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NSUserdefaultsにNSMutablearrayを格納する/読み出す

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  • 格納
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
    NSMutableArray *array = [[NSMutableArray alloc] init];
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:array];
    [ud setObject:data forKey:@"array_key"];

MutableArrayの名前がarray, array_keyは読み出すときのkey.

  • 読み出し
 NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
    NSData *data = [ud objectForKey:@"array_key"];
    NSMutableArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:data];

あとは煮るなり焼くなり。
要素を変更したときは、格納コードをもう一回書いて、
[ud synchronize];
しましょう。

tomokr
さいきんswiftを勉強している
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