New key on the keyboard - iphone

I work on a iPhone project with iOS 4 and Xcode 4.
In a view I have several UITextField, that the user fills with numbers. So only the Numbers keyword is used.
When the user fills in a text field and click Go, some processing is started (modification of the text of several textFields).
Now I would like to consider also a second option: user open the keyboard but then decides to close it without any process (i.e. cancel the process).
So I need a keyboard with a cancel key as shown on this the picture:
Finally my question: how can I create a keyboard with a cancel key as above?
Edit: picture of my view

The keyboard cannot be modified. You should add a cancel button, or some other way of triggering a cancel, in your UI.

Related

Softkeyboard's "check" button vs using .unfocus()

In this video I first click on a field within the first tab, then click the soft keyboard's "check" button. This hides the soft keyboard and takes the focus away from that field. I then navigate across tabs and back to the first. No field has the focus at this point. This is the expected behavior.
In the second iteration, I click in the notes field. Without closing the soft keyboard, I then click the submit button. That button calls FocusScope.of(context).unfocus(); which hides the soft keyboard and takes the focus away from the notes field (the teal border disappears). However, at this point I click on the next tab and the soft keyboard reappears. And when I click back the first tab the notes field once again has the focus.
Why does this happen?
What underlying code does the "check button" on the keyboard call and can I wire this up to the button rater than calling the .unfocus() method to get the expected result?
Edit: Still no explanation. The undesirable persistent keyboard does not occur on iOS.

Trigger keyboard show-up Flutter

I know most of the people have problems with keyboard and want it to go away, but I'm interested in it showing up. Basically, I want to trigger the keyboard show-up when I tap an element and then get the text I typed via RawKeyboard. Is there a way I can trigger the keyboard to show in Flutter? So far I understood you can do that only when you have a TextField.
Many thanks.

How can I represent a keyboard touch event programmatically in IOS?

I am working on an app that uses voice commands to maneuver through text fields. What I need to do is translate the voice command into a touch event on the keyboard. Specifically I need to access the tab key and the return key. The user will not be using the keyboard in this app. I am having a difficult time finding a way to get this done. I know how to convert the voice commands into something that I can use, but I still need to apply that to the keyboard commands. I have researched this extensively and I get what I think are bits and pieces of what I really need, but nothing is connecting the dots for me.
You don't need the keyboard to navigate text fields. You just need to modify the first responder. There unfortunately isn't an easy way to get the current first responder, but you can search for it.
Once you have the first responder, you can move to the next field like this:
[[field nextResponder] becomeFirstResponder];
If you are trying to do this in a very general way, you should first call canBecomeFirstResponder and handle situations where there there are no available first responders and other corner cases, but this generally isn't needed for very simple interfaces.
If you want to manage "enter" in order to end editing and dismiss the keyboard, you can call endEditing: on the superview.
You can modify text without the keyboard by replacing the text property.

Custom Pin Password Boxes on iOS

I want to create a 4 character custom password entry like the iPhone lock screen page. It's going to have a custom designed keyboard pinpad, but thats not the question. I have 4 boxes for the entry of the pin, and each box is separated and has its own custom design. I currently have a clear UITextView on top of each box. However, I'm not really sure how to link all these together so that when I enter a number in the first box, it automatically advances to the next box so I can type the next number. After the last number has been entered, it should automatically check to see if the password is correct and if so do some action. What is the best way to do this?
When implementing UITextFieldDelegate you should check on textField:shouldChangeCharactersInRange:replacementString:
and you can move keyboard focus to next UITextField via BecomeFirstResponder documentation
So on last UITextField you will hide keyboard and disable all UITextboxes automatically, but If I were you, I would prefer to provide button to start checking pin (to let user correct pin if mistyped)

custom keyboard - how to dispatch event which signals the UITextField to update the text accordingaly

I am trying to create a custom keypad through a collection of buttons, which function like a regular keypad provided in iphone.
Now series of action that should occur
-text field is selected
-user presses the button
-text field is designated as first responder
-something like key event is launched so that text field is updated according to the character associated with the button.
If above supposition of flow is correct, please guide me how to get around the last step. I am newbie to iphone, so please let me know if am missing any of the basic.
Found an other way which did the needed by simulating the behaviour of keyEvent( which i doubt if exist in iphone sdk).
Basic outline of the procedure is like
-push the content to pasteboard
-call the paste function on UITextField
so when button is pressed, content corresponding to the button is copied to pasteboard and then paste function is called on the UITextField, so that the content get inserted into it.
Detailed description of steps can be found here:
http://dev.ragfield.com/2009/09/insert-text-at-current-cursor-location.html