Swift NSData Initialiser

Question

我想从Obj-C库中实现这个方法。

func bleDidReceiveData(data: UnsafeMutablePointer<UInt8>, length: Int32) {
    var d = NSData(bytes: data as [UInt8], length: length)
}

然而，当我尝试初始化NSData时，它给了我这个错误

Cannot find an initialiser for type NSData that accepts an argument of type (bytes:[UInt8],length:int32)

在Obj-C中，这是以这种方式完成的

NSData *d = [NSData dataWithBytes:data length:length];

Answer 1

func bleDidReceiveData(data: UnsafeMutablePointer<UInt8>, length: Int32) {
    var d = NSData(bytes: UnsafeMutablePointer<Void>(data), length: Int(length))
}