Regex to grab a number from within a string
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I would like to grab a number from a string.

The string is:  `"responseID: 1 is the return value";`

Sometimes the number could be 1, or 3, 300, 3000...

I am trying to do this in objective C for the iphone.

I've tried `NSPredicate` and `NSRegularExpression`, but I can not seem to get the right regex to start with.

I tried `"*[0-9]+*"`;

Does this return the "1" , "300" or whatever number to me when I call the regex?  

Thank you!