你好,我正在尝试在NSTableView中使用NSPopUpButtonCell。基本上,当您在弹出窗口中选择一个项目时,我希望它显示在表视图列/行中。当弹出单元格中的项被按下时,我使用"tableView:setObject:forTableColumn:row“将其存储在数据源中,然后当表请求数据时,我检索并设置"tableView:objectValueForTableColumn:row:”中弹出单元格的状态。请找到附件我的代码。我现在完全被卡住了。我希望有人能明白这一点。提前谢谢你。
这是在控制器内部:
//Create the table columns
NSTableColumn *nameColumn = [[NSTableColumn alloc] initWithIdentifier:LXDetailItemName];
NSTableColumn *dataTypeColumn = [[NSTableColumn alloc] initWithIdentifier:LXDetailItemDataType];
NSTableColumn *deviceColumn = [[NSTableColumn alloc] initWithIdentifier:LXDetailItemDevice];
//Data type column drop down
NSPopUpButtonCell *dataTypeDropDownCell = [[NSPopUpButtonCell alloc] initTextCell:@"" pullsDown:YES];
[dataTypeDropDownCell setBordered:NO];
[dataTypeDropDownCell setEditable:YES];
NSArray *dataTypeNames = [NSArray arrayWithObjects:@"NULL", @"String", @"Money", @"Date", @"Int", nil];
[dataTypeDropDownCell addItemsWithTitles:dataTypeNames];
[dataTypeColumn setDataCell:dataTypeDropDownCell];
//Add the columns to the table
[tableView addTableColumn:nameColumn];
[tableView addTableColumn:dataTypeColumn];
[tableView addTableColumn:deviceColumn];
enter code here这是在数据源/委托类中。
enter code here
@implementation LXTestDataSource
- (id)init
{
self = [super init];
if (self)
{
tableContents = [[NSMutableArray alloc] init];
//Setup test data
NSMutableArray *keys = [NSMutableArray arrayWithObjects:LXDetailItemName, LXDetailItemDataType, LXDetailItemDevice, nil];
NSMutableArray *objects = [NSMutableArray arrayWithObjects:@"one", @"NULL", @"NULL", nil];
for (int i = 0; i < 4; i++)
{
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] initWithObjects:objects forKeys:keys];
[tableContents addObject:dictionary];
[dictionary release];
}
}
return self;
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView
{
return [tableContents count];
}
- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
{
if ([[aTableColumn identifier] isEqualToString:LXDetailItemDataType])
{
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSString *title = [rowDictionary objectForKey:LXDetailItemDataType];
NSLog(@"objectValueForTableColumn: %@", title); //DEBUG
return [NSNumber numberWithInt:[[aTableColumn dataCell] indexOfItemWithTitle:title]];
}
else if ([[aTableColumn identifier] isEqualToString:LXDetailItemDevice])
{
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSString *title = [rowDictionary objectForKey:LXDetailItemDevice];
NSLog(@"objectValueForTableColumn: %@", title); //DEBUG
return [NSNumber numberWithInt:[[aTableColumn dataCell] indexOfItemWithTitle:title]];
}
else
{
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
return [rowDictionary objectForKey:[aTableColumn identifier]];
}
}
- (void)tableView:(NSTableView *)aTableView setObjectValue:(id)anObject forTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
{
if ([[aTableColumn identifier] isEqualToString:LXDetailItemDataType])
{
NSMenuItem *menuItem = [[aTableColumn dataCell] itemAtIndex:[anObject integerValue]];
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSLog(@"%@", [menuItem title]); //DEBUG
//Update the object value at the column index
[rowDictionary setObject:[menuItem title] forKey:LXDetailItemDataType];
}
else if ([[aTableColumn identifier] isEqualToString:LXDetailItemDevice])
{
NSMenuItem *menuItem = [[aTableColumn dataCell] itemAtIndex:[anObject integerValue]];
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSLog(@"%@", [menuItem title]); //DEBUG
//Update the object value at the column index
[rowDictionary setObject:[menuItem title] forKey:LXDetailItemDevice];
}
else
{
//Get the row
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
//Update the object value at the column index
[rowDictionary setObject:anObject forKey:[aTableColumn identifier]];
}
}
@end发布于 2010-08-15 10:14:16
我想我已经弄明白了。单击菜单项后,我使用弹出单元格的"setTitle:“方法更新单元格的文本。下面是我使用的表视图委托方法。
- (void)tableView:(NSTableView *)aTableView willDisplayCell:(id)aCell forTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
{
if ([[aTableColumn identifier] isEqualToString:LXDetailItemDataType])
{
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSString *title = [rowDictionary objectForKey:LXDetailItemDataType];
[aCell setTitle:title];
}
else if ([[aTableColumn identifier] isEqualToString:LXDetailItemDevice])
{
NSMutableDictionary *rowDictionary = [tableContents objectAtIndex:rowIndex];
NSString *title = [rowDictionary objectForKey:LXDetailItemDevice];
[aCell setTitle:title];
}
}发布于 2010-08-15 13:04:54
我认为在tableView:setObjectValue:forTableColumn:row:中设置了值之后,您需要做的就是在表视图上调用reloadData,强制它使用您对数据模型所做的更改进行自我更新。NSPopUpButtonCell确实使用item索引作为其对象值,因此在willDisplayCell委托方法中没有该代码的情况下,某些事情应该可以正常工作。
另外,我建议使用菜单项的representedObject属性来告知菜单项的部分而不是标题。菜单项标题可能会被本地化,并且使用标题来存储数据值非常容易受到破坏。
https://stackoverflow.com/questions/3485862
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