nscharacterset

I have the need to parse some unknown data which should just be a numeric value, but may contain whitespace or other non-alphanumeric characters. Is there a new way of doing this in Swift? All I can find online seems to be the old C way of doing things. I am looking at stringByTrimmingCharactersInSet - as I am sure my inputs will only have whitespace/special characters at the start or end of the string. Are there any built in character sets I can use for this? Or do I need to create my own? I was hoping there would be something like stringFromCharactersInSet() which would allow me to specify

I'm looking for a quick and easy way to strip non-alphanumeric characters from an NSString . Probably something using an NSCharacterSet , but I'm tired and nothing seems to return a string containing only the alphanumeric characters in a string. We can do this by splitting and then joining. Requires OS X 10.5+ for the componentsSeparatedByCharactersInSet: NSCharacterSet *charactersToRemove = [[NSCharacterSet alphanumericCharacterSet] invertedSet]; NSString *strippedReplacement = [[someString componentsSeparatedByCharactersInSet:charactersToRemove] componentsJoinedByString:@""]; In Swift, the

I was using this, in Swift 1.2 let urlwithPercentEscapes = myurlstring.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding) This now gives me a warning asking me to use stringByAddingPercentEncodingWithAllowedCharacters I need to use a NSCharacterSet as an argument, but there are so many and I cannot determine what one will give me the same outcome as the previously used method. An example URL I want to use will be like this http://www.mapquestapi.com/geocoding/v1/batch?key=YOUR_KEY_HERE&callback=renderBatch&location=Pottsville,PA&location=Red Lion&location=19036&location=1090 N

Currently I am able to make array of Alphabets like below [[NSArray alloc]initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K",@"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z",nil]; Knowing that is available over [NSCharacterSet uppercaseLetterCharacterSet] How to make an array out of it? The following code creates an array containing all characters of a given character set. It works also for characters outside of the "basic multilingual plane" (characters > U+FFFF, e.g. U+10400 DESERET CAPITAL LETTER LONG I). NSCharacterSet *charset =