特別なキャラクターが存在する場合、nsmutabledataからnsstring変換が失敗します
https://stackoverflow.com/questions/4307455
-
29-09-2019 - |
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HTTPサーバーインターフェイスを介してDirectVレシーバーと対話するアプリを作成しています。デバイスを照会し、Sjonフォーマットされた応答を取得できます。
これが私のサンプルコードです：
- (NSDictionary *) readDVRData
{
NSMutableData *rData = [[NSMutableData alloc] initWithContentsOfFile:@"./data"];
//NSLog(@"rData = %@",rData);
NSString *rString = [[NSString alloc] initWithData:rData encoding:NSUTF8StringEncoding];
NSLog(@"rString = %@",rString);
NSError *error;
SBJSON *json = [[SBJSON new] autorelease];
NSDictionary *response = [json objectWithString:rString error:&error];
//NSLog(@"response = %@",response);
return response;
}
テストのために、データファイルへの応答を保存し、上記の例で読んでいます。 nsmutabledataからnsstringへの変換：
NSString *rString = [[NSString alloc] initWithData:rData encoding:NSUTF8StringEncoding];
次の文字が配置されている場合、失敗します。 È のように クレームフレーシュ. 。参照のために、これはサウスパークの録音のエピソードティットと説明にありました。
このキャラクターを「E」だけに変更すると、変換は機能します。このようなものをキャッチするために使用する必要がある別の方法はありますか？または、このようなキャラクターを削除する簡単な方法はありますか？コンバージョンを失敗させる可能性のあるアクセントマークか何か違うものであるかどうか、私は前に知りません。
ありがとう、デイブ
それが必要な場合、データファイルのスニペット。テキスト全体を含めますが、30000の制限を超える文字制限を押します。
{
"groupId": "1 1 381C3",
"groupTitle": "South Park",
"isRecording": false,
"numItems": 10,
"numNewItems": 10,
"programs": [
{
"callsign": "COMHD",
"contentId": "1 1 381C3 198",
"description": "\"CrÈme Fraiche\" Animation, Comedy. (2010) Trey Parker, Matt Stone. Randy's obsession with the Food Network forces Sharon to explore a new interest of her own. Series.",
"duration": 1800,
"episodeTitle": "CrÈme Fraiche",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6937756",
"rating": "TV-MA-L",
"startTime": 1290056400,
"title": "South Park",
"uniqueId": "5397375192530140068"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 197",
"description": "\"Coon vs. Coon & Friends\" Animation, Comedy. (2010) Trey Parker, Matt Stone. Coon and Friends find themselves at the mercy of Cartman who now has the dark lord doing his bidding; Kenny wrestles with the curse of his super power. Series.",
"duration": 1800,
"episodeTitle": "Coon vs. Coon & Friends",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6918387",
"rating": "TV-MA-L",
"startTime": 1289444400,
"title": "South Park",
"uniqueId": "8476957599452610419"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 196",
"description": "\"Mysterion Rises\" Animation, Comedy. (2010) Trey Parker, Matt Stone. Mysterion's true identity is revealed; scorned by fellow superheroes, one goes out for revenge. Series.",
"duration": 1800,
"episodeTitle": "Mysterion Rises",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6896823",
"rating": "TV-MA-L",
"startTime": 1288843200,
"title": "South Park",
"uniqueId": "2113731123121326471"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 0",
"description": "Animation, Comedy. Trey Parker, Matt Stone. The adventures of four boys who live in South Park, Colo. Series.",
"duration": 1800,
"episodeTitle": "",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6830127",
"rating": "TV-MA-L",
"startTime": 1288751400,
"title": "South Park",
"uniqueId": "2166056034991125062"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 195",
"description": "\"Coon 2: Hindsight\" Animation, Comedy. (2010) Trey Parker, Matt Stone. Coon and friends set out to help the victims of BP's latest catastrophic drilling accident in the Gulf. Series.",
"duration": 1800,
"episodeTitle": "Coon 2: Hindsight",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6876407",
"rating": "TV-MA-L",
"startTime": 1288238400,
"title": "South Park",
"uniqueId": "8615834721021879366"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 194",
"description": "\"Insheeption\" Animation, Comedy. (2010) Trey Parker, Matt Stone. When Stan is sent to the school counselor because he's holding on to an obscene number of useless possessions, he realizes that Mr. Mackey had a hoarding disorder too. Series.",
"duration": 1783,
"episodeTitle": "Insheeption",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6857628",
"rating": "TV-MA-L",
"startTime": 1287626416,
"title": "South Park",
"uniqueId": "1547798106243799673"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 193",
"description": "\"It's a Jersey Thing\" Animation, Comedy. (2010) Trey Parker, Matt Stone. New Jersey is taking over the nation one state at a time, Randy and the boys take a stand as the Jerseyites approach South Park. Series.",
"duration": 1800,
"episodeTitle": "It's a Jersey Thing",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6839243",
"rating": "TV-MA-L",
"startTime": 1287028800,
"title": "South Park",
"uniqueId": "8123622337314668826"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 193",
"description": "\"It's a Jersey Thing\" Animation, Comedy. (2010) Trey Parker, Matt Stone. New Jersey is taking over the nation one state at a time, Randy and the boys take a stand as the Jerseyites approach South Park. Series.",
"duration": 1784,
"episodeTitle": "It's a Jersey Thing",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6839243",
"rating": "TV-MA-L",
"startTime": 1287021615,
"title": "South Park",
"uniqueId": "949183344652655207"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 0",
"description": "Animation, Comedy. Trey Parker, Matt Stone. The adventures of four boys who live in South Park, Colo. Series.",
"duration": 1800,
"episodeTitle": "",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6830127",
"rating": "TV-MA-L",
"startTime": 1286937000,
"title": "South Park",
"uniqueId": "7841891672059226043"
},
{
"callsign": "COMHD",
"contentId": "1 1 381C3 0",
"description": "Animation, Comedy. Trey Parker, Matt Stone. The adventures of four boys who live in South Park, Colo. Series.",
"duration": 1800,
"episodeTitle": "",
"expiration": "0",
"isHd": true,
"isPartial": false,
"isPpv": false,
"isRecording": false,
"isViewed": false,
"isVod": false,
"keepUntilFull": true,
"major": 249,
"minor": 65535,
"programId": "6830127",
"rating": "TV-MA-L",
"startTime": 1286856000,
"title": "South Park",
"uniqueId": "3872435936942587460"
}
]
}
解決
Nsisolatin1stringencodingなど、他のエンコーディングを試しましたか？
他のヒント
これは、Webサーバーからのエンコーディングの問題である可能性があります。あなたはUTF-8データを期待していますが、それは彼らがあなたに送っているものではないと思います。 [nsstring stringwithcontentsoffile：]を使用して読んでみてください。代わりに、何かが変化するかどうかを確認してください。
その方法が非推奨であるため、コンパイラは警告を投げます。実際、StringWithContentsOffile：usedencoding：error：代わりに使用できますが、私と他の人は、完全にエンコードされていないデータの古い方法と同様に機能していないように見えると報告しています（つまり、Webの90％はWebの90％ :-)）。
DirectVユニットの応答でHTTPヘッダーを確認してください。おそらくUTF-8を使用していません。使用しているエンコードを把握し、正しい定数を供給します initWithData:encoding:.
コマンドを使用できます curl -i http：// directv-data-url HTTPヘッダーを表示します。
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