可以使用以下方法:
UnsafeMutablePointer
来声明一个可变的C字符串数组指针。var cStrings: UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>?
map
函数将Swift字符串数组转换为C字符串数组。在转换过程中,需要使用CString
函数将Swift字符串转换为C字符串。cStrings = UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>.allocate(capacity: swiftStrings.count)
cStrings.initialize(repeating: nil, count: swiftStrings.count)
swiftStrings.map { (string) -> UnsafeMutablePointer<Int8>? in
return strdup(string)
}.enumerated().forEach { (index, cString) in
cStrings?[index] = cString
}
withUnsafeMutablePointer
函数将C字符串数组指针传递给需要使用的函数或方法。withUnsafeMutablePointer(to: &cStrings) { (pointer) -> Void in
// 在这里使用C字符串数组指针
}
完整的代码示例如下:
import Foundation
func convertToCStrings(swiftStrings: [String]) -> UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>? {
var cStrings: UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>?
cStrings = UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>.allocate(capacity: swiftStrings.count)
cStrings.initialize(repeating: nil, count: swiftStrings.count)
swiftStrings.map { (string) -> UnsafeMutablePointer<Int8>? in
return strdup(string)
}.enumerated().forEach { (index, cString) in
cStrings?[index] = cString
}
return cStrings
}
let swiftStrings = ["Hello", "World"]
let cStrings = convertToCStrings(swiftStrings: swiftStrings)
withUnsafeMutablePointer(to: &cStrings) { (pointer) -> Void in
// 在这里使用C字符串数组指针
}
// 记得释放内存
cStrings?.deinitialize(count: swiftStrings.count)
cStrings?.deallocate()
这样,你就可以将Swift字符串数组转换为C字符串数组指针了。
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