添加0027.移除元素 Swift 版本

problems/0027.移除元素.md

@@ -216,6 +216,25 @@ fn main() {
     println!("{:?}",remove_element(&mut nums, 5));
 }
 ```
+
+Swift:
+
+```swift
+func removeElement(_ nums: inout [Int], _ val: Int) -> Int {
+    var slowIndex = 0
+
+    for fastIndex in 0..<nums.count {
+        if val != nums[fastIndex] {
+            if slowIndex != fastIndex {
+                nums[slowIndex] = nums[fastIndex]
+            }
+            slowIndex += 1
+        }
+    }
+    return slowIndex
+}
+```
+
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