【综合】注释hover偶发crash修复

PDF Office/PDF Master/Class/PDFWindowController/PDFListView/CPDFListViewExtension/CPDFListView+Tool.m

@@ -566,6 +566,9 @@
 }
 
 - (void)showHUDHint:(CPDFAnnotation *)newActiveAnnotation {
+    if (self.window == nil) {
+        return;
+    }
     CGRect rect = [self convertRect:newActiveAnnotation.bounds fromPage:newActiveAnnotation.page];
     if (rect.size.width != 0 && rect.size.height != 0) {
         CPDFListHoverAnnotationViewController *popViewController = [[CPDFListHoverAnnotationViewController alloc] initWithNibName:@"CPDFListHoverAnnotationViewController" bundle:[NSBundle mainBundle] annotation:newActiveAnnotation];