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，開發者需要重閱api。
一、歸檔(NSKeyedArchiver)(序列化/編碼)，把對象轉為字節碼，以文件的形式存儲到磁盤上；程序運行過程中或者當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、支持的存儲數據類型
幾乎任意類型，同時歸檔后的文件是加密的，所以歸檔文件的擴展名可以隨意取。
三、相關代碼
(一)、歸解檔準備類，遵循NSSecureCoding協議，實現三個方法:
- (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
//1、創建地址
NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSString *archiverPath = [docPath stringByAppendingPathComponent:@"myFile/test.xlArchiver"];
//見"寫在前方"
[XLFileManagerTool creatFileWithPath:archiverPath];
//2、創建待歸檔的對象
XLOneModel *archiverModel = [[XLOneModel alloc] init];
archiverModel.school = @"第一中學";
archiverModel.name = @"張三";
archiverModel.age = 15;
//3、歸檔
if (@available(iOS 11.0, *)) {
//使用NSData存放歸檔數據
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);
}
}