TestModel.h 文件 列举了4个类型 NSString、BOOL、NSNumber、Object

#import <Foundation/Foundation.h>
#import "TestSubModel.h"

@interface TestModel : NSObject <NSSecureCoding>

@property (nonatomic ,strong) NSString * name;

@property (nonatomic ,assign) NSInteger age;

@property (nonatomic ,assign) BOOL isSelect;

@property (nonatomic ,strong) TestSubModel *subModel;

@end

TestModel.m 文件

#import "TestModel.h"

@implementation TestModel

- (nullable instancetype)initWithCoder:(nonnull NSCoder *)coder
{
    if (self == [super init]) {
        

        self.name = [coder decodeObjectOfClass:[NSString class] forKey:NSStringFromSelector(@selector(name))];
        self.age = [[coder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(age))] unsignedIntegerValue];
        self.isSelect = [coder decodeBoolForKey:NSStringFromSelector(@selector(isSelect))];
        self.subModel = [coder decodeObjectOfClass:[TestSubModel class] forKey:NSStringFromSelector(@selector(subModel))];
        
        
    }
    return self;
}
- (void)encodeWithCoder:(NSCoder *)coder
{

    [coder encodeObject:self.name forKey:NSStringFromSelector(@selector(name))];
    [coder encodeObject:[NSNumber numberWithUnsignedInteger:self.age] forKey:NSStringFromSelector(@selector(age))];
    [coder encodeBool:self.isSelect forKey:NSStringFromSelector(@selector(isSelect))];
    [coder encodeObject:self.subModel forKey:NSStringFromSelector(@selector(subModel))];
    
}
// 这个需要返回YES
+ (BOOL)supportsSecureCoding
{
    return YES;
}


@end

TestSubModel.h 文件

#import <Foundation/Foundation.h>

@interface TestSubModel : NSObject <NSSecureCoding>

@property (nonatomic ,strong) NSString * xiao;

@property (nonatomic ,assign) NSInteger shuzi;

@end

发现上面的TestModel 如果写MJExtension 的方法最后解档取值是空，但是子模型可以写 MJExtension的归解档方法

TestSubModel.m 文件

#import <MJExtension.h>
@implementation TestSubModel

- (nullable instancetype)initWithCoder:(nonnull NSCoder *)coder
{
    if (self == [super init]) {
        
        [self mj_decode:coder];
    }
    return self;
}
- (void)encodeWithCoder:(NSCoder *)coder
{
    [self mj_encode:coder];
}
// 这个需要返回YES
+ (BOOL)supportsSecureCoding
{
    return YES;
}
@end

归档

NSError * error;
    NSData * data = [NSKeyedArchiver archivedDataWithRootObject:model requiringSecureCoding:YES error:&error];

解档

 TestModel * result = (TestModel*)[NSKeyedUnarchiver unarchivedObjectOfClass:[TestModel class] fromData:data error:&error];
    NSLog(@"---result-------%li-%@ %i- %@ -%li--------",result.age,result.name,result.isSelect,result.subModel.xiao,result.subModel.shuzi);