objective-c – 带NSTableView的箭头键

在Sequel Pro中,我们使用了一个不同的(在我的眼睛更简单)方法：我们实现了控件：textView：doCommandBySelector：在TableView的委托中.这个方法很难找到 – 它可以在NSControlTextEditingDelegate Protocol Reference中找到. (记住NSTableView是NSControl的一个子类)

长篇小说,这是我们想出来的(我们没有覆盖左/右箭头键,因为那些用于在单元格内导航,我们使用Tab左/右)

请注意,这只是Sequel Pro源代码中的一段代码,并且不起作用

- (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;
    }