swift - NSString initWithBytes 使用 swift

Question

尝试转换(工作)objC 代码:

const uint8_t * buffer = ...
NSString * password = [[NSString alloc] initWithBytes:buffer+28 length:buffer[27] encoding:NSUTF8StringEncoding];

尝试过:

let buffer: [Byte] = ...
var password = NSString(bytes: buffer+28, length: Int(buffer[27]), encoding: NSUTF8StringEncoding)

但这会使 SourceKitService 立即崩溃，如果我尝试编译，编译器也会崩溃。

我怀疑这可能与转换指针有关？

Answer 1

如果你需要的是将字节数组转换为 NSString，那么只需使用

NSString(bytes: buffer, length: buffer.length, encoding: NSUTF8StringEncoding)

如果你需要做指针前进等，然后将它转换为 UnsafePointer 如下:

NSString(bytes: UnsafePointer<Byte>(buffer) + 28, length: Int(buffer[27]), encoding: NSUTF8StringEncoding)