將base64轉換爲NSString

Question

我有這XMLbase64編碼格式。我想將它轉換爲NSString對象。我怎樣才能做到這一點？

PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4KPHN1cnZleSB4bWxuczphYmFw c3VydmV5PSJodHRwOi8vd3d3LnNhcC5jb20vYWJhcHN1cnZleSIgeG1sbnM6YmVlPSJodHRwOi8v d3d3LnNhcC5jb20vc3VydmV5L2JlZSIgeG1sbnM6Zm89Imh0dHA6Ly93d3cudzMub3JnLzE5OTkv WFNML0Zvcm1hdCIgeG1sbnM6aHRtbGI9Imh0dHA6Ly93d3cuc2FwLmNvbS9zdXJ2ZXkvaHRtbGIi IHhtbG5zOm91dD0iaHR0cDovL3d3dy53My5vcmcvMTk5OS9YU0wvT3V0cHV0IiB4bWxuczpzdnk9 Imh0dHA6Ly93d3cuc2FwLmNvbS9zdXJ2ZXkvc3Z5IiB4bWxuczp0bXA9Imh0dHA6Ly93d3cuc2Fw LmNvbS9zdXJ2ZXkvdG1wIiB4bWxuczp2YWx1ZXM9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkvWFNM L1RyYW5zZm9ybVZhbHVlcyIgeG1sbnM6d2ZmPSJodHRwOi8vd3d3Lm15c2 FwLmNvbS93ZmYvMjAw MSI + PHJhdGluZ2ZhY3Rvcj48cTE + MSA8L3ExPjxpZF8zNmYyN2YwY2UxNDY2MDRlOTIyMzY4Mjcy MWFhMjc5Yj4wIDwvaWRfMzZmMjdmMGNlMTQ2NjA0ZTkyMjM2ODI3MjFhYTI3OWI + PGlkX2Y3YWMx ODM4MDliNjAxNDE4MWVlNGEwNDIyNGYxNTNlPjAgPC9pZF9mN2FjMTgzODA5YjYwMTQxODFlZTRh MDQyMjRmMTUzZT48L3JhdGluZ2ZhY3Rvcj48cmF0aW5nPjxxMT48YTEgcmF0aW5nPSIxICI + aWRf ZTE1ZjhhNjQ5OTY3NDg0ZWI1MzUzZmI5NzIxYWY3NWY8L2ExPjxhMSByYXRpbmc9IjAgIj5pZF9h MzVhMWNmNzNjZmU5MDQ5YTYyMTYwMmFkOTA0NmE0NTwvYTE + PC9xMT48aWRfMzZmMjdmMGNlMTQ2 NjA0ZTkyMjM2ODI3MjFhYTI3OWI + PGlkXzgwMTVlNmQ0ZGRmYjkyNDE4ODcxMWIzMGE5MWQzZGU4 IE11bHRpcGxlQ2hvaWNlPSJ0cnVlIiByYXRpbmc9IjAgIj5pZF9lMjM0ZDMxM2M3MmRjMzQ2OGMx ODgzNGZhMzBiYzZhNjwvaWRfODAxNWU2ZDRkZGZiOTI0MTg4NzExYjMwYTkxZDNkZTg + PGlkXzgw MTVlNmQ0ZGRmYjkyNDE4ODcxMWIzMGE5MWQzZGU4IE11bHRpcGxlQ2hvaWNlPSJ0cnVlIiByYXRp bmc9IjAgIj5pZF9mYmU2MGUwMGUyMDliNzQyOTk1MjE1NDNiZDZlNzZjNzwvaWRfODAxNWU2ZDRk ZGZiOTI0MTg4NzExYjMwYTkxZDNkZTg + PGlkXzgwMTVlNmQ0ZGRmYjkyNDE4ODcxMWIzMGE5MWQz ZGU4IE11bHRpcGxlQ2hvaWNlPSJ0cnVlIiByYXRpbmc9IjAgIj5pZF80NDc0YTNjOWUwOWFkYjQ3 OTRiNDFiN2MyYTAxMzI2OTwvaWRfODAxNWU2ZDRkZGZiOTI0MTg4NzExYjMwYTkxZDNkZTg + PC9p ZF8zNmYyN2YwY2UxNDY2MDRlOTIyMzY4MjcyMWFhMjc5Yj48aWRfZjdhYzE4MzgwOWI2MDE0MTgx ZWU0YTA0MjI0ZjE1M2U + PGlkXzIwYTM4NDliMDAxMGI5NGFhYTRiYTQxMGE0ZDc2NmViIHJhdGlu Zz0iMCAiLz48L2lkX2Y3YWMxODM4MDliNjAxNDE4MWVlNGEwNDIyNGYxNTNlPjwvcmF0aW5nPjxy ZXN1bHQ + PHExPjxhMT5pZF9lMTVmOGE2NDk5Njc0ODRlYjUzNTNmYjk3MjFhZjc1ZjwvYTE + PC9x MT48aWRfMzZmMjdmMGNlMTQ2NjA0ZTkyMjM2ODI3MjFhYTI3OWI + PGlkXzgwMTVlNmQ0ZGRmYjky NDE4ODcxMWIzMGE5MWQzZGU4IE11bHRpcGxlQ2hvaWNlPSJ0cnVlIj4gPC9pZF84MDE1ZTZkNGRk ZmI5MjQxODg3MTFiMzBhOTFkM2RlOD48L2lkXzM2ZjI3ZjBjZTE0NjYwNGU5MjIzNjgyNzIxYWEy NzliPjxpZF9mN2FjMTgzODA5YjYwMTQxODFlZTRhMDQyMjRmMTUzZT48aWRfMjBhMzg0OWIwMDEw Yjk0YWFhNGJhNDEwYTRkNzY2ZWI + PC9pZF8yMGEzODQ5YjAwMTBiOTRhYWE0YmE0MTBhNGQ3NjZl Yj48L2lkX2Y3YWMxODM4MDliNjAxNDE4MWVlNGEwNDIyNGYxNTNlPjwvcmVzdWx0PjxyZXBsYWNl YWJsZXMvPjxzeXN0ZW1wYXJhbWxvY2F0aW9uPmh0dHA6Ly9TdXJ2ZXlSZXAvQ1JNX1NWWV9CU1Bf U1lTVEVNUEFSQU1fSEFSSVRfVEVTVC5YTUw8L3N5c3RlbXBhcmFtbG9jYXRpb24 + PGhpZGRlbi8 + PHJlYWRPbmx5Lz48bWFuZGF0b3J5Lz48bm9EaXNwbGF5Lz48YWRkSXRlbXMvPjxzY3JpcHQvPjxv bkV2ZW 50Lz48L3N1cnZleT4 =

Answer 1

在谷歌第二個結果是這樣的：

- (NSString *)base64Encode:(NSString *)plainText 
{ 
    NSData *plainTextData = [plainText dataUsingEncoding:NSUTF8StringEncoding]; 
    NSString *base64String = [plainTextData base64EncodedString]; 
    return base64String; 
} 
  
- (NSString *)base64Decode:(NSString *)base64String 
{ 
    NSData *plainTextData = [NSData dataFromBase64String:base64String]; 
    NSString *plainText = [[NSString alloc] initWithData:plainTextData encoding:NSUTF8StringEncoding]; 
    return plainText; 
} 

http://agerson.net/base64-encode-and-decode-nsstring-cocoa