Working on an experiment on the iPad. Tried some variations on how to do this, but I can't seem to get it to work correctly...
I tap a UIButton on my MainViewController and a TextEntryModule is added to the view. TextEntryModule is its own class (for multiple instantiation) and it contains a UITextView called TextEntry (this all works at the moment).
I tap on the TextEntry UITextView and it brings up the keyboard and another view (located in MainViewController) with a UITextView called TextPreview. (this also works at the moment).
The part I'm having trouble with is synching the two UITextViews. The idea being that when I type into TextEntry, the text in TextPreview will also be updated.
Outlets are linked properly for the text fields, but I think I'm missing something "obvious":
TextEntryModule *tm = (AnnotationModule *)currentModule;
TextPreview.text = tm.TextEntry.text
Thanks in advance!
UITextView: delegate.
- (void)textViewDidChange:(UITextView *)textView
Then assign it the value of the other textview in this method.
Edit
#interface MainViewController <UITextViewDelegate> {
...
}
...
#end
Then you implement this method in the implementation file of MainViewController
#implementation MainViewController
//More code
- (void)textViewDidChange:(UITextView *)textView {
TextEntryModule *tm = (AnnotationModule *)currentModule;
TextPreview.text = tm.TextEntry.text
}
#end
Then you will have to set the TextEntryModule object's delegate to self since the controller now conform to the protocol and can "act" upon this notification.
You need to become a UITextFieldDelegate and monitor when text changes in the one field and then update the other field. Take a look at the documentation on it.
Related
Let's say I have a simple NSDocument subclass:
#interface Document : NSDocument
#property NSString *someText;
#end
I want to map someText to some field in my view - so I add a new field to my view controller:
#interface ViewController : NSViewController
#property Document* document;
#end
...and make sure to store my document:
- (void)setRepresentedObject:(id)representedObject {
[super setRepresentedObject:representedObject];
self.document = ((Document*)representedObject);
}
Oh yeah, and I make sure that the document property is dynamic, which a bit of googling brought up as important for data binding:
#implementation Document
#dynamic someText;
#end
Then head on over to my NSTextField and try to bind the value:
As you can see, it reports that "Xcode cannot resolve the entered keypath." Furthermore, the "Controller Key" field (which I believe is where I'm supposed to specify document, with self.someText for the keypath?) is entirely greyed out.
What am I doing wrong?
It turns out that #dynamic isn't necessary - what is necessary is that the view controller's representedObject is set quite early.
I modified the default generated makeWindowControllers in the Document class so that it sets representedObject on the just-created WindowController's contentViewController before addWindowController is invoked:
- (void)makeWindowControllers {
NSWindowController *wc = [[NSStoryboard storyboardWithName:#"Main" bundle:nil] instantiateControllerWithIdentifier:#"Document Window Controller"];
wc.contentViewController.representedObject = self;
[self addWindowController:wc];
}
And then, in my storyboard, I simply bound to View Controller with a Model Key Path of representedObject.someText. (Be sure to check off "Continuously Updates Value" if things still don't seem to be changing - otherwise the data model might only be updated on certain events such as focus change.)
I have an NSTextFeild Subclass in which I would like to implement textDidEndEditing: to check after each edit if it is empty or not. The method is being called perfectly, but when I click into another NSTextField (or a subclass), all the text that was in the first textfield is immediately deleted. If I click out into the view, the text stays, but is deleted the next time i click into another textfeild. All I have in the method right now is an NSLog. Does anyone have any ideas as to why this could be happening?
#import "BufferTableCellViewTextField.h"
#implementation BufferTableCellViewTextField
- (void)textDidEndEditing:(NSNotification *)notification{
NSLog(#"END");
}
#end
You need to call -super:
- (void)textDidEndEditing:(NSNotification *)notification;
{
[super textDidEndEditing:notification];
NSLog(#"END");
}
This delegate method wouldn't be causing your problem. I'd look back to your subclass and check to see that you are not using any UITextField delegate methods that are expecting a YES response that you may have inadvertently changed the return responses for. It may be helpful to post you subclass so we can see what is going on in there too...
I have an NSTextField subclass (called "txtField1" and used as Custom Class for a Text Field in my interface builder) and I would like to be able to access an NSComboBox object which present in my interface builder from this class.
This is my code:
txtField1.h:
#import <Cocoa/Cocoa.h>
#interface txtField1 : NSTextField
#end
txtField.m:
#import "txtField1.h"
#implementation txtField1
-(void)mouseDown:(NSEvent *)theEvent
{
HERE I would like to be able to write something like:
[combobox SetHidden:YES];
}
#end
I would like to be able to set access the combobox SetHidden property, in the mouseDown event.
Can you please tell me how to do that? I have tried different solutions found on internet but didn't obtain anything at all!
Any help would be appreciated.
Here are a lot of ways, and answers here, to do :
Update a label through button from different view
Xcode - update ViewController label text from different view
Setting label text in another class
Set label on another view to stored NSDate
EDIT:
-(void)mouseDown:(NSEvent *)theEvent
{
HERE I would like to be able to write something like:
[combobox SetHidden:YES];
/*
use the shared instance of comboBox here and make it hidden.
Also, you can use binding to make it hidden
*/
}
From my point of view txtField1 class is not better place to this code.
You can add NSControlTextEditingDelegate protocol to your NSViewController implementation (that already contains IBOutlets for txtField1 and combobox) and in method – control:textView:doCommandBySelector: implement hiding of your NSComboBox
I saw this answer of how to create a placeholder for UITextView.
I took the following steps:
Add to the .h class the declaration:
#interface AdjustPhotoViewController : UIViewController<UITextViewDelegate>
Added the method:
- (BOOL) textViewShouldBeginEditing:(UITextView *)textView
{
NSLog(#"%d",[textView tag]);
if ([textView tag]==1){
campaignTitle.text = #"";
}else{
campaignDescription.text = #"";
}
return YES;
}
But I don't see that the method is being invoked!
What am I missing?
textView is already delegated via the storyboard to the view
SOLVED:
The problem was that it wasn't delegated. Although I was using storyboard - it was only an outlet, not a delegate.
Remember that if you are using storyboard, you need to delegate also from the text view to the orange button of the view! not only the other way
What am I missing?
Actually setting the delegate.
textView.delegate = self;
Merely conforming to a protocol won't magically make your object into the delegate of an arbitrary object; that's just a formal thing, and anyways, how on Earth would the UITextField know which particular instance of the class it has to assign its delegate?
I am trying to use delegation, which I am new at, to dismiss a modally presented view. I am trying to get it to work along the lines of the apple documentation seen here. So far my code is as follows:
Put both views on storyboard, connect first to second view with modal segue. (the segue to view2 works fine)
create delegate inside second viewcontroller/create method to call when returned:
//inside of view2ViewController.h
#class view2ViewController;
#protocol view2ViewControllerDelegate <NSObject>
-(void)goBack:(OptionsViewController *)controller;
#end
#interface OptionsViewController : UIViewController
#property (nonatomic, weak) id <view2ViewControllerDelegate>delegate;
- (IBAction)return:(id)sender;//connected to button
#end
implement delegate in view1ViewController #interface view1ViewController : UIViewController <view2ViewControllerDelegate>
write code for delegate method goBack in view1Controller.m
-(void)goBack:(view2ViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];}
finish by writing code for return method in view2ViewController.m
- (IBAction)return:(id)sender {
[self.delegate goBack:self];}
I'm not sure where this code is going wrong. The return method is called, but then goBack isn't. I did read the developer documentation, and thought I understood, but I guess not...
PS I change the names of all of my class/variable names on StackOverflow to be more generic, so if there is a slight discrepancy between variable name spellings, it's probably because i typed one wrong.
The best shot I can try -
Make sure you assigned the SplashViewController as the delegate of the view2ViewController.
By code you can do it like that (in the SplashViewController m file):
view2ViewController.delegate = self;
Or you can do to on Story board.
BTW
I a not sure calling your function "return" is a good idea.