在Mac上修改表标题 [英] Modifying Table Headers on Mac

问题描述

我已经能够找到关于使用UITableView在iOS上修改表格标题的教程 - 但是他没能找到任何Mac开发的信息。有没有人知道任何好的资源/步骤来修改表格的外观？

Zach

解决方案

要更改表格标题的显示方式，您需要对NSTableHeaderCell进行子类化，在其中一个绘图方法中执行您自己的自定义绘图，然后用每个子类的实例替换每个列的标题单元格。

您还可能发现需要将NSTableHeaderView子类化以绘制任何没有标题单元格可见的空格，并替换 cornerView

 <$ c $ 
 c> for（NSTableColumn * column in [tableView tableColumns]）{
 [column setHeaderCell：
 [[[MyHeaderCell alloc] 
 initTextCell：[[column headerCell] stringValue]] 
 autorelease]]; 
} 
  

这里是NSTableHeaderCell子类的起点：

  @interface MyHeaderCell：NSTableHeaderCell 
 {
} 
  - （void）drawWithFrame：（CGRect）cellFrame 
 highlight：（BOOL）isHighlighted 
 inView：（NSView *）view; 
 @end 
 
 @implementation MyHeaderCell 
 
  - （void）drawWithFrame：（CGRect）cellFrame 
 highlight：（BOOL）isHighlighted 
 inView ：（NSView *）view 
 {
 CGRect fillRect，borderRect; 
 CGRectDivide（cellFrame，& borderRect，& fillRect，1.0，CGRectMaxYEdge）; 
 
 NSGradient * gradient = [[NSGradient alloc] 
 initWithStartingColor：[NSColor whiteColor] 
 endingColor：[NSColor colorWithDeviceWhite：0.9 alpha：1.0]]; 
 [gradient drawInRect：fillRect angle：90.0]; 
 [gradient release]; 
 
 if（isHighlighted）{
 [[NSColor colorWithDeviceWhite：0.0 alpha：0.1] set]; 
 NSRectFillUsingOperation（fillRect，NSCompositeSourceOver）; 
} 
 
 [[NSColor colorWithDeviceWhite：0.8 alpha：1.0] set]; 
 NSRectFill（borderRect）; 
 
 [self drawInteriorWithFrame：CGRectInset（fillRect，0.0，1.0）inView：view]; 
} 
 
  - （void）drawWithFrame：（CGRect）cellFrame inView：（NSView *）view 
 {
 [self drawWithFrame：cellFrame highlight：NO inView：view ]; 
} 
 
  - （void）highlight：（BOOL）isHighlighted 
 withFrame：（NSRect）cellFrame 
 inView：（NSView *）view 
 {
 [self drawWithFrame：cellFrame highlighted：isHighlighted inView：view]; 
} 
 
 @end 
  

I've been able to find tutorials on modifying the table headers on iOS using UITableView - but havent been able to find any info for mac development. Does anyone know of any good resources / steps to modify the appearance of tables?

Zach

解决方案

To change how the table headers appear you need to subclass NSTableHeaderCell, perform your own custom drawing in one of its drawing methods, then replace the header cells of each column with an instance of your subclass.

You may also find that you need to subclass NSTableHeaderView to draw the any space where no header cells are visible, and to replace the cornerView of the table view.

This should get you started:

for (NSTableColumn *column in [tableView tableColumns]) {
   [column setHeaderCell:
      [[[MyHeaderCell alloc]
                      initTextCell:[[column headerCell] stringValue]]
                      autorelease]];
}

And here’s a starting point for a subclass of NSTableHeaderCell:

@interface MyHeaderCell : NSTableHeaderCell
{
}
- (void)drawWithFrame:(CGRect)cellFrame
          highlighted:(BOOL)isHighlighted
               inView:(NSView *)view;
@end

@implementation MyHeaderCell

- (void)drawWithFrame:(CGRect)cellFrame
          highlighted:(BOOL)isHighlighted
               inView:(NSView *)view
{
   CGRect fillRect, borderRect;
   CGRectDivide(cellFrame, &borderRect, &fillRect, 1.0, CGRectMaxYEdge);

   NSGradient *gradient = [[NSGradient alloc]
      initWithStartingColor:[NSColor whiteColor]
                endingColor:[NSColor colorWithDeviceWhite:0.9 alpha:1.0]];
   [gradient drawInRect:fillRect angle:90.0];
   [gradient release];

   if (isHighlighted) {
      [[NSColor colorWithDeviceWhite:0.0 alpha:0.1] set];
      NSRectFillUsingOperation(fillRect, NSCompositeSourceOver);
   }

   [[NSColor colorWithDeviceWhite:0.8 alpha:1.0] set];
   NSRectFill(borderRect);

   [self drawInteriorWithFrame:CGRectInset(fillRect, 0.0, 1.0) inView:view];
}

- (void)drawWithFrame:(CGRect)cellFrame inView:(NSView *)view
{
   [self drawWithFrame:cellFrame highlighted:NO inView:view];
}

- (void)highlight:(BOOL)isHighlighted
        withFrame:(NSRect)cellFrame
           inView:(NSView *)view
{
   [self drawWithFrame:cellFrame highlighted:isHighlighted inView:view];
}

@end

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