UITextfield Change keyboard - ios

Question

I am new to iOS,
I want to change keyboard after certain characters left in UITextField,
for e.g.: I have String of #"AEBPQ1234M"
for first 5 letters I want alphabet keyboard and then for next 4 letters I need number pad and on last letter I need again alphabet.
here is the code I have tried but it's not working when I hit backspace in the keyboard.
-(void)textFieldDidChange :(UITextField *)theTextField{
if (theTextField.text.length < 5 || theTextField.text.length >= 9) {
[theTextField setKeyboardType:UIKeyboardTypeEmailAddress];
}
if (theTextField.text.length >= 5 && theTextField.text.length < 9 ) {
[theTextField setKeyboardType: UIKeyboardTypeNumberPad];
}
[theTextField reloadInputViews];
}
Where I am making mistake?

Answer 1

Try this-
-(void)textFieldDidChange :(UITextField *)theTextField{
if (panNumber.length <= 5 || panNumber.length > 9) {
[theTextField setKeyboardType:UIKeyboardTypeEmailAddress];
}
else {
[theTextField setKeyboardType: UIKeyboardTypeNumberPad];
}
[theTextField reloadInputViews];
}

Answer 2

use this
where selector textEditingChanged: should listen for UIControlEventEditingChanged event
//add following in viewDidLoad
[self.textField addTarget:self action:#selector(textEditingChanged:) forControlEvents:UIControlEventEditingChanged];
-(void)textEditingChanged:(UITextField*) sender{
if (sender.text.length > 5 && sender.text.length < 9 ) {
[self.textField setKeyboardType: UIKeyboardTypeNumberPad];
}
if (sender.text.length < 5 || sender.text.length == 10) {
[self.textField setKeyboardType:UIKeyboardTypeEmailAddress];
}
[self.textField reloadInputViews];
}
This will be a bad experience for a user who types very fast in phone keyboard.

Answer 3

Try below code.
At first declare UITextFieldDelegate in your .h file. Also set it's delegate with self.
You can set self delegate with two types :-
1. Storyboard
2. Code
When set with code write textField.delegate = self; in viewDidLoad method.
Now use below code in .m file
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (textField.text.length < 4 || textField.text.length > 7) {
[textField setKeyboardType: UIKeyboardTypeEmailAddress];
} else {
[textField setKeyboardType: UIKeyboardTypeNumberPad];
}
[textField reloadInputViews];
return YES;
}

Answer 4

I would recommend using multiple textFields each with their own keyboard type.
Then on your end you can append the inputted strings together to do whatever it is you need to do. This is much better user experience and also much simpler to do.

Answer 5

Please check my answer.It works perfectly.I tried it then only I post the answer here.
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
if(string.length == 0 && range.location == 9)
range.location = range.location - 2;
if(string.length == 0 && range.location == 8)
range.location = range.location - 1;
if(string.length == 0 && range.location > 3)
range.location = range.location - 2;
if(range.location <= 3){
textField.keyboardType = UIKeyboardTypeAlphabet;
[textField reloadInputViews];
return YES;
}
else if(range.location > 3 && range.location <= 7){
textField.keyboardType = UIKeyboardTypeNumberPad;
[textField reloadInputViews];
return YES;
}
else if(range.location > 7){
textField.keyboardType = UIKeyboardTypeAlphabet;
[textField reloadInputViews];
return YES;
}
else{
return NO;
}
return YES;
}