On 12.02.2012, at 23:02, David Delmonte wrote:
> I have a search box, and need to parse out some special characters (' and \).
Do you? In most cases, ignoring some of the user's input just leads to wrong
result. Instead, you should determine how to correctly escape the given
characters so they make it through as text instead of doing something special.
E.g. for an SQLite query, you usually just have to prefix special characters
with a backslash (and any backslashes you want to go through verbatim as well,
so they can be told from "special character"-backslashes).
> The search bar text is sbar.text.. How do I interrupt the string before it is
> sent and remove (or warn) of these characters... ? Many thanks..
>
> I've tried this:
>
> if ([sbar.text isEqualToString:(@"'")] || [sbar.text
> isEqualToString:(@"\\")]) {
> NSLog(@"Found You");
> sbar.text = nil;
>
> (This works when the characters are first in the string..)
Your code above compares the entire string to another entire string. Unless
the string only consists of a tick mark, or only of one backslash, this won't
match. You have to use a call that searches the string for a substring, like
rangeOfString:...
> and this:
>
> NSString *protectedString1 = sbar.text;
> NSString *protectedString2 = [protectedString1
> stringByReplacingOccurrencesOfString:@"'" withString:@" "];
> sbar.text = protectedString2;
>
> But this loops :)
What do you mean "it loops" ? This should replace any tick marks with spaces in
your string. What were you expecting it to do ... ?
Cheers,
-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."
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