如何解决错误协议快速录制视频？

Question

我正在尝试使用AVFoundation录制视频。 在目标c中，我有一个协议定义要委托给.h：

 @protocol AVCaptureManagerDelegate <NSObject>
 - (void)didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
                                  error:(NSError *)error;
 @end


 @interface AVCaptureManager : NSObject

 @property (nonatomic, assign) id<AVCaptureManagerDelegate> delegate;

并迅速需要以下代码使用recordingDelegate保存到URL中，但需要委托：

self.movieFileOut.startRecordingToOutputFileURL(filePath, recordingDelegate)

我很困惑..谢谢！

Answer 1

这是一些快速录制视频的代码。 首先是定义一个委托：

import Foundation
import AVFoundation
import UIKit

class VideoDelegate : NSObject, AVCaptureFileOutputRecordingDelegate
{

    func captureOutput(captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAtURL outputFileURL: NSURL!, fromConnections connections: [AnyObject]!, error: NSError!) {
    println("capture output : finish recording to \(outputFileURL)")
    }

    func captureOutput(captureOutput: AVCaptureFileOutput!, didStartRecordingToOutputFileAtURL fileURL: NSURL!, fromConnections connections: [AnyObject]!) {
        println("capture output: started recording to \(fileURL)")
    }

}

之后，调用startRecordingToOutputFileURL（假设会话是AVCaptureSession）：

let videoDelegate = VideoDelegate()
let fileOutput = AVCaptureMovieFileOutput()
session.addOutput(fileOutput)
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! NSString
let outputPath = "\(documentsPath)/output.mov"
let outputFileUrl = NSURL(fileURLWithPath: outputPath)
fileOutput.startRecordingToOutputFileURL(outputFileUrl, recordingDelegate: videoDelegate)