PDFAnnotation(iOS)- 删除注释undo操作崩溃问题

compdfkit-tools/compdfkit-tools/Common/Views/PDFView/PDFListView/CPDFListView+UndoManager.m

@@ -76,9 +76,9 @@ static NSString *CPDFAnnotationPropertiesObservationContext = @"CPDFAnnotationPr
     if (self.activeAnnotation == annotation)
         [self updateActiveAnnotations:@[]];
     
-    [self setNeedsDisplayForPage:page];
-    if(self.activeAnnotations.count > 0)
     [page removeAnnotation:annotation];
+
+    [self setNeedsDisplayForPage:page];
 }
 
 - (void)undoRemoveAnnotation:(CPDFAnnotation *)annotation {