我在我的应用程序中的自定义 View 中创建了一个 NSPopUpButton
,该 View 具有黑色填充。我现在想让 NSPopUpButton
具有白色文本颜色,但我似乎无法做到这一点。我该怎么做呢?
谢谢
最佳答案
这很容易。您只需要覆盖 -[NSPopUpButtonCell drawTitle:withFrame:inView],然后可以更改有关标题的所有内容,例如颜色、字体、框架等。下面是一个示例。希望能帮到你。
目标-C:
@interface MyPopUpButtonCell : NSPopUpButtonCell
@property (nonatomic, readwrite, copy) NSColor *textColor;
@end
@implementation MyPopUpButtonCell
- (NSRect)drawTitle:(NSAttributedString*)title withFrame:(NSRect)frame inView:(NSView*)controlView {
NSRect newFrame = NSMakeRect(NSMinX(frame), NSMinY(frame)+2, NSWidth(frame), NSHeight(frame));
if (self.textColor) {
NSMutableAttributedString *newTitle = [[NSMutableAttributedString alloc] initWithAttributedString:title];
NSRange range = NSMakeRange(0, newTitle.length);
[newTitle addAttribute:NSForegroundColorAttributeName value:self.textColor range:range];
return [super drawTitle:newTitle withFrame:newFrame inView:controlView];
}else {
return [super drawTitle:title withFrame:newFrame inView:controlView];
}
}
@end
swift :
class MyPopUpButtonCell: NSPopUpButtonCell {
var textColor: NSColor? = nil
override
func drawTitle(_ title: NSAttributedString, withFrame frame: NSRect, in controlView: NSView) -> NSRect {
if self.textColor != nil {
let attrTitle = NSMutableAttributedString.init(attributedString: title)
let range = NSMakeRange(0, attrTitle.length)
attrTitle.addAttributes([NSAttributedString.Key.foregroundColor : self.textColor!], range: range)
return super.drawTitle(attrTitle, withFrame: frame, in: controlView)
}else {
return super.drawTitle(title, withFrame: frame, in: controlView)
}
}
}
关于macos - NSPopUpButton 白色文本,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30548730/