I've setup an NSTextField
with text color as white, and the background color as (black despite not rendering the background color, so its transparent). All in Interface Builder.
The problem I am having is the cursor is black, and hardly visible. Does the cursor not represent the text color? Any id开发者_如何学Ceas how I can fix this?
Otherwise, the NSTextField
looks like it cannot be edited.
Since in practice the NSText* returned by -currentEditor for an NSTextField is always an NSTextView*, I added the following code to my custom NSTextField subclass:
-(BOOL) becomeFirstResponder
{
BOOL success = [super becomeFirstResponder];
if( success )
{
// Strictly spoken, NSText (which currentEditor returns) doesn't
// implement setInsertionPointColor:, but it's an NSTextView in practice.
// But let's be paranoid, better show an invisible black-on-black cursor
// than crash.
NSTextView* textField = (NSTextView*) [self currentEditor];
if( [textField respondsToSelector: @selector(setInsertionPointColor:)] )
[textField setInsertionPointColor: [NSColor whiteColor]];
}
return success;
}
So if you're already replacing this class because you're doing custom background drawing, this might be a more encapsulated solution. Maybe there's even a way to move this up into NSCell, which would be cleaner since NSCell is the one doing the drawing and knowing the colors anyway.
TextField Insertion Point Color
NSTextField *textField = self.textField;
NSColor *insertionPointColor = [NSColor blueColor];
NSTextView *fieldEditor = (NSTextView*)[textField.window fieldEditor:YES
forObject:textField];
fieldEditor.insertionPointColor = insertionPointColor;
Your best bet is probably to use NSTextView and - (void)setInsertionPointColor:(NSColor *)color
.
Assuming that you are wanting to set the color of the insertion caret and not the mouse cursor then the suggestion of using setInsertionPointColor:
should work.
However, you do not necessarily need to change from using NSTextField
to NSTextView
. The field editor for window that the NSTextField
is in is an NSTextView
. So when your NSTextField
becomes the key view you could grab the field editor and call setInsertionPointColor:
on that. You may need to reset the color when your field stops being the key view.
You can get the field editor by using NSWindow
's fieldEditor:forObject:
or NSCell
's fieldEditorForView:
.
If you have a subclass of NSTextField you can have it use a custom subclass of NSTextFieldCell and override -(NSText*)setUpFieldEditorAttributes:(NSText*)textObj
. In that method you can set the insertion point color once and it will stay while the field editor is active for this text field. Though when the field editor is moved to another edit field the insertion point color will remain unless you reset it.
I've called insertionPointColor
in viewDidLoad
and app crashes.
I fixed this by calling insertionPointColor
on viewDidAppear
.
For Swift developers:
Set insertionPointColor method into extension:
extension NSTextField {
public func customizeCursorColor(_ cursorColor: NSColor) {
let fieldEditor = self.window?.fieldEditor(true, for: self) as! NSTextView
fieldEditor.insertionPointColor = cursorColor
}
}
and call
override func viewDidAppear() {
super.viewDidAppear()
textField.customizeCursorColor(NSColor.red)
}
Swift 4 Solution
override func viewDidAppear() {
super.viewDidAppear()
guard let window = _textField.window, let fieldEditor = window.fieldEditor(true, for: _textField) as? NSTextView else { return }
fieldEditor.insertionPointColor = .white
}
Inspired by the great answer of Jon Steinmetz I created the following example.
I added a NSSecureTextField
to the application view and connected it to the IBOutlet
of the member variable I placed into AppDelegate
.
@implementation AppDelegate
@synthesize password = m_password;
- (void)awakeFromNib {
assert(m_password);
self.password.backgroundColor = [NSColor blackColor];
}
Then I created a custom NSSecureTextField
class. I noticed that is in some cases not enough to set the colors in awakeFromNib
but I cannot give a reason for this.
@implementation CustomSecureTextField
- (void)customize {
// Customize the text and caret color.
NSColor* foregroundColor = [NSColor whiteColor];
self.textColor = foregroundColor;
[[self.cell fieldEditorForView:self] setInsertionPointColor:foregroundColor];
}
- (void)awakeFromNib {
[self customize];
}
- (void)textDidBeginEditing:(NSNotification*)notification {
// Called when the user inputs a character.
[self customize];
}
- (void)textDidEndEditing:(NSNotification*)notification {
// Called when the user clicks into the field for the first time.
[self customize];
}
- (void)textDidChange:(NSNotification*)notification {
// Just in case ... for the paranoid programmer!
[self customize];
}
@end
Note: Though, I do not understand why the background color cannot be set when I do this in the derived class like with the textColor
. That would allow to get rid of the IBOutlet
and the member variable.
easiest way is
override func viewDidAppear() {
if let fieldEditor = self.view.window?.fieldEditor(true, for: self) as? NSTextView{
fieldEditor.insertionPointColor = NSColor.black
}
}
I use this code in swift
if let editor = textField.currentEditor() as? NSTextView{
editor.insertionPointColor = myColor ?? .black
}
If you use Objective-C runtime selector capture combined with uliwitness's solution, you can achieve it without subclassing NSTextField, here I use RxCocoa's methodInvoked
as an example:
import Cocoa
import RxCocoa
extension NSTextField {
func withCursorColor(_ color: NSColor) {
rx.methodInvoked(#selector(becomeFirstResponder))
.subscribe(onNext: { [unowned self] _ in
guard let editor = self.currentEditor() as? NSTextView else { return }
editor.insertionPointColor = color
})
.disposed(by: rx.disposeBag)
}
}
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