From c3aa75a48a36b582150fa89173882b2ecf4534ba Mon Sep 17 00:00:00 2001
From: Lee <18611401994@163.com>
Date: Wed, 13 May 2020 15:20:04 +0800
Subject: [PATCH 1/2] Fix NSCollectionView sections update bug in AppKit
 extension.

---
 Sources/Extensions/AppKitExtension.swift | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Sources/Extensions/AppKitExtension.swift b/Sources/Extensions/AppKitExtension.swift
index 6b30b76..da4fd84 100644
--- a/Sources/Extensions/AppKitExtension.swift
+++ b/Sources/Extensions/AppKitExtension.swift
@@ -123,6 +123,22 @@ public extension NSCollectionView {
             animator().performBatchUpdates({
                 setData(changeset.data)
 
+                if !changeset.sectionDeleted.isEmpty {
+                    deleteSections(IndexSet(changeset.sectionDeleted))
+                }
+
+                if !changeset.sectionInserted.isEmpty {
+                    insertSections(IndexSet(changeset.sectionInserted))
+                }
+
+                if !changeset.sectionUpdated.isEmpty {
+                    reloadSections(IndexSet(changeset.sectionUpdated))
+                }
+
+                for (source, target) in changeset.sectionMoved {
+                    moveSection(source, toSection: target)
+                }
+                
                 if !changeset.elementDeleted.isEmpty {
                     deleteItems(at: Set(changeset.elementDeleted.map { IndexPath(item: $0.element, section: $0.section) }))
                 }

From a0571e72817bf873d7ad25cb391e4d683708e139 Mon Sep 17 00:00:00 2001
From: Lee <18611401994@163.com>
Date: Wed, 10 Jun 2020 14:09:06 +0800
Subject: [PATCH 2/2] Adjust grammar

---
 Sources/Extensions/AppKitExtension.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/Extensions/AppKitExtension.swift b/Sources/Extensions/AppKitExtension.swift
index da4fd84..eacc04c 100644
--- a/Sources/Extensions/AppKitExtension.swift
+++ b/Sources/Extensions/AppKitExtension.swift
@@ -138,7 +138,7 @@ public extension NSCollectionView {
                 for (source, target) in changeset.sectionMoved {
                     moveSection(source, toSection: target)
                 }
-                
+
                 if !changeset.elementDeleted.isEmpty {
                     deleteItems(at: Set(changeset.elementDeleted.map { IndexPath(item: $0.element, section: $0.section) }))
                 }