有没有人知道如何在NSOutlineView的可编辑中制作单元格?我使用来自苹果的样本代码,我似乎无法让它工作。
我正在设置它,以便当您在NSOutlineView中的单元格上快速连续单击两次时,该单元格变为可编辑,以便用户可以更新单元格内的文本。 (与xcode和邮件等相同)。
我包含了这个控制器的大部分代码,徒劳地希望有人能发现我做错了什么,这非常令人沮丧。我知道正在调用shouldEditTableColumn
,因为它在双击时返回NSLog消息。
@implementation DisplayHierarchyController
- (void)awakeFromNib {
// cache the reused icon images
folderImage = [[[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kGenericFolderIcon)] retain];
[folderImage setSize:NSMakeSize(16,16)];
objectImage = [[[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kGenericPreferencesIcon)] retain];
[objectImage setSize:NSMakeSize(16,16)];
diagramImage = [[[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kGenericEditionFileIcon)] retain];
[diagramImage setSize:NSMakeSize(16,16)];
//
// Tell the outline view to use a special type of cell
//NSTableColumn *tableColumn = [[outline tableColumns] objectAtIndex: 0];
//ImageTextCell *imageTextCell = [[[ImageTextCell alloc] init] autorelease];
//[imageTextCell setEditable:YES];
//[tableColumn setDataCell:imageTextCell];
//
[[[outline tableColumns] objectAtIndex: 0] setEditable: YES];
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldEditTableColumn:(NSTableColumn *)tableColumn item:(id)item {
NSLog(@"edit %@", tableColumn);
return YES;
}
- (NSCell *)outlineView:(NSOutlineView *)outlineView dataCellForTableColumn:(NSTableColumn *)tableColumn item:(id)item {
ImageTextCell *imageTextCell = [[[ImageTextCell alloc] init] autorelease];
[imageTextCell setEditable:YES];
return imageTextCell;
}
// Returns the object that will be displayed in the tree
- (id)outlineView: (NSOutlineView *)outlineView child: (int)index ofItem: (id)item {
if(item == nil)
return [[document children] objectAtIndex: index];
if([item isKindOfClass: [Item class]])
return [[item children] objectAtIndex: index];
return document;
}
- (BOOL)outlineView: (NSOutlineView *)outlineView isItemExpandable: (id)item {
if([item isKindOfClass: [Item class]])
return [[item children] count]>0;
return NO;
}
- (int)outlineView: (NSOutlineView *)outlineView numberOfChildrenOfItem: (id)item {
if(item == nil)
return document.children.count;
if([item isKindOfClass: [Item class]])
return [[item children] count];
return 0;
}
- (id)outlineView: (NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item {
if([item isKindOfClass: [Item class]])
return [item name];
return @"n/a";
}
- (void)outlineView:(NSOutlineView *)outlineView setObjectValue:(id)object forTableColumn:(NSTableColumn *)tableColumn byItem:(id)item {
NSLog(@"setObjectValue called");
}
- (void)outlineView:(NSOutlineView *)olv willDisplayCell:(NSCell*)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item {
[cell setEditable: YES];
[cell setAllowsEditingTextAttributes: YES];
[(ImageTextCell*)cell setImage: objectImage];
}
- (BOOL)control:(NSControl *)control textShouldBeginEditing:(NSText *)fieldEditor {
return YES;
}
- (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor {
if ([[fieldEditor string] length] == 0) {
// don't allow empty node names
return NO;
} else {
return YES;
}
}
@end
答案 0 :(得分:11)
我知道这是一篇非常古老的帖子,但如果有人遇到同样的问题,这可能不是与代码相关的问题。对于我的情况,这是一个与XIB本身的值设置有关的问题。
因此,假设您已经复制了所有Apple代码,并且您已经启动并运行了NSOutlineView,以及一些仍然无法编辑的内容,请转到您的XIB并设置以下单元格的NSTextField设置想要可编辑。在我的情况下,行为设置默认设置为 none 。对你来说也许是同样的问题
干杯。
答案 1 :(得分:6)
列本身是否设置为可编辑?通常,你会在IB中这样做。
另外,您是否在数据源中实施了the outlineView:setObjectValue:
method?
答案 2 :(得分:2)
我刚刚发现我可以通过改变shouldEditTableColumn
来“假装”。它真的不理想,但它的工作原理。经过这么多个小时试图让它发挥作用,至少这是:
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldEditTableColumn:(NSTableColumn *)tableColumn item:(id)item {
NSLog(@"edit %@", tableColumn);
[outline editColumn:0 row:[outline selectedRow] withEvent:[NSApp currentEvent] select:YES];
return YES;
}
答案 3 :(得分:1)
我找到了解决这个问题的方法。在IB中设置列的数据单元格(在awakeFromNib中以编程方式也应该工作)。我实际上使用2个不同的自定义单元类。我的解决方案:
NSCell *cell = [tableColumn dataCellForRow: [outlineView rowForItem: item]];
if ([item isKindOfClass: [NSString class]])
return [[[ShadowTextCell alloc] initTextCell: [cell stringValue]] autorelease];
return cell;