c - @在Objective-C 2.0中合成结构的C数组

我正在尝试在Mac OS X API(音频队列服务)中但在Cocoa(实际上只是Foundation)应用程序(实际上只是一个“工具”)中遵循C++接口(interface)的教程。它具有如下结构:

static const int kNumberBuffers = 3;                              // 1
struct AQPlayerState {
    AudioStreamBasicDescription   mDataFormat;                    // 2
    AudioQueueRef                 mQueue;                         // 3
    AudioQueueBufferRef           mBuffers[kNumberBuffers];       // 4
    AudioFileID                   mAudioFile;                     // 5
    UInt32                        bufferByteSize;                 // 6
    SInt64                        mCurrentPacket;                 // 7
    UInt32                        mNumPacketsToRead;              // 8
    AudioStreamPacketDescription  *mPacketDescs;                  // 9
    bool                          mIsRunning;                     // 10
};

将第4项转换为Objective-C时遇到了很多麻烦，因为我不知道如何@synthesize一个C数组。具体来说，这就是我到目前为止所拥有的:

PlayerState.h

#import <Foundation/Foundation.h>
#import <AudioToolbox/AudioQueue.h>

@interface PlayerState : NSObject {
  AudioStreamBasicDescription   dataFormat;
  AudioQueueRef                 queue;
  AudioQueueBufferRef           _buffers[3];
  int                           audioFile; // make this an actual type?
  UInt32                        bufferByteSize;
  SInt64                        currentPacket;
  UInt32                        numPacketsToRead;
  AudioStreamPacketDescription* packetDescs;
  bool                          isRunning;
}

@property(assign) AudioStreamBasicDescription   dataFormat;
@property(assign) AudioQueueRef                 queue;
@property(assign) AudioQueueBufferRef           buffers;
@property(assign) int                           audioFile;
@property(assign) UInt32                        bufferByteSize;
@property(assign) SInt64                        currentPacket;
@property(assign) UInt32                        numPacketsToRead;
@property(assign) AudioStreamPacketDescription* packetDescs;
@property(assign) bool                          isRunning;

@end

PlayerState.m

#import "PlayerState.h"

@implementation PlayerState

@synthesize dataFormat;
@synthesize queue;
@synthesize buffers;
@synthesize audioFile;
@synthesize bufferByteSize;
@synthesize currentPacket;
@synthesize numPacketsToRead;
@synthesize packetDescs;
@synthesize isRunning;

@end

@synthesize buffers无法按以下方式进行编译:“错误:综合属性'buffers'必须与兼容的ivar命名相同，或者必须显式命名ivar”

显然，这是因为相应的ivar被命名为_buffers而不是buffers-但这是必要的，因为我无法将属性定义为数组(可以吗？@property(assign) *AudioQueueBufferRef buffers是语法错误)

如何将ivar定义为AudioQueueBufferRef结构数组，或综合属性使其引用_buffers数组？

最佳答案

尝试:

@synthesize buffers = _buffers;