UitextField shifts control to next textField upon using keyboard input - ios

I am new to iPhone programming. I have two textfields in iPhone with numberPad Keyboard type and i am trying to implement a simple logic that on typing a single digit using numberPadKeyBoard, the control should shift to next textField i.e. second textfield should become FirstResponder. I don't know how to implement this. Please guys any help would be appreciated.

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if(textField == urFirstTextField) {
[urFirstTextField resignFirstResponder];
[urSecondtextField becomeFirstResponder];
}
}
UPDATE
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
if(textField != urFirstTextField)
{
[textField resignFirstResponder];
[urFirstTextField becomeFirstResponder];
return NO;
}
return YES;
}

Suppose you have 2 text field textField1 and textField2 then implement the delgate methods of the UITextFieldDelegate as
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
if(textField == textField1)
{
[textField1 resignFirstResponder];
[textField2 becomeFirstResponder];
}
return YES;
}

go through the delegate method of UITextField named "textField:shouldChangeText:inRange:" ..... check the length of your textField and make second textField as first responder before returning YES;
Or you can play with a lot of other delegate methods defined

Related

When I tap the TextField and don't show the keyboard. How can i use?

I am new iOS Application Developer. and I want to try when i tap the textfield and don't show the keyboard but textfield to tap then show the cursor point will be show. how can i try this?
i want try this code but it did't work.
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
You can call the Function.
and implement the .h file.
#interface ViewController : UIViewController<UITextFieldDelegate>
implement the .m file.
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
if (!textField.inputView) {
//it hides the keyboard, but cursor will show
textField.inputView = [[UIView alloc] initWithFrame:CGRectZero];
}
return YES;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
return NO;
}
If you don't allow people to tap in TextField, using textfield's delegate method:
(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
return false;
}

Don't show the keyboard when I tapped in TextField

I am new to Objective C and iOS development in general. I am trying to create an app that would make an UITextField to tapped. I want the keyboard not to show when I tap on the textfield. then I want many times to tap textfield and don't show the keyboard.
I Want to try this code but it didn't work.
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
you can called this functions in delegate methods
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
if (!textField.inputView) {
//it hides the keyboard, but cursor will show
textField.inputView = [[UIView alloc] initWithFrame:CGRectZero];
}
return YES;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
return NO;
}
You can implement delegate method like,
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
//Or just return No
}
Make sure that you have confirm protocol UITextFieldDelegate and you have set delegate property of your textField to self.

how to erase or clear UITextField

how to clear text field in ios,
How can I make a textfield box remove all content on the users first keypress?
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if([tfieldDOB.text length] == 4)
{
tfieldDOB.text=[NSString stringWithFormat:#"%#/",tfieldDOB.text];
}
else if([tfieldDOB.text length]==7)
{
tfieldDOB.text=[NSString stringWithFormat:#"%#/",tfieldDOB.text];
}
return YES;
}
change the textfield attribute clear button mode in appears while editing
or other choice just use the single line, where you need to add
yourtextfieldname.text=#""; //it is used for clear the textfield values
Swift
yourtextfieldname.text=""
or another way
clearField =#"YES";
if([clearField isequaltostring:#"YES"]) //check this line in
{
tfieldDOB.text = #"";
clearField =#"NO";
}
Implement the text field's delegate method textFieldShouldBeginEditing: and set the text as empty string when the text field is just about to being editing.
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
[textField setText:#""];
return YES;
}
Or you can set the property clearsOnBeginEditing of the textfield as
[textField setClearsOnBeginEditing:YES];
and it will clear the text when editing begins

Adding text to UITextField you can't delete

What I would like to do is to add some text at the beginning of UITextField that cannot be deleted. I add this text when the user taps on UITextField like this:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
if (textField.text.length == 0) {
textField.text = #"myText";
}
return YES;
}
How do I prevent the user from deleting this text in a normal way? (without adding a separate UILabel on top of the TextField, for example).
Thanks in advance!
You can implement this code in shouldChangeCharactersInRange delegate method.
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if (textField.text.length == 1 && [string isEqualToString:#""]) {//When detect backspace when have one character.
textField.text = #"myText";
}
return YES;
}
Checkout shouldChangeCharactersInRange in the UITextFieldProtocolReference
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
the text field calls this method whenever the user types a new
character in the text field or deletes an existing character.
So, you have control on whether text actually gets changed so you can insert your custom logic in that delegate callback enforcing whatever rules about what can change.
Use this
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([[textField text] length]==LENGTH_OF_TEXT && [string isEqualToString:#""])
{
return NO;
}
else
return YES;
}
Hope it helps you.

Change UIKeyboardType based on text input

I'm trying to change the UIKeyboardType to the alphabet keyboard when the user types a space, mirroring the effect of typing an apostrophe. However, my code won't change the keyboard appearance until the user dismisses the keyboard and then brings it back again.
Edit: To clarify, the keyboard type starts as UIKeyboardTypeNumbersAndPunctuation and I want to change to ASCIICapable, because the typical user input is in the form of "# cups flour". I realized that the ASCIICapable keyboard has this functionality built-in, so presenting the ASCII capable keyboard but showing the numbers/punctuation first would work.
Here's my code:
- (BOOL) textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([string isEqualToString:#" "]) {
textField.keyboardType = UIKeyboardTypeASCIICapable;
}
return YES;
}
dismiss the keyboard and then become the first responder again. In my code, I created a IBOutlet for the textfield *tf. It worked.
- (BOOL) textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([string isEqualToString:#" "]) {
self.tf.keyboardType = UIKeyboardTypeNumberPad;
[textField resignFirstResponder];
[self.tf becomeFirstResponder];
}
return YES;
}

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