iOS - 数据持久化---- NSUserDefaults & NSKeyedArchiver

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原创最新推荐文章于 2026-07-14 22:19:50 发布 639 阅读 AI 写同款· GEO 优化 ›

iOS NSKeyedArchiver序列化后进行数据持久化（swift） NSKeyedArchiver序列化就我简单理解就是把iOS中的类转换为二进制数据，我们可以方便的把而进制数据存起来。接下来分别以iOS原有的类和自定义的类序列化存储做简单的说明：使用NSUserDefaults存储一个很小的图片，当然了我们要知道实际存储的是一个二进制数据所以我们需要序列化：将图片转换为二进制数据 NSKeyedArchiver.archivedDataWithRootObje 阅读详情

NSUserDefaults

//1、获取一个NSUserDefaults引用：
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
//2、保存数据
[userDefaults setInteger:1 forKey:@"segment"];
[userDefaults synchronize];
//3、读取数据
NSInteger i = [userDefaults integerForKey:@"segment"];

NSKeyedArchiver

// 数据源
NSString *str = @"abc";
NSString *astr = @"efg";
NSArray *array = [NSArray arrayWithObjects:str, astr, nil];
// 保存数据
NSString *Path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filename = [Path stringByAppendingPathComponent:@"test.plist"];
[NSKeyedArchiver archiveRootObject:array toFile:filename];
str = @"a";
astr = @"";
//加载数据
NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile: filename];
str = [arr objectAtIndex:0];
astr =  [arr objectAtIndex:1];
NSLog(@"str:%@",str);
NSLog(@"astr:%@",astr);

NSUserDefaults + NSKeyedArchiver

//保存数据：
NSData *objColor = [NSKeyedArchiver archivedDataWithRootObject:[UIColor redColor]];
[[NSUserDefaults standardUserDefaults]setObject:objColor forKey:@"myColor"];
//读取数据：
NSData *objColor = [[NSUserDefaults standardUserDefaults]objectForKey:@"myColor"];
UIColor *myColor = [NSKeyedUnarchiver unarchiveObjectWithData:objColor];