CustomTextField is used to mask the text entered in textfield(e.g: Credit card number -> "**** **** **** 1111").
To run the example project, clone the repo, and run pod install from the Example directory first.
CustomTextField is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "CustomTextField"Add CustomTextField.swift file into your project.
import CustomTextField
- Assgin Textfield's delegate to viewController
- Declare a String variable to hold Textfield value for later purpose.
var cardNumberBuffer : String = ""- Implement 'shouldChangeCharactersIn' method of UITextFieldDelegate.
- return false for the textfield you want to mask the text.
- Call textField.shouldChangeValue(cardNumberBuffer: String)
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if (string.characters.count > 0)
{
if (self.isMaxLength(textField)) {
return false
}
self.cardNumberBuffer = String(format: "%@%@", self.cardNumberBuffer, string)
}
else
{
if (self.cardNumberBuffer.characters.count > 1)
{
let length = self.cardNumberBuffer.characters.count-1
self.cardNumberBuffer = self.cardNumberBuffer[self.cardNumberBuffer.index(self.cardNumberBuffer.startIndex, offsetBy: 0)...self.cardNumberBuffer.index(self.cardNumberBuffer.startIndex, offsetBy: length-1)]
}
else
{
self.cardNumberBuffer = ""
}
}
textField.shouldChangeValue(cardNumberBuffer: self.cardNumberBuffer)
return false
}
func isMaxLength(_ textField:UITextField) -> Bool {
var result = false
if ((textField.text?.characters.count)! > 19)
{
result = true
}
return result
}rajanshahsa, rajan.shah@solutionanalysts.com
CustomTextField is available under the MIT license. See the LICENSE file for more info.