在Delphi中为Avplayer设置用户代理

Question

我试图根据以下简短代码在德尔菲中为AvPlayer设置User Agent：

NSMutableDictionary* * *headers = [NSMutableDictionary dictionary];
[headers setObject:@"YourHeader"forKey:@"User-Agent"];
self.urlAsset = [AVURLAsset URLAssetWithURL:self.videoURL options:@{@"AVURLAssetHTTPHeaderFieldsKey" : headers}];
self.playerItem = [AVPlayerItem playerItemWithAsset:self.urlAsset];
self.player = [AVPlayer playerWithPlayerItem:self.playerItem];

我在这部分方面遇到麻烦：

options:@{@"AVURLAssetHTTPHeaderFieldsKey" : headers}

我已将标题称为NSMutableDictionary和setobject，并具有必要字段，但是我应该如何将其分配给键AVURLAssetHTTPHeaderFieldsKey？

我正在使用Alcinoe库中的ALVideoPlayer，我需要在此处设置用户代理。

Answer 1

it 出现与此相当：

uses
  Macapi.Foundation, Macapi.Helpers, Macapi.AVFoundation;
var
  LDictionary: Pointer;
  LOptions: NSDictionary;
  LURLAsset: AVURLAsset;
  LVideoURL: NSURL;
begin
  // Make sure you initialize LVideoURL with whatever value it is expecting
  LDictionary := TNSDictionary.OCClass.dictionaryWithObject(StringToID('YourHeader'), StringToID('User-Agent'));
  LOptions := TNSDictionary.Wrap(TNSDictionary.OCClass.dictionaryWithObject(LDictionary, StringToID('AVURLAssetHTTPHeaderFieldsKey')));
  LURLAsset := TAVURLAsset.OCClass.URLAssetWithURL(LVideoURL, LOptions);
  // etc
end;