我有一个NSOutlineView,其中包含父项和子项列表。
使用粗体文字制作父项(带有左箭头的那些项)的最简单方法是什么?
感谢
答案 0 :(得分:2)
如果您使用的是基于单元格的大纲视图,则可以使用此委托方法来粗体显示父项:
// Assuming you use NSTextFieldCell
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item {
if ([self outlineView:outlineView numberOfChildrenOfItem:item] > 0) {
[(NSCell *)cell setFont: [NSFont boldSystemFontOfSize: ((NSCell *)cell).font.pointSize]];
} else {
[(NSCell *)cell setFont: [NSFont systemFontOfSize: ((NSCell *)cell).font.pointSize]];
}
}
否则,在基于视图的大纲视图中,您可以执行以下操作:
- (NSView *)outlineView:(NSOutlineView *)outlineView viewForTableColumn:(NSTableColumn *)tableColumn item:(id)item {
NSTableCellView *cellView = [outlineView makeViewWithIdentifier:@"MyIdentifier" owner:self];
if ([self outlineView:outlineView numberOfChildrenOfItem:item] > 0) {
[cellView.textField setFont: [NSFont boldSystemFontOfSize: cellView.textField.font.pointSize]];
} else {
[cellView.textField setFont: [NSFont systemFontOfSize: cellView.textField.font.pointSize]];
}
// do whatever else you do
return cellView;
}
或者,NSOutlineViewDelegate
' -outlineView:isGroupItem:
可能是您实际需要的内容:https://developer.apple.com/library/mac/documentation/cocoa/reference/NSOutlineViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/NSOutlineViewDelegate/outlineView:isGroupItem: