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Asked: 2026-05-27T07:02:57+00:00

I have the following issue: I enter data in a UITextField and then I

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I have the following issue:

I enter data in a UITextField and then I want to send it to a server. But the data I am entering may contain umlauts (ö, ä, ü, …). Then I get a wrong encoding when passing it to the server. But I am encoding it with UTF8.

NSString *s = @"ö";
NSLog(@"%@", s);
NSLog(@"%s", s.UTF8String);

What am I doing wrong? In the second line, I see a perfectly fine “ö”, but in the third line, I see this: √∂

There are a lot of encoding posts around the Internet, but nothing really solved the problem.

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1 Answer

  1. Editorial Team

    Are you encoding or decoding things properly when talking to your server?

    Remember that NSString has those wonderful functions:

    stringByAddingPercentEscapesUsingEncoding:

    and

    stringByReplacingPercentEscapesUsingEncoding:

    As for seeing garbage in that third NSLog line output, the “%s” in the format means NSLog is expecting a C-style collection of bytes and it might not be able to display high-ascii values properly. Whereas “%@” format in NSLogs means NSString objects and all string encodings should work properly for that.

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