限制輸入最大金額 6 位
保留小數(shù)點后 2 位
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
guard string == "." || string == "0" else {
let newString = (textField.text! as NSString).replacingCharacters(in: range, with: string)
let expression = "^[0-9]{0,6}?$*((\\.|,)[0-9]{0,2})?$"
let regex = try! NSRegularExpression(pattern: expression, options: NSRegularExpression.Options.allowCommentsAndWhitespace)
let numberOfMatches = regex.numberOfMatches(in: newString, options:.reportProgress, range: NSMakeRange(0, (newString as NSString).length))
return numberOfMatches != 0
}
guard let text = textField.text else { return true }
if text.range(of: ".") != nil && string == "." {
return false
}
if text.range(of: ".") != nil{
let list = textField.text!.components(separatedBy: ".")
let last = list.last!
return (last as NSString).length < 2
}
return true
}
保留兩位小數(shù)字符串處理
String.init(format:"%.2f", amountValue)
字符串轉(zhuǎn) CGFloat
func StringToFloat(str:String)->(CGFloat) {
let string = str
var cgFloat: CGFloat = 0
if let doubleValue = Double(string) {
cgFloat = CGFloat(doubleValue)
}
return cgFloat
}
