diff --git a/SUIMVVMDemo/.DS_Store b/SUIMVVMDemo/.DS_Store
index 63c5dc5..822277a 100644
Binary files a/SUIMVVMDemo/.DS_Store and b/SUIMVVMDemo/.DS_Store differ
diff --git a/SUIMVVMKit/SUIMVVMKit/NSObject+SMKCoding.m b/SUIMVVMKit/SUIMVVMKit/NSObject+SMKCoding.m
index acbc2cf..5c4fa75 100644
--- a/SUIMVVMKit/SUIMVVMKit/NSObject+SMKCoding.m
+++ b/SUIMVVMKit/SUIMVVMKit/NSObject+SMKCoding.m
@@ -1,6 +1,6 @@
 //
 //  NSObject+SMKCoding.m
-//  SMKMVVM
+//  TestSql
 //
 //  Created by yuantao on 16/4/29.
 //  Copyright © 2016年 momo. All rights reserved.
@@ -18,7 +18,7 @@ + (BOOL)supportsSecureCoding {
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wobjc-designated-initializers"
 - (instancetype)initWithCoder:(NSCoder *)aDecoder {
-      [self setWithCoder:aDecoder];
+    [self setWithCoder:aDecoder];
     return self;
 }
 #pragma clang diagnostic pop
@@ -38,14 +38,22 @@ - (void)setWithCoder:(NSCoder *)aDecoder {
 }
 
 - (NSDictionary *)getPropertiesDict {
-
+    
     Class class = [self class];
     unsigned int propertyCount;
     __autoreleasing NSMutableDictionary *propertiesDict = [NSMutableDictionary dictionary];
     objc_property_t *properties = class_copyPropertyList(class, &propertyCount);
-
-    NSArray *allowedCodingPropertyNames = [class smk_allowedCodingPropertyNames];
-    NSArray *ignoredCodingPropertyNames = [class smk_ignoredCodingPropertyNames];
+    
+    NSArray *allowedCodingPropertyNames = nil;
+    if ([self respondsToSelector:@selector(smk_allowedCodingPropertyNames)]) {
+        allowedCodingPropertyNames = [class smk_allowedCodingPropertyNames];
+    }
+    
+    NSArray *ignoredCodingPropertyNames = nil;
+    if ([self respondsToSelector:@selector(smk_ignoredCodingPropertyNames)]) {
+        ignoredCodingPropertyNames = [class smk_ignoredCodingPropertyNames];
+    }
+    
     
     void(^setValueBlock)(NSString *key, NSMutableDictionary *propertiesDict) = ^(NSString *key, NSMutableDictionary *propertiesDict) {
         if (![ignoredCodingPropertyNames containsObject:key]) {
@@ -75,7 +83,7 @@ - (NSDictionary *)getPropertiesDict {
         const char *propertyName = property_getName(property);
         __autoreleasing NSString *key = @(propertyName);
         setValueBlock(key, propertiesDict);
-   
+        
     }
     
     free(properties);
@@ -105,9 +113,9 @@ - (BOOL)smk_writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile {
 }
 
 + (instancetype)smk_objectWithFile:(NSString *)path {
-
+    
     NSData *data = [NSData dataWithContentsOfFile:path];
-
+    
     id object = nil;
     if (data) {
         NSPropertyListFormat format;
diff --git a/SUIMVVMKit/SUIMVVMKit/SMKAction.m b/SUIMVVMKit/SUIMVVMKit/SMKAction.m
index c8d9c7e..9baf7d0 100644
--- a/SUIMVVMKit/SUIMVVMKit/SMKAction.m
+++ b/SUIMVVMKit/SUIMVVMKit/SMKAction.m
@@ -31,29 +31,29 @@ @interface SMKAction ()
 
 @implementation SMKAction
 
-static id _instace;
+static id _instance;
 
 + (id)allocWithZone:(struct _NSZone *)zone
 {
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
-        _instace = [super allocWithZone:zone];
+        _instance = [super allocWithZone:zone];
     });
-    return _instace;
+    return _instance;
 }
 
 + (instancetype)sharedAction
 {
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
-        _instace = [[self alloc] init];
+        _instance = [[self alloc] init];
     });
-    return _instace;
+    return _instance;
 }
 
 - (id)copyWithZone:(NSZone *)zone
 {
-    return _instace;
+    return _instance;
 }
 
 - (AFHTTPSessionManager *)sessionManager {