写在前方 笔者会用到之前文章的方法(自己封装下)
注意：好久没有使用归解档，一片warning。
貌似NSKeyedArchiver/NSKeyedUnarchiver被苹果重新折腾了个遍，使用安全归解档，从iOS11-12起废弃了不少方法，开发者需要重阅api。
一、归档(NSKeyedArchiver)(序列化/编码)，把对象转为字节码，以文件的形式存储到磁盘上；程序运行过程中或者当再次重写打开程序的时候，可以通过解归档(NSKeyedUnarchiver)(反序列化/解码)还原这些对象。
二、支持的存储数据类型
几乎任意类型，同时归档后的文件是加密的，所以归档文件的扩展名可以随意取。
三、相关代码
(一)、归解档准备类，遵循NSSecureCoding协议，实现三个方法:
- (void)encodeWithCoder:(NSCoder *)aCoder;
- (instancetype)initWithCoder:(NSCoder *)aDecoder;
+ (BOOL)supportsSecureCoding
model类如下:
#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: -编码
*/
- (void)encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeObject:self.school forKey:@"school"];
[aCoder encodeObject:self.name forKey:@"name"];
[aCoder encodeInteger:self.age forKey:@"age"];
}
/*
*MARK: -解码
*/
- (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: -支持安全编码
*/
+ (BOOL)supportsSecureCoding {
return YES;
}
@end
(二)、归档，解归档实现
//1、创建地址
NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSString *archiverPath = [docPath stringByAppendingPathComponent:@"myFile/test.xlArchiver"];
//见"写在前方"
[XLFileManagerTool creatFileWithPath:archiverPath];
//2、创建待归档的对象
XLOneModel *archiverModel = [[XLOneModel alloc] init];
archiverModel.school = @"第一中学";
archiverModel.name = @"张三";
archiverModel.age = 15;
//3、归档
if (@available(iOS 11.0, *)) {
//使用NSData存放归档数据
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、解档
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(@"解档失败:%@", error);
} else {
NSLog(@"解档成功:%@ , %@, %ld",unArchivedModel.school, unArchivedModel.name,unArchivedModel.age);
}
} else {
NSError *error;
XLOneModel *unArchivedModel = [NSKeyedUnarchiver unarchiveObjectWithData:unArchivedData];
if (unArchivedModel == nil) {
NSLog(@"解档失败:%@", error);
} else {
NSLog(@"解档成功:%@ , %@, %ld",unArchivedModel.school, unArchivedModel.name,unArchivedModel.age);
}
}