objective c - Convert first number in an NSString into an Integer?

Question

I have an NSString like so:

@"200hello"

or

@"0 something"

What I would like to be able to do is take the first occuring number in the NSString and convert it into an int.

So that @"200hello" would become int = 200.

and @"0 something" would become int = 0.

Answer 1

int value;
BOOL success = [[NSScanner scannerWithString:@"1000safkaj"] scanInteger:&value];

If the number is not always at the beginning:

NSCharacterSet* nonDigits = [[NSCharacterSet decimalDigitCharacterSet] invertedSet];
int value = [[@"adfsdg1000safkaj" stringByTrimmingCharactersInSet:nonDigits] intValue];