I want to make an app that allows the user to enter a value in a text field and from that, it should change the value of a label. I'm new in programming so I don't really know how to code it. In the .m file how should I connect the text field's value to the value of the label?
Thanks in advance
Bind your textField to this method
– textFieldShouldEndEditing:(UITextField*) txtField
{
[labelField setText: [textField text]]
return YES:
}
Related
I am able to type a value into the text field and add the value to an array I created. Therefore I know the delegate is set correctly.
When I try to set the text field with the value from the array it will not set and the field is empty.
I am setting the text field like this:
setStringValue:inputDecsription = [descriptionArrayobjectAtIndex:selected];
NSLog(#"Description %#", inputDecsription);
Description Florida Power
The text field remains empty. What am I doing wrong?
I have a view that contains an NSTableView and an NSTextField. The table view has focus. I would like to use the text field as a filter for the table view. Is there any way that I can send a key press event, which is captured by the table view, to the NSTextField?
Here is the keyDown func as I have it, I would like to send theEvent to the text field in the default handler of the switch statement.
override func keyDown(theEvent: NSEvent) {
let s = theEvent.charactersIgnoringModifiers!
let s1 = s.unicodeScalars
let s2 = s1[s1.startIndex].value
let s3 = Int(s2)
switch s3 {
case NSUpArrowFunctionKey:
self.previous()
return
case NSDownArrowFunctionKey:
self.next()
return
default:
// this appends the text to the textField, Is there a way to send theEvent to the textField?
textField.stringValue = textField.stringValue + s;
// textField.keyDown(theEvent) // this does not work
break
}
}
I would like to not have to force the user to change focus to the text field in order to filter the table view results.
As far as I understand it the -keyDown: is sent to the firstResponder which in this case is the table view.
I don't like this idea and I would implement this is a different way, but you could try inserting the text field into the responder chain and a position above table view. You would have to subclass the text field and implement mouseDown to capture the events and you would also have to change you table views mouse down implementation so it didn't capture the event for the text field. This is overly complicated.
Why not simply set the target/action of the text field and deal with user input outside of the event loop?
I have a view with a view-based NSTableView (which itself has a cell view with a single text field) and some buttons and textfields outside the tableview. One of the buttons adds an object into the datasource for the tableview, and after inserting the row into the tableview, immediately makes it editable.
If the user enters the text and pressed the return key, I receive the - (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor delegate method fine, and I can run my validation and save the value. But the delegate doesn't get called if the user selects any of the other buttons or textfields outside the tableview.
What's the best way to detect this loss-of-focus on the textfield inside the NSTableCellView, so I can run some of my validation code on the tableview entry?
If I understand you correctly you want a control:textShouldEndEditing: notification to fire in the following situation:
You add a new object to the array controller.
The row in the table representing the object is automatically selected.
YOU programmatically select the text field in the relevant row for editing.
The user immediately (i.e. without making any edits in the text field) gives focus to a control elsewhere in the UI
One approach I've used in the past to get this working is to make an insignificant programmatic change to the field editor associated with the text field, just before the text field becomes available to the user for editing. The snippet below shows how to do this - this is step 2/step 3 in the above scenario:
func tableViewSelectionDidChange(notification: NSNotification) {
if justAddedToArrayController == true {
// This change of selection is occurring because the user has added a new
// object to the array controller, and it has been automatically selected
// in the table view. Now need to give focus to the text field in the
// newly selected row...
// Access the cell
var cell = tableView.viewAtColumn(0,
row: arrayController.selectionIndex,
makeIfNecessary: true) as NSTableCellView
// Make the text field associated with the cell the first responder (i.e.
// give it focus)
window.makeFirstResponder(cell.textField!)
// Access, then 'nudge' the field editor - make it think it's already
// been edited so that it'll fire 'should' messages even if the user
// doesn't add anything to the text field
var fe = tableView.window?.fieldEditor(true, forObject: cell.textField!)
fe!.insertText(cell.textField!.stringValue)
}
}
I am trying to make a small calculator app.
When a UIButton is pressed, the Button title is added to a UITextField.
kind of:
myuitextfield.text = [myuitextfield.text stringByAppendingString:[button currentTitle];
When I reach the end of my textfield, the text gets truncated. How can I disable this, so the textfield starts scrolling automatically and allows adding more characters?
I tried every possible option in Interface Builder, without any luck.
Isn't the UITextField supposed to scroll automatically? I can see this behavior when a native keyboard is used and text is entered.
I have chosen UITextField, as I need only 1 Line.
To illustrate the Problem:
When I enter text using my custom UIButtons text gets truncated
When I tap the UITextField and enter text using the keyboard I can enter unlimited text and the text is not truncated.
If you are facing this issue on iOS7, I've managed to fix it after been inspired by this post. In my case I had a field for entering an email address and after reaching the edge, the user could carry on typing but the text would be invisible (off-field).
First, add a callback to your UITextField so that you can track a text change to the field:
[self.field addTarget:self action:#selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
Then evaluate the size in pixels of the entered string as it is typed and change the text alignment from left to right when reaching the edge of the field area:
- (void)textFieldDidChange:(NSNotification *)aNotif{
float maxNumPixelsOnScreen = 235; // Change this value to fit your case
CGSize maximumSize = CGSizeMake(maxNumPixelsOnScreen + 10, 1);
NSString *aString = self.field.text;
CGSize stringSize = [aString sizeWithFont:fieldFont
constrainedToSize:maximumSize
lineBreakMode:NSLineBreakByWordWrapping];
self.field.textAlignment = NSTextAlignmentLeft;
if (stringSize.width >= maxNumPixelsOnScreen)
self.field.textAlignment = NSTextAlignmentRight;
}
Note:
self.field is the offending UITextField
maximumSize: I'm adding 10 the the width to be slightly over the limit defined
fieldFont is the UIFont used to render the text field
Hope it helps!
you have to add UITextview and limit the number of lines to 2.Textfield doesnt work with two lines.Textview is same as textfields except the delegates and some properties differ.
I have a simple question.
In an iApp in Japanese I have one UITextField object which do not need Japanese input.
Is it possible to disable Japanese-mode input only for this one object.
(That would make the input much easier for the user)
I have already tried:
myTextField.autocorrectionType=UITextAutocorrectionTypeNo;
and it does not work.
Thanks for any tip.
UITextField has keyboardType property.
When the keyboardType is set to UIKeyboardTypeDefault, Japanese keyboard could be shown as a default keyboard.
typedef enum {
UIKeyboardTypeDefault,
UIKeyboardTypeASCIICapable,
UIKeyboardTypeNumbersAndPunctuation,
UIKeyboardTypeURL,
UIKeyboardTypeNumberPad,
UIKeyboardTypePhonePad,
UIKeyboardTypeNamePhonePad,
UIKeyboardTypeEmailAddress,
UIKeyboardTypeDecimalPad,
UIKeyboardTypeTwitter,
UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable
} UIKeyboardType;
To set keyboadType Programmatically, you can use setKeyboardType as folows:
[myTextField setKeyboardType:UIKeyboardTypeASCIICapable];
The document is here:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UITextInputTraits_Protocol/Reference/UITextInputTraits.html