iOS9 中捕捉 Live Photos 的 API

iOS9中引入了一个新的功能，即捕捉Live Photos。Live Photos是一种图像格式，可以在拍摄时记录一小段时间的视频和音频。这个功能可以为用户提供更加生动和有趣的照片体验。

swift
import AVFoundation
AVCaptureDevice.requestAccess(for: .video) { granted in
    if granted {
        // 用户已授权使用相机
    } else {
        // 用户未授权使用相机
    }
}
AVCaptureDevice.requestAccess(for: .audio) { granted in
    if granted {
        // 用户已授权使用麦克风
    } else {
        // 用户未授权使用麦克风
    }
}

swift
import AVFoundation
let session = AVCaptureSession()
guard let camera = AVCaptureDevice.default(for: .video) else {
    fatalError("无法获取摄像头设备")
}
guard let microphone = AVCaptureDevice.default(for: .audio) else {
    fatalError("无法获取麦克风设备")
}
do {
    let cameraInput = try AVCaptureDeviceInput(device: camera)
    let microphoneInput = try AVCaptureDeviceInput(device: microphone)
    
    if session.canAddInput(cameraInput) {
        session.addInput(cameraInput)
    }
    
    if session.canAddInput(microphoneInput) {
        session.addInput(microphoneInput)
    }
} catch {
    fatalError("无法创建输入设备")
}
let photoOutput = AVCapturePhotoOutput()
if session.canAddOutput(photoOutput) {
    session.addOutput(photoOutput)
}
session.startRunning()

swift
import AVFoundation
let settings = AVCapturePhotoSettings()
settings.isHighResolutionPhotoEnabled = true
settings.livePhotoMovieFileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("livePhoto.mov")
settings.livePhotoVideoCodecType = .h264

swift
import AVFoundation
photoOutput.capturePhoto(with: settings, delegate: self)

swift
import AVFoundation
extension ViewController: AVCapturePhotoCaptureDelegate {
    func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
        guard let livePhotoMovieFileURL = photo.livePhotoMovieFileURL else {
            return
        }
        
        // 处理捕捉到的Live Photos
    }
}