'inout String'不能转换为'UnsafePointer <string>'</string>

Question

我正在使用一个UnsafePointer<String>的函数。

如何从字符串中获取UnsafePointer<String>？

尝试&someString会给我一个错误：

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

Answer 1

&someString创建CMutablePointer<String>。

要将其转换为UnsafePointer，最简单的解决方案是调用特殊函数：

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