'inout String'不能轉換爲'UnsafePointer <String>'

Question

我使用的功能需要UnsafePointer<String>。

如何從字符串中獲得UnsafePointer<String>？

試圖&someString給我的錯誤：

'inout String' is not convertible to 'UnsafePointer<String>' 

Answer 1

&someString創建CMutablePointer<String>。

要將其轉換爲UnsafePointer，最簡單的解決方法是調用特殊功能：

withUnsafePointer(&someString) { unsafePointer in 
    //do something with the unsafePointer 
}