NSPopUpButton箭头颜色

Question

有没有办法自定义NSPopUpButton箭头的颜色？我环顾了四周，但还没有找到答案

Answer 1

我真的不认为有一个“简单”的方法来做到这一点。如果你看一下API描述，它甚至声明它不响应setImage例程。我已经做了相当多的工作，按钮对象的子类化，等等。我认为这是你必须去做的地方，以完成你所要求的。

Answer 2

像许多这样的控件一样，我是通过继承NSPopupButton(单元格)，然后在drawRect中绘制自己的图形来实现的……我有一点作弊，用一个图像来做实际的三角形，而不是试图通过基元来做。

- (void)drawRect:(NSRect)dirtyRect 
{
  //...Insert button draw code here...
  //Admittedly the above statement includes more work than we probably want to do.
  //Assumes triangleIcon is a cached NSImage...I also make assumptions about location

  CGFloat iconSize = 6.0;
  CGFloat iconYLoc = (dirtyRect.size.height - iconSize) / 2.0;
  CGFloat iconXLoc = (dirtyRect.size.width - (iconSize + 8));

  CGRect triRect = {iconXLoc, iconYLoc, iconSize, iconSize};
  [triangleIcon drawInRect:triRect];
}

Answer 3

我这样做了，它对我很有效。

(void)drawImageWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSPopUpButton *temp = (NSPopUpButton*)controlView;

    NSString *strtile = temp.title;

    AppDelegate *appdel = (AppDelegate*)[NSApplication sharedApplication].delegate;
    NSFont *font = [NSFont systemFontOfSize:13.5];
   NSSize size = NSMakeSize(40, 10);// string size

    CGRect rect = controlView.frame;
    rect = CGRectMake((size.width + temp.frame.size.width)/2, rect.origin.y, 8, 17);

    [self drawImage:[NSImage imageNamed:@"icon_downArrow_white.png"] withFrame:rect inView:self.
}