blocks|key|4490671|text|嗯，这并不容易，但我设法做到了，而不需要使用RRSpreadSheet或甚至其他控件。下面是你要做的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4490672|4490673|创建NSTextView的子类，这将是字段编辑器。本例将使用名称MyFieldEditorClass，myFieldEditor将引用此类的实例。|ordered-list-item|offset|length|style|CODE|4490674|向MyFieldEditorClass添加一个名为"-+(void)+setLastKnownColumn:(unsigned)aCol+andRow:(unsigned)+aRow“或类似的方法，并让它保存另一个名为"setTableView:”的方法的两个输入参数值，并让它将NSTableView对象保存在某个地方，或者除非有其他方法可以从字段编辑器中获取NSTableView对象，否则使用该方法。|4490675|添加另一个名为-+(void)+keyDown:(NSEvent+*)+event的方法。这实际上覆盖了NSResponder的keyDown:。源代码应该是(请注意，StackOverflow的MarkDown正在将<和>更改为行和列：(NSEvent+*)+&lt;：(NSEvent*)+event+{+unsigned+newRow+=&lt;，newCol+=+column；switch+(event+keyCode)+{+case+126:+//+Up+if+(>)+newRow+=&lt;-+1；break；案例125:+//向下if+(row+<+theTable+numberOfRows+-+1)+newRow+=+row+%2B+1；break；案例123:+//+Left+if+(column+>+1)+newCol+=+column+-+1；break；例124:+//+Right+if+(column+<+theTable+numberOfColumns+-+1)+newCol+=+column+%2B+1；break；default:+super+keyDown:event；return；}+theTable+selectRow:newRow+byExtendingSelection:NO；theTable+editColumn:newCol+row:newRow+withEvent:nil+select:YES；row+=+newRow；column+=+newCol；在nib中添加一个委托，并在委托中添加method:|4490676|(BOOL)+tableView:(NSTableView+*)aTableView+shouldEditColumn:(NSTableColumn+*)+aCol+NSTableView+:aRow{+if+(aTableView+in+}|unordered-list-item|4490677|Give+:TheTableViewYouWantToChangeBehaviour)+[myFieldEditor+setLastKnownColumn:[aTableView+tableColumns+indexOfObject:aCol]+andRow:aRow]；return+YES；}|4490678|Finally，为表视图的主窗口添加一个委托，并添加method:|4490679|(id)+windowWillReturnFieldEditor:(NSWindow+*)+aWindow+toObject:(id)+anObject+{+if+(anObject‘s:TheTableViewYouWantToChangeBehaviour){+if+(!+myFieldEditor+)+{+myFieldEditor+=+[MyFieldEditorClass+alloc+]；myFieldEditor+setTableView:anObject；}+return+myFieldEditor；}+else+{+return+nil；}+}|4490680|4490681|运行这个程序，试一试！|4490682|entityMap^0|0|0|2|A|W|I|1F|D|0|1|I|Q|1T|0|7|Y|1G|B|1S|8|31|1|33|1|3N|4|4S|4|6M|1|6X|4|0|0|1|1|1|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|13|8|@$F|14|G|15|H|I]|$F|16|G|17|H|I]|$F|18|G|19|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|1A|8|@$F|1B|G|1C|H|I]|$F|1D|G|1E|H|I]]|9|@]|A|$]]|$1|L|3|M|5|E|7|1F|8|@$F|1G|G|1H|H|I]|$F|1I|G|1J|H|I]|$F|1K|G|1L|H|I]|$F|1M|G|1N|H|I]|$F|1O|G|1P|H|I]|$F|1Q|G|1R|H|I]|$F|1S|G|1T|H|I]|$F|1U|G|1V|H|I]|$F|1W|G|1X|H|I]]|9|@]|A|$]]|$1|N|3|O|5|P|7|1Y|8|@]|9|@]|A|$]]|$1|Q|3|R|5|E|7|1Z|8|@]|9|@]|A|$]]|$1|S|3|T|5|E|7|20|8|@]|9|@]|A|$]]|$1|U|3|V|5|P|7|21|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|22|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|23|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|24|8|@]|9|@]|A|$]]]|10|$]]

Well it isn't easy but I managed to do it without having to use RRSpreadSheet or even another control. Here's what you have to do:

<ol>
<li>Create a subclass of <code>NSTextView</code>, this will be the field editor. For this example the name <code>MyFieldEditorClass</code> will be used and <code>myFieldEditor</code> will refer to an instance of this class.</li>
<li>Add a method to <code>MyFieldEditorClass</code> called "<code>- (void) setLastKnownColumn:(unsigned)aCol andRow:(unsigned) aRow</code>" or something similar, and have it save both the input parameter values somewhere.</li>
<li>Add another method called "setTableView:" and have it save the NSTableView object somewhere, or unless there is another way to get the NSTableView object from the field editor, use that.</li>
<li>Add another method called <code>- (void) keyDown:(NSEvent *) event</code>. This is actually overriding the <code>NSResponder</code>'s <code>keyDown:</code>. The source code should be (be aware that StackOverflow's MarkDown is changing <code>&lt;</code> and <code>&gt;</code> to <code>&amp;lt;</code> and <code>&amp;gt;</code>):

<pre><code>- (void) keyDown:(NSEvent *) event
{
 unsigned newRow = row, newCol = column;
 switch ([event keyCode])
 {
 case 126: // Up
 if (row)
 newRow = row - 1;
 break;

 case 125: // Down
 if (row &lt; [theTable numberOfRows] - 1)
 newRow = row + 1;
 break;

 case 123: // Left
 if (column &gt; 1)
 newCol = column - 1;
 break;

 case 124: // Right
 if (column &lt; [theTable numberOfColumns] - 1)
 newCol = column + 1;
 break;

 default:
 [super keyDown:event];
 return;
 }

 [theTable selectRow:newRow byExtendingSelection:NO];
 [theTable editColumn:newCol row:newRow withEvent:nil select:YES];
 row = newRow;
 column = newCol;
}
</code></pre></li>
<li>Give the NSTableView in your nib a delegate, and in the delegate add the method:

<pre><code>- (BOOL) tableView:(NSTableView *)aTableView shouldEditColumn:(NSTableColumn *) aCol row:aRow
{
 if ([aTableView isEqual:TheTableViewYouWantToChangeBehaviour])
 [myFieldEditor setLastKnownColumn:[[aTableView tableColumns] indexOfObject:aCol] andRow:aRow];
 return YES;
}
</code></pre></li>
<li>Finally, give the Table View's main window a delegate and add the method:

<pre><code>- (id) windowWillReturnFieldEditor:(NSWindow *) aWindow toObject:(id) anObject
{
 if ([anObject isEqual:TheTableViewYouWantToChangeBehaviour])
 {
 if (!myFieldEditor)
 {
 myFieldEditor = [[MyFieldEditorClass alloc] init];
 [myFieldEditor setTableView:anObject];
 }
 return myFieldEditor;
 }
 else
 {
 return nil;
 }
}
</code></pre></li>
</ol>

Run the program and give it a go!

blocks|key|3645352|text|与其强迫NSTableView做一些它不是为此而设计的事情，不如考虑使用专门为此目的而设计的东西。我有一个开源的电子表格控件，它可以做你需要的事情，或者你至少可以扩展它来做你需要的事情：MBTableGrid|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3645353|entityMap|0|LINK|mutability|MUTABLE|url|http://github.com/mattball/mbtablegrid/^0|4|B|2L|B|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Rather than forcing <code>NSTableView</code> to do something it wasn't designed for, you may want to look at using something designed for this purpose. I've got an open source spreadsheet control which may do what you need, or you may at least be able to extend it to do what you need: <a href="http://github.com/mattball/mbtablegrid/" rel="nofollow noreferrer">MBTableGrid</a>

blocks|key|3645443|text|在Sequel+Pro中，我们使用了一种不同的(在我看来更简单)方法:我们在TableView的委托中实现了control:textView:doCommandBySelector:。这种方法很难找到--可以在NSControlTextEditingDelegate协议参考中找到。(请记住，NSTableView是NSControl的子类)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|3645444|长话短说，这是我们想出来的(我们没有覆盖左/右箭头键，因为这些键是用来在单元格中导航的。我们使用Tab向左/向右移动)|3645445|请注意，这只是Sequel+Pro源代码的一小段，并不能按原样工作|3645446|-+(BOOL)control:(NSControl+*)control+textView:(NSTextView+*)textView+doCommandBySelector:(SEL)command
{
++++NSUInteger+row,+column;

++++row+=+[tableView+editedRow];
++++column+=+[tableView+editedColumn];

++++//+Trap+down+arrow+key
++++if+(++[textView+methodForSelector:command]+==+[textView+methodForSelector:@selector(moveDown:)]+)
++++{
++++++++NSUInteger+newRow+=+row%2B1;
++++++++if+(newRow>=numRows)+return+TRUE;+//check+if+we're+already+at+the+end+of+the+list
++++++++if+(column>=+numColumns)+return+TRUE;+//the+column+count+could+change

++++++++[tableContentView+selectRowIndexes:[NSIndexSet+indexSetWithIndex:newRow]+byExtendingSelection:NO];
++++++++[tableContentView+editColumn:column+row:newRow+withEvent:nil+select:YES];
++++++++return+TRUE;
++++}

++++//+Trap+up+arrow+key
++++else+if+(++[textView+methodForSelector:command]+==+[textView+methodForSelector:@selector(moveUp:)]+)
++++{
++++++++if+(row==0)+return+TRUE;+//already+at+the+beginning+of+the+list
++++++++NSUInteger+newRow+=+row-1;

++++++++if+(newRow>=numRows)+return+TRUE;
++++++++if+(column>=+numColumns)+return+TRUE;

++++++++[tableContentView+selectRowIndexes:[NSIndexSet+indexSetWithIndex:newRow]+byExtendingSelection:NO];
++++++++[tableContentView+editColumn:column+row:newRow+withEvent:nil+select:YES];
++++++++return+TRUE;
++++}|code-block|syntax|javascript|3645447|entityMap^0|1I|11|2X|W|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|W|8|@]|E|@]|F|$]]|$1|I|3|J|5|6|7|X|8|@]|E|@]|F|$]]|$1|K|3|L|5|M|7|Y|8|@]|E|@]|F|$N|O]]|$1|P|3|-4|5|6|7|Z|8|@]|E|@]|F|$]]]|Q|$]]

In Sequel Pro we used a different (and in my eyes simpler) method: We implemented <code>control:textView:doCommandBySelector:</code> in the delegate of the TableView. This method is hard to find -- it can be found in the NSControlTextEditingDelegate Protocol Reference. (Remember that NSTableView is a subclass of NSControl)

Long story short, here's what we came up with (we didn't override left/right arrow keys, as those are used to navigate within the cell. We use Tab to go left/right)

Please note that this is just a snippet from the Sequel Pro source code, and does not work as is

<pre><code>- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)command
{
 NSUInteger row, column;

 row = [tableView editedRow];
 column = [tableView editedColumn];

 // Trap down arrow key
 if ( [textView methodForSelector:command] == [textView methodForSelector:@selector(moveDown:)] )
 {
 NSUInteger newRow = row+1;
 if (newRow&gt;=numRows) return TRUE; //check if we're already at the end of the list
 if (column&gt;= numColumns) return TRUE; //the column count could change

 [tableContentView selectRowIndexes:[NSIndexSet indexSetWithIndex:newRow] byExtendingSelection:NO];
 [tableContentView editColumn:column row:newRow withEvent:nil select:YES];
 return TRUE;
 }

 // Trap up arrow key
 else if ( [textView methodForSelector:command] == [textView methodForSelector:@selector(moveUp:)] )
 {
 if (row==0) return TRUE; //already at the beginning of the list
 NSUInteger newRow = row-1;

 if (newRow&gt;=numRows) return TRUE;
 if (column&gt;= numColumns) return TRUE;

 [tableContentView selectRowIndexes:[NSIndexSet indexSetWithIndex:newRow] byExtendingSelection:NO];
 [tableContentView editColumn:column row:newRow withEvent:nil select:YES];
 return TRUE;
 }
</code></pre>

blocks|key|3645519|text|我想在这里回复答案，但回复按钮似乎丢失了，所以当我真的只想问一个关于回复的问题时，我被迫证明了答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3645520|无论如何，我已经看到了一些关于覆盖表视图的-keyDown事件的答案，即对TableView进行子类化，但根据我到目前为止读过的每一本Objective-C书和几个苹果培训视频，你几乎不应该对某个核心类进行子类化。事实上，它们中的每一个都表明C程序员着迷于子类化，而这不是Objective-C的工作方式；Objective-C都是关于助手和委托的，而不是子类化。|3645521|那么，我是否应该忽略任何对subclass的回应，因为这似乎与Objective-C的戒律直接矛盾？|3645522|-编辑|3645523|我发现了一些不需要对NSTableView进行子类化就可以工作的东西。虽然我确实将继承从NSObject移动到了NSResponder，但我并没有完全将NSTableView子类化。我只是添加了覆盖keyDown事件的功能。|3645524|我使我用作委托的类继承自NSResponder而不是NSObject，并在awakeFromNib中将nextResponder设置为该类。然后，我可以使用keydown事件捕获按键操作。当然，我连接了IBOutlet并在Interface+Builder中设置了委托。|3645525|下面是我的代码，其中包含显示键陷阱所需的最少内容：|3645526|头文件|3645527|//++AppController.h

#import+<Cocoa/Cocoa.h>

@interface+AppController+:+NSResponder+{

++++IBOutlet+NSTableView+*toDoListView;
++++NSMutableArray+*toDoArray;
}

-(int)numberOfRowsInTableView:(NSTableView+*)aTableView;

-(id)tableView:(NSTableView+*)tableView
objectValueForTableColumn:(NSTableColumn+*)aTableColumn
+++++++++++row:(int)rowIndex;

@end|code-block|syntax|javascript|3645528|这是m文件。|3645529|//++AppController.m
#import+"AppController.h"

@implementation+AppController

-(id)init
{
++++[super+init];
++++toDoArray+=+[[NSMutableArray+alloc]+init];
++++return+self;
}

-(void)dealloc
{
++++[toDoArray+release];
++++toDoArray+=+nil;
++++[super+dealloc];
}

-(void)awakeFromNib
{
++++[toDoListView+setNextResponder:self];
}

-(int)numberOfRowsInTableView:(NSTableView+*)aTableView
{
++++return+[toDoArray+count];
}

-(id)tableView:(NSTableView+*)tableView
++++objectValueForTableColumn:(NSTableColumn+*)aTableColumn
++++++++++++++++++++++++++row:(int)rowIndex
{
++++NSString+*value+=+[toDoArray+objectAtIndex:rowIndex];
++++return+value;
}

-+(void)keyDown:(NSEvent+*)theEvent
{
++++//NSLog(@"key+pressed:+%25@",+theEvent);
++++if+(theEvent.keyCode+==+51+%7C%7C+theEvent.keyCode+==+117)
++++{
++++++++[toDoArray+removeObjectAtIndex:[toDoListView+selectedRow]];
++++++++[toDoListView+reloadData];
++++}
}
@end|3645530|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|16|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|17|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|18|8|@]|9|@]|A|$S|T]]|$1|U|3|V|5|6|7|19|8|@]|9|@]|A|$]]|$1|W|3|X|5|R|7|1A|8|@]|9|@]|A|$S|T]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

I wanted to reply to the answers here but the reply button seems to be missing so I'm forced to proved an answer when I really just want to ask a question about the replies.

Anyway, I've seen a few answers for overriding the -keyDown event of the table view that say to subclass the TableView but according to every Objective-C book I've read so far, and several Apple training videos, you should very rarely if ever subclass one of the core classes. In fact every single one of them makes the point that C programmers have a fascination with subclassing and that's not how Objective-C works; that Objective-C is all about helpers and delegates not subclassing.

So, should I just ignore any of the responses that say to subclass as this seems to be in direct contradiction to the precepts of Objective-C?

--- Edit ---

I found something that worked without subclassing the NSTableView. While I do move the inheritance up one notch on the chain from NSObject to NSResponder I'm not totally subclassing the NSTableView. I'm just adding the ability to override the keyDown event.

I made the class I was using as a delegate inherit from NSResponder instead of NSObject and set the nextResponder to that class in awakeFromNib. I was then able to trap key presses using the keydown event. I of course connected the IBOutlet and set the delegate in Interface Builder.

Here's my code with the minimum needed to show the trapping of the key:

Header file

<pre><code>// AppController.h

#import &lt;Cocoa/Cocoa.h&gt;

@interface AppController : NSResponder {

 IBOutlet NSTableView *toDoListView;
 NSMutableArray *toDoArray;
}

-(int)numberOfRowsInTableView:(NSTableView *)aTableView;

-(id)tableView:(NSTableView *)tableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn
 row:(int)rowIndex;

@end
</code></pre>

Here's the m file. 

<pre><code>// AppController.m
#import "AppController.h"

@implementation AppController

-(id)init
{
 [super init];
 toDoArray = [[NSMutableArray alloc] init];
 return self;
}

-(void)dealloc
{
 [toDoArray release];
 toDoArray = nil;
 [super dealloc];
}

-(void)awakeFromNib
{
 [toDoListView setNextResponder:self];
}

-(int)numberOfRowsInTableView:(NSTableView *)aTableView
{
 return [toDoArray count];
}

-(id)tableView:(NSTableView *)tableView
 objectValueForTableColumn:(NSTableColumn *)aTableColumn
 row:(int)rowIndex
{
 NSString *value = [toDoArray objectAtIndex:rowIndex];
 return value;
}

- (void)keyDown:(NSEvent *)theEvent
{
 //NSLog(@"key pressed: %@", theEvent);
 if (theEvent.keyCode == 51 || theEvent.keyCode == 117)
 {
 [toDoArray removeObjectAtIndex:[toDoListView selectedRow]];
 [toDoListView reloadData];
 }
}
@end
</code></pre>

Is it possible to navigate an NSTableView's editable cell around the NSTableView using arrow keys and enter/tab? For example, I want to make it feel more like a spreadsheet.

The users of this application are expected to edit quite a lot of cells (but not all of them), and I think it would be easier to do so if they didn't have to double-click on each cell.

Arrow keys with NSTableView

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否可以使用箭头键和enter/Tab键在NSTableView周围导航NSTableView的可编辑单元格？例如，我想让它看起来更像一个电子表格。这个应用程序的用户需要编辑相当多的单元格(但不是所有单元格)，我认为如果他们不必双击每个单元格，这样做会更容易。

问带有NSTableView的箭头键
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问带有NSTableView的箭头键EN