArray *keyses = [NSMutableArray array];
@@ -158,13 +158,13 @@ - (void)setOriginKey:(id)originKey forClass:(Class)c
             }
         }
         if (keyses.count) {
-            [self setPorpertyKeys:keyses forClass:c];
+            [self setPropertyKeys:keyses forClass:c];
         }
     }
 }
 
 /** 对应着字典中的多级key */
-- (void)setPorpertyKeys:(NSArray *)propertyKeys forClass:(Class)c
+- (void)setPropertyKeys:(NSArray *)propertyKeys forClass:(Class)c
 {
     if (propertyKeys.count == 0) return;
     NSString *key = NSStringFromClass(c);

MJExtension/NSObject+MJProperty.m

@@ -140,35 +140,32 @@ + (NSMutableArray *)mj_properties
 {
     NSMutableArray *cachedProperties = [self mj_propertyDictForKey:&MJCachedPropertiesKey][NSStringFromClass(self)];
     if (cachedProperties == nil) {
-    
-        if (cachedProperties == nil) {
-            cachedProperties = [NSMutableArray array];
+        cachedProperties = [NSMutableArray array];
+        
+        [self mj_enumerateClasses:^(__unsafe_unretained Class c, BOOL *stop) {
+            // 1.获得所有的成员变量
+            unsigned int outCount = 0;
+            objc_property_t *properties = class_copyPropertyList(c, &outCount);
 
-            [self mj_enumerateClasses:^(__unsafe_unretained Class c, BOOL *stop) {
-                // 1.获得所有的成员变量
-                unsigned int outCount = 0;
-                objc_property_t *properties = class_copyPropertyList(c, &outCount);
-                
-                // 2.遍历每一个成员变量
-                for (unsigned int i = 0; i<outCount; i++) {
-                    MJProperty *property = [MJProperty cachedPropertyWithProperty:properties[i]];
-                    // 过滤掉Foundation框架类里面的属性
-                    if ([MJFoundation isClassFromFoundation:property.srcClass]) continue;
-                    // 过滤掉`hash`, `superclass`, `description`, `debugDescription`
-                    if ([MJFoundation isFromNSObjectProtocolProperty:property.name]) continue;
-                    
-                    property.srcClass = c;
-                    [property setOriginKey:[self mj_propertyKey:property.name] forClass:self];
-                    [property setObjectClassInArray:[self mj_propertyObjectClassInArray:property.name] forClass:self];
-                    [cachedProperties addObject:property];
-                }
+            // 2.遍历每一个成员变量
+            for (unsigned int i = 0; i<outCount; i++) {
+                MJProperty *property = [MJProperty cachedPropertyWithProperty:properties[i]];
+                // 过滤掉Foundation框架类里面的属性
+                if ([MJFoundation isClassFromFoundation:property.srcClass]) continue;
+                // 过滤掉`hash`, `superclass`, `description`, `debugDescription`
+                if ([MJFoundation isFromNSObjectProtocolProperty:property.name]) continue;
 
-                // 3.释放内存
-                free(properties);
-            }];
+                property.srcClass = c;
+                [property setOriginKey:[self mj_propertyKey:property.name] forClass:self];
+                [property setObjectClassInArray:[self mj_propertyObjectClassInArray:property.name] forClass:self];
+                [cachedProperties addObject:property];
+            }
 
-            [self mj_propertyDictForKey:&MJCachedPropertiesKey][NSStringFromClass(self)] = cachedProperties;
-        }
+            // 3.释放内存
+            free(properties);
+        }];
+        
+        [self mj_propertyDictForKey:&MJCachedPropertiesKey][NSStringFromClass(self)] = cachedProperties;
     }
 
     return cachedProperties;