iOS开发之数据以及对象归档与解归档

来源：互联网发布：js base64 key 编辑：程序博客网时间：2024/05/16 11:19

在开发过程中，我们难免要做一些数据的存储，例如用户账户密码的存储方便下次一键登录，收藏功能的实现有时候也会用到存储本地，诸如此类很多，对于数据存储，归档五一是比较好用的方法，下面说一下在iOS开发过程中的归档与解归档,总结了两种方式：

//--------------------------1.第一种归档方式-------------------

/***归档对象****/
NSArray *array = @[@"abc",@"123",@1234];
NSString *homePath = NSHomeDirectory();
NSString *path = [homePath stringByAppendingPathComponent:@"test.arc"];
BOOL success = [NSKeyedArchiver archiveRootObject:array toFile:path];
if (success) {
NSLog(@"archive success");
}

归档后大家就能在沙盒目录里面看到归档后的文件test.arc，如果找不到该文件在哪里，可以将path进行打印输出看一下，

NSLog("test.arc的路径在%@",path);

//**解归档***
NSString *homePath = NSHomeDirectory();
NSString *path = [homePath stringByAppendingPathComponent:@"test.arc"];
NSArray *array = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
NSLog(@"%@",array);

//-----------------------2.第二种归档方式-----------------------
//归档对象//
NSString homePath = NSHomeDirectory();
NSString path = [homePath stringByAppendingPathComponent:@"archiver2.archiv"];
NSMutableData data = [NSMutableData data];
NSKeyedArchiver archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
NSArray array = @[@"jack",@"tom"];
[archiver encodeInt:100 forKey:@"age"];
[archiver encodeObject:array forKey:@"names"];
[archiver finishEncoding];
[archiver release];

BOOL success = [data writeToFile:path atomically:YES];
if (success) {
NSLog(@"archive success");
}

/***解归档对象**/
NSString *homePath = NSHomeDirectory();
NSString *path = [homePath stringByAppendingPathComponent:@"archiver2.archiv"];
NSData *data = [NSData dataWithContentsOfFile:path];
NSKeyedUnarchiver *unArchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
int age = [unArchiver decodeIntForKey:@"age"];
NSArray *names = [unArchiver decodeObjectForKey:@"names"];
[unArchiver release];
NSLog(@"age=%d,names=%@",age,names);

demo下载：

链接: http://pan.baidu.com/s/14Lc4Y 密码: 8diu

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