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)
Related
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.
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.
I want to keep the place holder text shown while it is focused (that is, while it is the first responder). It should stay that way only until something is typed and the field no longer blank.
Address Book app's Search bar behaves like this, as do the new contact entry fields.
Is there any way to do that?
I don't think this comes "built in" for you to activate it, but you can build it rather easily on your own: Create a UILabel you want to display and when the focus is set onto the TextField place the UILabel at the right spot (slightly after the cursor).
As soon as the user enters a character you hide the UILabel. You can see when the user starts the edit and starts to type by adding your class as delegate to the UISearchBar (see callbacks "searchBar:textDidChange:" and "searchBarTextDidBeginEditing:"): http://bit.ly/eQlvRz
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
I'm sorry if I didn't explain my problem well enough in the title.
In my application, I'm using a small subview to create a very basic calculator on the top side of the screen (I just have an UITextField to show the operations and two buttons). Instead of using a custom keyboard for it, I want to use the standard iPhone number pad.
My problem is that after doing an operation (e.g. adding two numbers) and showing the result, I cannot figure out how to clear the screen when the user enters a new number.
So, for example:
User enters "6" -> Number 6 is shown in UITextField
User selects "+" -> UITextField is cleared to make room for the next number
User enters "10" -> Number 10 is shown in UITextField
User selects "+" -> 16 is shown as the result of the previous operation, and should stay there until another number is pressed (he wants to continue adding more numbers)
User enters "5"
At this point, if I was using a custom keyboard, I could clear the UITextField as soon as the button "5" is pressed by the user, but I cannot figure out how to do so when using the standard number pad. So, the result I get at the moment is "165".
Is there a way to detect when a key is pressed in the standard number pad so that I can clear the UITextField before the new number appears? I thought there may be a NSNotification for that, but I couldn't find it.
I'm aware that I could solve my problem if I created a custom keyboard or if I used two separated UITextFields (one for the operations and another one for the total), but I would like to use the standard number pad if it's possible.
Thanks very much!
Set a delegate for the UITextField and use shouldChangeCharactersInRange:replacementString:
This will trap every individual keystroke enabling you to do what you want. See
http://developer.apple.com/iphone/library/documentation/uikit/reference/UITextFieldDelegate_Protocol/UITextFieldDelegate/UITextFieldDelegate.html#//apple_ref/occ/intfm/UITextFieldDelegate/textField:shouldChangeCharactersInRange:replacementString:
If I've understood you correctly that should cover it.