Re: problem with NSString's stringByReplacingOccurrencesOfString

[Tom Davie]

On 11 Nov 2012, at 13:07, "Sebastian Reitenbach" 
<sebastia@l00-bugdead-prods.de> wrote:

> Hi,
> 
> I try to replace "'" with "\'", and also "\\" with "\\\\" using NSString's 
> stringByReplacingOccurrencesOfString.
> 
> When I for example do this:
> escapedFileName = [@"this is a string blah" 
> stringByReplacingOccurrencesOfString:@"blah" withString:@"blubb"];
> NSLog(@"escapedFileName: %@", escapedFileName);
> 
> Then it prints out:
> escapedFileName: this is a string blubb
> 
> So far, so good.
> 
> but when I then try to:
> escapedFileName = [@"this is a string' blah" 
> stringByReplacingOccurrencesOfString:@"'" withString:@"\'"];
> then the NSLog prints out:
> escapedFileName: this is a string' blah

You have missed a quote, @"\'" is the string containing only a single quote, so 
you're asking it to replace quotes with the same quotes.
You wanted @"\'" in the first instance, and @"\\\'" in the second.

Tom Davie