NSTextFieldCell 垂直对齐，解决方案似乎挤压了水平对齐

我有一个 NSTextFieldCell，我希望以中间垂直对齐方式显示。感谢这里的一个旧问题和一篇博客文章，我有两个可行的解决方案。

然而，这两种解决方案似乎都削弱了我将单元格设置为右对齐的能力。谁能帮助我使这些解决方案中的任何一个都支持两种形式的对齐？

这是一种解决方案的代码：

@implementation MiddleAlignedTextFieldCell

- (NSRect)titleRectForBounds:(NSRect)theRect {
    NSRect titleFrame = [super titleRectForBounds:theRect];
    NSSize titleSize = [[self attributedStringValue] size];
    titleFrame.origin.y = theRect.origin.y - .5 + (theRect.size.height - titleSize.height) / 2.0;
    return titleFrame;
}

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
    NSRect titleRect = [self titleRectForBounds:cellFrame];
    [[self attributedStringValue] drawInRect:titleRect];
}

@end

替代解决方案是（从这个博客 http://www.red-sweater.com/blog/148/what-a-difference-a-cell-makes):

@implementation RSVerticallyCenteredTextFieldCell

- (NSRect)drawingRectForBounds:(NSRect)theRect
{
    NSRect newRect = [super drawingRectForBounds:theRect];

    if (mIsEditingOrSelecting == NO)
    {
        // Get our ideal size for current text
        NSSize textSize = [self cellSizeForBounds:theRect];

        // Center that in the proposed rect
        float heightDelta = newRect.size.height - textSize.height;  
        if (heightDelta > 0)
        {
            newRect.size.height -= heightDelta;
            newRect.origin.y += (heightDelta / 2);
        }
    }

    return newRect;
}

- (void)selectWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject start:(int)selStart length:(int)selLength
{
    aRect = [self drawingRectForBounds:aRect];
    mIsEditingOrSelecting = YES;    
    [super selectWithFrame:aRect inView:controlView editor:textObj delegate:anObject start:selStart length:selLength];
    mIsEditingOrSelecting = NO;
}

- (void)editWithFrame:(NSRect)aRect inView:(NSView *)controlView editor:(NSText *)textObj delegate:(id)anObject event:(NSEvent *)theEvent
{   
    aRect = [self drawingRectForBounds:aRect];
    mIsEditingOrSelecting = YES;
    [super editWithFrame:aRect inView:controlView editor:textObj delegate:anObject event:theEvent];
    mIsEditingOrSelecting = NO;
}

@end

我发布了这个问题的答案，因为它确实有效，但是，我发现我无法找到另一种方法来检查 IB 的对齐设置，这一事实非常烦人。访问 _cFlags 似乎有点脏，我很想找到一种更干净的方法。

基于之前发布的代码这个博客条目 http://www.red-sweater.com/blog/148/what-a-difference-a-cell-makes.

- (NSRect)drawingRectForBounds:(NSRect)theRect
{
    // Get the parent's idea of where we should draw
    NSRect newRect = [super drawingRectForBounds:theRect];

    if (mIsEditingOrSelecting == NO)
    {
        // Get our ideal size for current text
        NSSize textSize = [self cellSizeForBounds:theRect];

        // Center that in the proposed rect
        float heightDelta = newRect.size.height - textSize.height;  
        if (heightDelta > 0)
        {
            newRect.size.height -= heightDelta;
            newRect.origin.y += (heightDelta / 2);
        }

        // For some reason right aligned text doesn't work.  This section makes it work if set in IB.
        // HACK: using _cFlags isn't a great idea, but I couldn't find another way to find the alignment.
        // TODO: replace _cFlags usage if a better solution is found.
        float widthDelta = newRect.size.width - textSize.width;
        if (_cFlags.alignment == NSRightTextAlignment && widthDelta > 0) {
            newRect.size.width -= widthDelta;
            newRect.origin.x += widthDelta;
        }

    }

    return newRect;
}