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swiftnumbersfindreturnlocation

Find number in string and return location and length

let myStr = "I have 4.34 apples."

I need the location range and the length, because I'm using NSRange(location:, length:) to bold the number 4.34

extension String{
    func findNumbersAndBoldThem()->NSAttributedString{
         //the code
    }
}
Solution

  • My suggestion is also based on regular expression but there is a more convenient way to get NSRange from Range<String.Index>

    let myStr = "I have 4.34 apples."
if let range = myStr.range(of: "\\d+\\.\\d+", options: .regularExpression) {
    let nsRange = NSRange(range, in: myStr)
    print(nsRange)
}

    If you want to detect integer and floating point values use the pattern

    "\\d+(\\.\\d+)?"

    The parentheses and the trailing question mark indicate that the decimal point and the fractional digits are optional.