寫在前方 筆者會用到之前文章的方法(自己封裝下)

注意：好久沒有使用歸解檔，一片warning。
貌似NSKeyedArchiver/NSKeyedUnarchiver被蘋果重新折騰了個遍，使用安全歸解檔，從iOS11-12起廢棄了不少方法，開發(fā)者需要重閱api。

一、歸檔(NSKeyedArchiver)(序列化/編碼)，把對象轉(zhuǎn)為字節(jié)碼，以文件的形式存儲到磁盤上；程序運(yùn)行過程中或者當(dāng)再次重寫打開程序的時候，可以通過解歸檔(NSKeyedUnarchiver)(反序列化/解碼)還原這些對象。

二、支持的存儲數(shù)據(jù)類型
幾乎任意類型，同時歸檔后的文件是加密的，所以歸檔文件的擴(kuò)展名可以隨意取。

三、相關(guān)代碼
(一)、歸解檔準(zhǔn)備類，遵循NSSecureCoding協(xié)議，實現(xiàn)三個方法:

- (void)encodeWithCoder:(NSCoder *)aCoder;
- (instancetype)initWithCoder:(NSCoder *)aDecoder;
+ (BOOL)supportsSecureCoding 

model類如下:

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface XLOneModel : NSObject <NSSecureCoding>

@property (nonatomic, strong) NSString *school;
@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) NSInteger age;

@end

NS_ASSUME_NONNULL_END



#import "XLOneModel.h"


@implementation XLOneModel

/*
 *MARK: -編碼
 */
- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeObject:self.school forKey:@"school"];
    [aCoder encodeObject:self.name forKey:@"name"];
    [aCoder encodeInteger:self.age forKey:@"age"];
}

/*
 *MARK: -解碼
 */
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    if (self = [super init]) {
        self.school = [aDecoder decodeObjectOfClass:[NSString class] forKey:@"school"];
        self.name   = [aDecoder decodeObjectOfClass:[NSString class] forKey:@"name"];
        self.age    = [aDecoder decodeIntegerForKey:@"age"];
    }
    return self;
}

/*
 *MARK: -支持安全編碼
 */
+ (BOOL)supportsSecureCoding {
    return YES;
}

@end

(二)、歸檔，解歸檔實現(xiàn)

//1、創(chuàng)建地址

    NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSString *archiverPath = [docPath stringByAppendingPathComponent:@"myFile/test.xlArchiver"];
    //見"寫在前方"
    [XLFileManagerTool creatFileWithPath:archiverPath];

//2、創(chuàng)建待歸檔的對象

    XLOneModel *archiverModel = [[XLOneModel alloc] init];
    archiverModel.school = @"第一中學(xué)";
    archiverModel.name = @"張三";
    archiverModel.age = 15;

//3、歸檔

    if (@available(iOS 11.0, *)) {
        //使用NSData存放歸檔數(shù)據(jù)
        NSError *error;
        NSData *archiverData = [NSKeyedArchiver archivedDataWithRootObject:archiverModel requiringSecureCoding:YES error:&error];
        if (error) {
            NSLog(@"Archiver Failed, errorInfo:%@", error);
        }
        BOOL isSuccess = [archiverData writeToFile:archiverPath atomically:YES];
        if (isSuccess) {
            NSLog(@"archiver success");
        }
    
    } else {
        // Fallback on earlier versions
        NSData *archiverData = [NSKeyedArchiver archivedDataWithRootObject:archiverModel];
        BOOL isSuccess = [archiverData writeToFile:archiverPath atomically:YES];
        if (isSuccess) {
            NSLog(@"archiver success");
        }
    }

//4、解檔

    NSData *unArchivedData = [NSData dataWithContentsOfFile:archiverPath];
    if (@available(iOS 11.0, *)) {
        NSError *error;
        XLOneModel *unArchivedModel = [NSKeyedUnarchiver unarchivedObjectOfClass:[XLOneModel class] fromData:unArchivedData error:&error];
        if (unArchivedModel == nil || error) {
            NSLog(@"解檔失敗:%@", error);
        } else {
            NSLog(@"解檔成功:%@ , %@, %ld",unArchivedModel.school, unArchivedModel.name,unArchivedModel.age);
        }
    
    } else {
        NSError *error;
        XLOneModel *unArchivedModel = [NSKeyedUnarchiver unarchiveObjectWithData:unArchivedData];
        if (unArchivedModel == nil) {
            NSLog(@"解檔失敗:%@", error);
        } else {
            NSLog(@"解檔成功:%@ , %@, %ld",unArchivedModel.school, unArchivedModel.name,unArchivedModel.age);
        }
    }