CoderMJLee · TouchFriend · Jun 19, 2026
diff --git a/MJExtension.xcodeproj/project.pbxproj b/MJExtension.xcodeproj/project.pbxproj
@@ -57,6 +57,8 @@
 		2D2DBA832317DBE0005A689E /* MJAd.m in Sources */ = {isa = PBXBuildFile; fileRef = 2D2DBA732317DBDF005A689E /* MJAd.m */; };
 		2D2DBA842317DBE0005A689E /* MJExtensionConfig.m in Sources */ = {isa = PBXBuildFile; fileRef = 2D2DBA752317DBDF005A689E /* MJExtensionConfig.m */; };
 		2D2DBA852317DBE0005A689E /* MJPerson.m in Sources */ = {isa = PBXBuildFile; fileRef = 2D2DBA772317DBDF005A689E /* MJPerson.m */; };
+		BF76218C2FE4C63A008FC9C3 /* MJWife.m in Sources */ = {isa = PBXBuildFile; fileRef = BF76218B2FE4C63A008FC9C3 /* MJWife.m */; };
+		BF76218F2FE4C700008FC9C3 /* MJWomen.m in Sources */ = {isa = PBXBuildFile; fileRef = BF76218E2FE4C700008FC9C3 /* MJWomen.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -140,6 +142,10 @@
 		2D2DBA762317DBDF005A689E /* MJBook.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MJBook.h; sourceTree = "<group>"; };
 		2D2DBA772317DBDF005A689E /* MJPerson.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = MJPerson.m; sourceTree = "<group>"; };
 		2D2DBA872317DCCF005A689E /* PrefixHeader.pch */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = PrefixHeader.pch; sourceTree = "<group>"; };
+		BF76218A2FE4C63A008FC9C3 /* MJWife.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MJWife.h; sourceTree = "<group>"; };
+		BF76218B2FE4C63A008FC9C3 /* MJWife.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MJWife.m; sourceTree = "<group>"; };
+		BF76218D2FE4C700008FC9C3 /* MJWomen.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MJWomen.h; sourceTree = "<group>"; };
+		BF76218E2FE4C700008FC9C3 /* MJWomen.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MJWomen.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -304,6 +310,10 @@
 				2D2DBA6E2317DBDF005A689E /* MJUser.m */,
 				0130EE7E233C56D8008D2386 /* MJFrenchUser.h */,
 				0130EE7F233C56D8008D2386 /* MJFrenchUser.m */,
+				BF76218A2FE4C63A008FC9C3 /* MJWife.h */,
+				BF76218B2FE4C63A008FC9C3 /* MJWife.m */,
+				BF76218D2FE4C700008FC9C3 /* MJWomen.h */,
+				BF76218E2FE4C700008FC9C3 /* MJWomen.m */,
 			);
 			path = Model;
 			sourceTree = "<group>";
@@ -488,6 +498,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				2D2DBA812317DBE0005A689E /* MJStatusResult.m in Sources */,
+				BF76218F2FE4C700008FC9C3 /* MJWomen.m in Sources */,
 				2D2DBA7C2317DBE0005A689E /* MJStudent.m in Sources */,
 				2D2DBA822317DBE0005A689E /* MJStatus.m in Sources */,
 				2D2DBA832317DBE0005A689E /* MJAd.m in Sources */,
@@ -507,6 +518,7 @@
 				2D2DBA7D2317DBE0005A689E /* MJBook.m in Sources */,
 				0107507E26E890C100AAEA10 /* CoreDataTests.swift in Sources */,
 				0107507826E88DD400AAEA10 /* MJCoreDataTestModel.xcdatamodeld in Sources */,
+				BF76218C2FE4C63A008FC9C3 /* MJWife.m in Sources */,
 				2D2DBA7A2317DBE0005A689E /* MJDog.m in Sources */,
 				01052EAD25F872D00049EC6F /* MultiThreadTests.swift in Sources */,
 			);

diff --git a/MJExtension/NSObject+MJCoding.m b/MJExtension/NSObject+MJCoding.m
@@ -44,7 +44,7 @@ - (void)mj_decode:(NSCoder *)decoder
         if ([ignoredCodingPropertyNames containsObject:property.name]) return;
 
         // fixed `-[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSNumber'(This will be disallowed in the future.)` warning.
-        Class genericClass = [property objectClassInArrayForClass:property.srcClass];
+        Class genericClass = [property objectClassInArrayForClass:[self class]];
         // If genericClass exists, property.type.typeClass would be a collection type(Array, Set, Dictionary). This scenario([obj, nil, obj, nil]) would not happened.
         NSSet *classes = [NSSet setWithObjects:NSNumber.class,
                           property.type.typeClass, genericClass, nil];

diff --git a/MJExtensionTests/MJExtensionTests.m b/MJExtensionTests/MJExtensionTests.m
@@ -21,6 +21,7 @@
 #import "MJCat.h"
 #import <MJExtensionTests-Swift.h>
 #import "MJPerson.h"
+#import "MJWife.h"
 
 @interface MJExtensionTests : XCTestCase
 
@@ -495,6 +496,45 @@ - (void)testCodingModelArrayProperty {
     XCTAssert(decodedPerson.books.count == 2);
 }
 
+- (void)testCodingModelArrayPropertyInInherit {
+    // 有 NSArray 属性 模型
+    MJWife *wife = [[MJWife alloc] init];
+    wife.name = @"Rose";
+    wife.weight = 66.0;
+
+    MJBag *bag1 = [[MJBag alloc] init];
+    bag1.name = @"小书包1";
+    bag1.price = 205;
+
+    MJBag *bag2 = [[MJBag alloc] init];
+    bag2.name = @"小书包2";
+    bag2.price = 205;
+
+    wife.books = @[@"book1", @"book2"];
+    wife.bags = @[bag1, bag2];
+
+    NSString *file = [NSTemporaryDirectory() stringByAppendingPathComponent:@"wife.data"];
+    NSError *error = nil;
+    // 归档
+    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:wife
+                                         requiringSecureCoding:YES
+                                                         error:&error];
+    XCTAssert(!error);
+    BOOL write = [data writeToFile:file atomically:true];
+    XCTAssert(write);
+
+    // 解档
+    NSData *readData = [NSFileManager.defaultManager contentsAtPath:file];
+    error = nil;
+    MJWife *decodedWife = [NSKeyedUnarchiver unarchivedObjectOfClass:[MJWife class]
+                                                                  fromData:readData
+                                                                     error:&error];
+    XCTAssert(!error);
+    XCTAssert(decodedWife.books.count == 2);
+    XCTAssert(decodedWife.bags.count == 2);
+}
+
+
 #pragma mark  统一转换属性名（比如驼峰转下划线）
 - (void)testReplacedKeyFromPropertyName121 {
     // 1.定义一个字典

diff --git a/MJExtensionTests/Model/MJWife.h b/MJExtensionTests/Model/MJWife.h
@@ -0,0 +1,21 @@
+//
+//  MJWife.h
+//  MJExtensionTests
+//
+//  Created by touchWorld on 2026/6/19.
+//  Copyright © 2026 MJ Lee. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "MJWomen.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MJWife : MJWomen
+
+@property (nonatomic, assign) double weight;
+
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/MJExtensionTests/Model/MJWife.m b/MJExtensionTests/Model/MJWife.m
@@ -0,0 +1,14 @@
+//
+//  MJWife.m
+//  MJExtensionTests
+//
+//  Created by touchWorld on 2026/6/19.
+//  Copyright © 2026 MJ Lee. All rights reserved.
+//
+
+#import "MJWife.h"
+
+@implementation MJWife
+
+@end
+
diff --git a/MJExtensionTests/Model/MJWomen.h b/MJExtensionTests/Model/MJWomen.h
@@ -0,0 +1,23 @@
+//
+//  MJWomen.h
+//  MJExtensionTests
+//
+//  Created by touchWorld on 2026/6/19.
+//  Copyright © 2026 MJ Lee. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "MJBag.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MJWomen : NSObject
+
+@property (nonatomic, copy) NSString *name;
+@property (strong, nonatomic) NSArray<NSString *> *books;
+@property (nonatomic, strong) NSArray<MJBag *> *bags;
+
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/MJExtensionTests/Model/MJWomen.m b/MJExtensionTests/Model/MJWomen.m
@@ -0,0 +1,22 @@
+//
+//  MJWomen.m
+//  MJExtensionTests
+//
+//  Created by touchWorld on 2026/6/19.
+//  Copyright © 2026 MJ Lee. All rights reserved.
+//
+
+#import "MJWomen.h"
+#import <MJExtension/MJExtension.h>
+
+// NSSecureCoding实现
+MJSecureCodingImplementation(MJWomen, YES)
+
+@implementation MJWomen
+
++ (NSDictionary *)mj_objectClassInArray {
+    return @{@"books": [NSString class],
+             @"bags": [MJBag class]};
+}
+
+@end