From ed1b1d2d39b080e7e45c2a92cb11e631f7ec5d94 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: Fri, 3 Sep 2021 13:25:14 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20383.=20=E8=B5=8E=E9=87=91?=
 =?UTF-8?q?=E4=BF=A1=20Swift=E7=89=88=E6=9C=AC?=
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Content-Type: text/plain; charset=UTF-8
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---
 problems/0383.赎金信.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/problems/0383.赎金信.md b/problems/0383.赎金信.md
index 64503cef..18b1de9b 100644
--- a/problems/0383.赎金信.md
+++ b/problems/0383.赎金信.md
@@ -266,6 +266,28 @@ var canConstruct = function(ransomNote, magazine) {
 };
 ```
 
+Swift：
+```swift
+func canConstruct(_ ransomNote: String, _ magazine: String) -> Bool {
+    var record = Array(repeating: 0, count: 26);
+    let aUnicodeScalarValue = "a".unicodeScalars.first!.value
+    for unicodeScalar in magazine.unicodeScalars {
+        // 通过record 记录 magazine 里各个字符出现的次数
+        let idx: Int = Int(unicodeScalar.value - aUnicodeScalarValue)
+        record[idx] += 1
+    }
+    for unicodeScalar in ransomNote.unicodeScalars {
+        // 遍历 ransomNote,在record里对应的字符个数做 -- 操作
+        let idx: Int = Int(unicodeScalar.value - aUnicodeScalarValue)
+        record[idx] -= 1
+        // 如果小于零说明在magazine没有
+        if record[idx] < 0 {
+            return false
+        }
+    }
+    return true
+}
+```
 
 
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