带NSTableView的箭头键

control:textView:doCommandBySelector:

- (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>=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;
    }

1. NSTextView MyFieldEditorClass myFieldEditor 将引用此类的一个实例。

2. - (void) setLastKnownColumn:(unsigned)aCol andRow:(unsigned) aRow

4. - (void) keyDown:(NSEvent *) event NSResponder keyDown: < 和 > 向 < 和 >

   - (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 < [theTable numberOfRows] - 1)
                   newRow = row + 1;
               break;
   
           case 123: // Left
               if (column > 1)
                   newCol = column - 1;
               break;
   
           case 124: // Right
               if (column < [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;
   }
   

5. 为笔尖中的NSTableView指定一个代理,并在代理中添加以下方法:

   - (BOOL) tableView:(NSTableView *)aTableView shouldEditColumn:(NSTableColumn *) aCol row:aRow
   {
       if ([aTableView isEqual:TheTableViewYouWantToChangeBehaviour])
           [myFieldEditor setLastKnownColumn:[[aTableView tableColumns] indexOfObject:aCol] andRow:aRow];
       return YES;
   }
   

6. 最后,给Table View的主窗口一个委托并添加方法:

   - (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;
       }
   }
   

NSTableView MBTableGrid

我想在这里回复答案,但回复按钮似乎不见了,所以当我真的只想问一个关于回复的问题时,我不得不证明一个答案。

我使我用作委托的类从NSResponder而不是NSObject继承,并在awakeFromNib中将nextResponder设置为该类。然后,我能够使用keydown事件捕获按键。当然,我连接了IBOutlet并在Interface Builder中设置了代理。

头文件

//  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

这是m文件。

//  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