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iKenndac/num.swift

Created January 31, 2018 13:42
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num.swift
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if string.count == 0 { return true } //Backspace
if string.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted) != nil { return false } // Non-numerics
return true
}
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