这周我遇到了同样的问题。我采取了快速解决方案，
[_tableView sizeLastColumnToFit];
（但是，在与OP讨论后，这要求您在标头中使用 NSPopUpButtonCell 的子类以及 NSTableHeaderView 。我在下面附上我的解决方案）
您可以通过结合此处概述的方法来实现这一点，
- 弹出表头单元格 http://www.cocoabuilder.com/archive/cocoa/133285-placing-controls-inside-table-header-view-solution.html#133285
- 数据表标题视图 http://forums.macnn.com/79/developer-center/304072/problem-of-nspopupbuttoncell-within-nstableheaderview/
这是一个简化的片段，
// PopUpTableHeaderCell.h
#import <Cocoa/Cocoa.h>
/* Credit: http://www.cocoabuilder.com/archive/cocoa/133285-placing-controls-inside-table-header-view-solution.html#133285 */
@interface PopUpTableHeaderCell : NSPopUpButtonCell
@property (strong) NSTableHeaderCell *tableHeaderCell; // Just used for drawing the background
@end
// PopUpTableHeaderCell.m
@implementation PopUpTableHeaderCell
- (id)init {
if (self = [super init]){
// Init our table header cell and set a blank title, ready for drawing
_tableHeaderCell = [[NSTableHeaderCell alloc] init];
[_tableHeaderCell setTitle:@""];
// Set up the popup cell attributes
[self setControlSize:NSMiniControlSize];
[self setArrowPosition:NSPopUpNoArrow];
[self setBordered:NO];
[self setBezeled:NO];
[self setFont:[NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];
}
return self;
}
// We do all drawing ourselves to make our popup cell look like a header cell
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView*)controlView{
[_tableHeaderCell drawWithFrame:cellFrame inView:controlView];
// Now draw the text and image over the top
[self drawInteriorWithFrame:cellFrame inView:controlView];
}
@end
现在来说说 NSTableViewHeader 子类。
//DataTableHeaderView.h
#import <Cocoa/Cocoa.h>
/* Credit: http://forums.macnn.com/79/developer-center/304072/problem-of-nspopupbuttoncell-within-nstableheaderview/ */
@interface DataTableHeaderView : NSTableHeaderView
@end
//DataTableHeaderView.m
#import "DataTableHeaderView.h"
/* Credit: http://forums.macnn.com/79/developer-center/304072/problem-of-nspopupbuttoncell-within-nstableheaderview/ */
@implementation DataTableHeaderView
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code here.
}
return self;
}
- (void)mouseDown:(NSEvent *)theEvent {
// Figure which column, if any, was clicked
NSPoint clickedPoint = [self convertPoint:theEvent.locationInWindow fromView:nil];
NSInteger columnIndex = [self columnAtPoint:clickedPoint];
if (columnIndex < 0) {
return [super mouseDown:theEvent];
}
NSRect columnRect = [self headerRectOfColumn:columnIndex];
// I want to preserve column resizing. If you do not, remove this
if (![self mouse:clickedPoint inRect:NSInsetRect(columnRect, 3, 0)]) {
return [super mouseDown:theEvent];
}
// Now, pop the cell's menu
[[[self.tableView.tableColumns objectAtIndex:columnIndex] headerCell] performClickWithFrame:columnRect inView:self];
[self setNeedsDisplay:YES];
}
- (BOOL)isOpaque {
return NO;
}
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
}
@end
您可以在 AppDelegate 中将所有内容绑定在一起-awakeFromNib或类似的，
-(void) awakeFromNib {
/* NB the NSTableHeaderView class is changed to be an DataTableHeaderView in IB! */
NSUInteger numberOfColumnsWanted = 5;
for (NSUInteger i=0; i<numberOfColumnsWanted; i++) {
PopUpTableHeaderCell *headerCell;
headerCell = [[PopUpTableHeaderCell alloc] init];
[headerCell addItemWithTitle:@"item 1"];
[headerCell addItemWithTitle:@"item 2"];
[headerCell addItemWithTitle:@"item 3"];
NSTableColumn *column;
[column setHeaderCell:headerCell];
[column sizeToFit];
[_tableView addTableColumn:column];
}
/* If we don't do this we get a final (space filling) column with an unclickable (dummy) header */
[_tableView sizeLastColumnToFit];
}
除此之外，我还没有弄清楚如何正确纠正该区域的绘图。
看起来像是正在复制的最后一个单元格的图像。因此，我稍微更黑客的方法是在表视图中添加一个带有空白名称的额外列，并故意忽略鼠标点击。希望通过设置最后一列的显示属性，您可以使其看起来像您想要的那样。
我找不到任何允许控制该区域的 NSTableView 或 NSTableViewDelegate 方法，因此可能任何其他解决方案都会非常复杂。我也对一个好的解决方案感兴趣，但我希望这能让您开始！
