程序go 2010-03-18 06:17 采纳率: 100%
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将 UTF-8编码的 NSData 转换为 NSString

I have UTF-8 encoded NSData from windows server and I want to convert it to NSString for iPhone. Since data contains characters (like a degree symbol) which have different values on both platforms, how do I convert data to string?

转载于:https://stackoverflow.com/questions/2467844/convert-utf-8-encoded-nsdata-to-nsstring

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  • csdnceshi62 2010-03-18 06:20
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    If the data is not null-terminated, you should use -initWithData:encoding:

    NSString* newStr = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding];
    

    If the data is null-terminated, you should instead use -stringWithUTF8String: to avoid the extra \0 at the end.

    NSString* newStr = [NSString stringWithUTF8String:[theData bytes]];
    

    (Note that if the input is not properly UTF-8-encoded, you will get nil.)


    Swift variant:

    let newStr = String(data: data, encoding: .utf8)
    // note that `newStr` is a `String?`, not a `String`.
    

    If the data is null-terminated, you could go though the safe way which is remove the that null character, or the unsafe way similar to the Objective-C version above.

    // safe way, provided data is \0-terminated
    let newStr1 = String(data: data.subdata(in: 0 ..< data.count - 1), encoding: .utf8)
    // unsafe way, provided data is \0-terminated
    let newStr2 = data.withUnsafeBytes(String.init(utf8String:))
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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