From eaa0504acbdc195c0804ecaebd033528786e7939 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=81=E5=AE=A2=E5=AD=A6=E4=BC=9F?= <qxuwei@yeah.net>
Date: Wed, 18 Aug 2021 19:47:30 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20206.=E5=8F=8D=E8=BD=AC?=
 =?UTF-8?q?=E9=93=BE=E8=A1=A8=20Swift=E7=89=88=E6=9C=AC?=
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---
 problems/0206.翻转链表.md | 37 +++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/problems/0206.翻转链表.md b/problems/0206.翻转链表.md
index 8bb359bd..0c850d52 100644
--- a/problems/0206.翻转链表.md
+++ b/problems/0206.翻转链表.md
@@ -334,6 +334,43 @@ fun reverseList(head: ListNode?): ListNode? {
 }
 ```
 
+Swift：
+```swift
+/// 双指针法 (迭代)
+/// - Parameter head: 头结点
+/// - Returns: 翻转后的链表头结点
+func reverseList(_ head: ListNode?) -> ListNode? {
+    if head == nil || head?.next == nil {
+        return head
+    }
+    var pre: ListNode? = nil
+    var cur: ListNode? = head
+    var temp: ListNode? = nil
+    while cur != nil {
+        temp = cur?.next
+        cur?.next = pre
+        pre = cur
+        cur = temp
+    }
+    return pre
+}
+
+/// 递归
+/// - Parameter head: 头结点
+/// - Returns: 翻转后的链表头结点
+func reverseList2(_ head: ListNode?) -> ListNode? {
+    return reverse(pre: nil, cur: head)
+}
+func reverse(pre: ListNode?, cur: ListNode?) -> ListNode? {
+    if cur == nil {
+        return pre
+    }
+    let temp: ListNode? = cur?.next
+    cur?.next = pre
+    return reverse(pre: cur, cur: temp)
+}
+```
+
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
 * B站视频：[代码随想录](https://space.bilibili.com/525438321)