Problem with stringByTrimmingCharactersInSet:
I'm doing a very simple trimming from a string. Basically it goes like this:
int main (int argc, const char * argv[]) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *s = [[NSString alloc] initWithString:@"Some other string"];
s = [s stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSLog(@"%@",s);
[pool drain];
return 0;
}
No matter how many times I check, I can't find a mistake on the code. But the compiler keeps returning:
Running…
2009-12-30 08:49:22.086 Untitled[34904:a0f] Some other string
It doesn't trim the string at all. Is there a mistake in my code, because I can't believe something this simple doesn't work. Thanks!
Edit: I think I've figured my mistake. stringByTrimmingCharactersInSet only trims the string from the leftmost and rightmost e开发者_开发技巧nds of a string. Can anybody confirm this?
You are correct - with your code stingByTrimmingCharactersInSet will trim the left and right whitespace but leave internal whitespace alone.
Note that there's also a memory leak in your code sample:
NSString *s = [[NSString alloc] initWithString:@"Some other string"];
This will leak when you re-assign to s in the next line.
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