Swift 3 - AVCapture 自定义相机视图

使用 Swift 3 中的 AVCapture 框架可以轻松地自定义相机视图。AVCapture 提供了强大的功能，可以让开发者控制相机的各种参数，例如焦距、曝光、白平衡等。本文将介绍如何使用 AVCapture 来创建一个自定义的相机视图，并提供一个简单的案例代码。

swift
import AVFoundation

swift
class CameraView: UIView, AVCaptureVideoDataOutputSampleBufferDelegate {
    // 代码实现
}

swift
class CameraView: UIView, AVCaptureVideoDataOutputSampleBufferDelegate {
    let session = AVCaptureSession()
    
    // 代码实现
}

swift
class CameraView: UIView, AVCaptureVideoDataOutputSampleBufferDelegate {
    let session = AVCaptureSession()
    
    // 配置相机的输入和输出
    func setupCamera() {
        guard let device = AVCaptureDevice.default(for: .video) else { return }
        
        do {
            let input = try AVCaptureDeviceInput(device: device)
            
            if session.canAddInput(input) {
                session.addInput(input)
            }
            
            let output = AVCaptureVideoDataOutput()
            output.setSampleBufferDelegate(self, queue: DispatchQueue.main)
            
            if session.canAddOutput(output) {
                session.addOutput(output)
            }
            
            session.startRunning()
        } catch {
            print(error.localizedDescription)
        }
    }
    
    // 代码实现
}

swift
class CameraView: UIView, AVCaptureVideoDataOutputSampleBufferDelegate {
    let session = AVCaptureSession()
    
    // 配置相机的输入和输出
    func setupCamera() {
        // 代码实现
    }
    
    // 获取相机输出的视频帧数据
    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
        // 处理视频帧数据
    }
    
    // 代码实现
}

swift
import UIKit
import AVFoundation
class ViewController: UIViewController {
    let cameraView = CameraView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        cameraView.frame = view.bounds
        view.addSubview(cameraView)
        
        cameraView.setupCamera()
        
        let captureButton = UIButton(type: .system)
        captureButton.setTitle("拍摄照片", for: .normal)
        captureButton.addTarget(self, action: #selector(capturePhoto), for: .touchUpInside)
        captureButton.frame = CGRect(x: 0, y: view.bounds.height - 50, width: view.bounds.width, height: 50)
        view.addSubview(captureButton)
    }
    
    @objc func capturePhoto() {
        // 拍摄照片
    }
}