我有一个 NSOutlineView,其中包含父项目和子项目的列表。
将父项(带有开始箭头的项)设置为粗体文本的最简单方法是什么?
谢谢
最佳答案
如果您使用基于单元格的大纲 View ,则可以使用此委托(delegate)方法将父项加粗:
// 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 View 的大纲 View 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
的 -outlineView:isGroupItem:
可能就是您真正要寻找的:https://developer.apple.com/library/mac/documentation/cocoa/reference/NSOutlineViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/NSOutlineViewDelegate/outlineView:isGroupItem :
关于objective-c - NSOutlineView : how to make parent items bold?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25076136/