when insert same character with the patternSymbol, will happen crash!

[ericchuhong]

eg: current textfield exist "8123456#"，then, if your insert other number，will crash。Console show

Fatal error: String index is out of bounds: file Swift/StringCharacterView.swift, line 60

[luximetr]

eg: current textfield exist "8123456#"，then, if your insert other number，will crash。Console show

Fatal error: String index is out of bounds: file Swift/StringCharacterView.swift, line 60

Will investigate it, can you please share how do you create a formatter, that crashes.

[ericchuhong]

Here is my code to create formatter.

···
/// SubClass inheritance from TextFieldInputController
class MeetingNumberInputDelegator: TextFieldInputController {
    override func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        /// filter space in string
        let inputStr = string.replacingOccurrences(of: " ", with: "", options: .literal, range: nil)
        return super.textField(textField, shouldChangeCharactersIn: range, replacementString: inputStr)
    }
}
···
/// Define in view
var meetingNumberInputController = MeetingNumberInputDelegator()
var meetingNumberFormatter : DefaultTextInputFormatter = {
      let formatter = DefaultTextInputFormatter(textPattern: "### #### ########")
      return formatter
}()
···
/// Use
inputNoField.delegate = meetingNumberInputController
meetingNumberInputController.formatter = meetingNumberFormatter

[luximetr]

eg: current textfield exist "8123456#"，then, if your insert other number，will crash。Console show

Fatal error: String index is out of bounds: file Swift/StringCharacterView.swift, line 60

I can suggest you a quick fix, during init of formatter you can pass pattern symbol parameter and set it to some other symbol. Later I will try to fix this crash.

[luximetr]

Fixed at 2.5.2.