Swift 3 中的 AVCaptureStillImageOutput 与 AVCapturePhotoOutput

使用 Swift 3 中的 AVCaptureStillImageOutput 和 AVCapturePhotoOutput 进行拍照操作是一种强大且灵活的方式。这些功能允许我们在 iOS 设备上捕捉高质量的静态图像，并进行各种后续处理。在本文中，我们将深入探讨这两个输出类，并提供一些示例代码来演示它们的使用。

swift
let captureSession = AVCaptureSession()
// 设置输入设备和输出设备
let stillImageOutput = AVCaptureStillImageOutput()
if captureSession.canAddOutput(stillImageOutput) {
    captureSession.addOutput(stillImageOutput)
}

swift
func captureStillImage() {
    guard let connection = stillImageOutput.connection(with: .video) else { return }
    
    stillImageOutput.captureStillImageAsynchronously(from: connection) { (sampleBuffer, error) in
        if let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer) {
            // 处理捕获到的图像数据
        }
    }
}

swift
class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
    
    func capturePhoto() {
        let photoSettings = AVCapturePhotoSettings()
        photoSettings.flashMode = .auto
        
        photoOutput.capturePhoto(with: photoSettings, delegate: self)
    }
    
    func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
        if let imageData = photo.fileDataRepresentation() {
            // 处理捕获到的照片数据
        }
    }
}
let captureSession = AVCaptureSession()
// 设置输入设备和输出设备
let photoOutput = AVCapturePhotoOutput()
if captureSession.canAddOutput(photoOutput) {
    captureSession.addOutput(photoOutput)
}
let photoCaptureDelegate = PhotoCaptureDelegate()
photoOutput.setDelegate(photoCaptureDelegate, queue: DispatchQueue.main)