Re: NSString vs. encoding

[Johan Kool]

Op 15 sep 2009, om 23:15 heeft Johan Kool het volgende geschreven:
Op 15 sep 2009, om 22:26 heeft Stephen J. Butler het volgende  
geschreven:
On Wed, Sep 16, 2009 at 12:10 AM, Johan Kool <johank...@gmail.com>  
wrote:
Op 15 sep 2009, om 21:50 heeft Jens Alfke het volgende geschreven:
On Sep 15, 2009, at 9:04 PM, Johan Kool wrote:
NSString *stringA = @"hello\040world";
NSString *stringB =  [NSString stringWithUTF8String:"hello 
\040world"] ;

I'm confused. '\040' is a regular ascii space character (040 = 32
decimal). What's unusual about either of these strings?

Sorry, I was confused by what the actual content of the NSString  
was in my
app. It turned out it was @"hello\\040world". I would still like  
to get that
to print as "hello world" though, not "hello\040world".

Well... that's not UTF-8, for sure. You might call it ANSI C string
encoding. Looks like Foundation can handle escapes like this as
NSNonLossyASCIIStringEncoding.

Thanks! That was the nudge in the right direction. The code below  
gave me what I was after.

NSString *stringA = @"hello\\040world";
NSData *data = [stringA dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"%@", [[[NSString alloc] initWithData:data  
encoding:NSNonLossyASCIIStringEncoding] autorelease]);

Too early... turns out it only works for spaces (\040). For other  
special characters I still have an encoding issue, that I can't seem  
to work out.

NSString *stringA = @"J\\303\\270ha\\314\\212n\\040i\\314\\210s\\040Li\ 
\314\\200e\\314\\201\\306\\222";
NSLog(@"stringA %@ (expected Jøhån ïs Lìéƒ)", stringA);

NSData *data = [stringA dataUsingEncoding:NSASCIIStringEncoding];
NSString *stringB = [[[NSString alloc] initWithData:data  
encoding:NSNonLossyASCIIStringEncoding] autorelease];
NSLog(@"stringB %@ (expected Jøhån ïs Lìéƒ)", stringB);


> stringA J\303\270ha\314\212n\040i\314\210s\040Li\314\200e 
\314\201\306\222 (expected Jøhån ïs Lìéƒ)
> stringB Jøhån ïs Lìéƒ (expected Jøhån ïs  
Lìéƒ)

Johan

---
http://www.johankool.nl/

KOOLISTOV - Software for Mac and iPhone
http://www.koolistov.net/




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