ios虚拟摄像头插件，iPhone苹果替换相机软件，通过xposed框架实现

下载地址：https://www.pan38.com/share.php?code=BCjmZ 提取码：8888 【仅供学习参考】

技术原理
通过MobileSubstrate注入系统相机进程
Hook AVFoundation框架的AVCaptureSession相关方法
替换原始视频流数据

核心实现代码

%hook AVCaptureVideoDataOutput
- (void)setSampleBufferDelegate:(id<AVCaptureVideoDataOutputSampleBufferDelegate>)delegate queue:(dispatch_queue_t)queue {
    %orig; // 调用原始方法
    [VideoFaker shared].realDelegate = delegate; // 保存原始代理
    [VideoFaker setupVirtualCamera]; // 初始化虚拟摄像头
}
%end

@interface VideoFaker : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate>
+ (instancetype)shared;
- (void)replaceVideoBuffer:(CMSampleBufferRef)buffer;
@end
代码语言：txt
AI代码解释
 VideoFaker {
    id<AVCaptureVideoDataOutputSampleBufferDelegate> _realDelegate;
}

- (void)captureOutput:(AVCaptureOutput *)output 
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer 
       fromConnection:(AVCaptureConnection *)connection {

    // 替换为自定义视频帧
    CMSampleBufferRef fakeBuffer = [self generateFakeFrame];
    [_realDelegate captureOutput:output didOutputSampleBuffer:fakeBuffer fromConnection:connection];
    CFRelease(fakeBuffer);
}

- (CMSampleBufferRef)generateFakeFrame {
    // 生成虚拟图像逻辑
    CVPixelBufferRef pixelBuffer = [FrameGenerator createTestPattern];
    return [BufferConverter sampleBufferFromPixelBuffer:pixelBuffer];
}
@end

基于SwiftUI框架设计，包含摄像头切换、滤镜选择和视频源配置功能：

import SwiftUI
import AVKit

struct CameraView: View {
    @StateObject private var model = CameraModel()
    @State private var showSourcePicker = false
    @State private var selectedFilter = "None"

    var body: some View {
        VStack {
            // 视频预览区域
            ZStack {
                if let frame = model.currentFrame {
                    Image(uiImage: frame)
                        .resizable()
                        .scaledToFit()
                        .colorMultiply(selectedFilter == "None" ? .white : .accentColor)
                } else {
                    Color.black
                }

                VStack {
                    HStack {
                        Button(action: { model.switchCamera() }) {
                            Image(systemName: "arrow.triangle.2.circlepath")
                                .padding(8)
                                .background(Circle().fill(.ultraThinMaterial))
                        }

                        Spacer()

                        Menu(selectedFilter) {
                            ForEach(["None", "Sepia", "Mono", "Vintage"], id: \.self) { filter in
                                Button(filter) { 
                                    selectedFilter = filter
                                    model.applyFilter(filter)
                                }
                            }
                        }
                    }
                    .padding()

                    Spacer()

                    // 视频源选择按钮
                    Button(action: { showSourcePicker.toggle() }) {
                        Label("Video Source", systemImage: "film")
                            .padding()
                            .background(Capsule().fill(.blue))
                    }
                }
            }

            // 控制按钮区域
            HStack {
                Button(action: model.toggleRecording) {
                    Circle()
                        .fill(model.isRecording ? .red : .gray)
                        .frame(width: 60, height: 60)
                        .overlay(
                            Circle()
                                .stroke(.white, lineWidth: 3)
                        )
                }

                Spacer()

                Button(action: model.capturePhoto) {
                    Circle()
                        .fill(.white)
                        .frame(width: 70, height: 70)
                        .overlay(
                            Circle()
                                .stroke(.blue, lineWidth: 3)
                        )
                }
            }
            .padding()
        }
        .sheet(isPresented: $showSourcePicker) {
            SourcePickerView(selectedSource: $model.videoSource)
        }
    }
}

视频选择器（PHPickerViewController）、时长滑块控制（UISlider）和视频裁剪导出功能

import UIKit
import PhotosUI
import AVKit

class VideoPickerViewController: UIViewController {

    // MARK: - UI Components
    private let selectButton: UIButton = {
        let btn = UIButton(type: .system)
        btn.setTitle("选择本地视频", for: .normal)
        btn.backgroundColor = .systemBlue
        btn.tintColor = .white
        btn.layer.cornerRadius = 8
        return btn
    }()

    private let timeLabel: UILabel = {
        let label = UILabel()
        label.text = "选择时长: 0秒"
        label.textAlignment = .center
        return label
    }()

    private let slider: UISlider = {
        let slider = UISlider()
        slider.minimumValue = 0
        slider.maximumValue = 60
        return slider
    }()

    private var selectedAsset: AVAsset?

    // MARK: - Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        setupActions()
    }

    // MARK: - Setup
    private func setupUI() {
        view.backgroundColor = .white
        let stack = UIStackView(arrangedSubviews: [selectButton, timeLabel, slider])
        stack.axis = .vertical
        stack.spacing = 20
        stack.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(stack)

        NSLayoutConstraint.activate([
            stack.centerYAnchor.constraint(equalTo: view.centerYAnchor),
            stack.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 40),
            stack.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -40)
        ])
    }

    private func setupActions() {
        selectButton.addTarget(self, action: #selector(selectVideo), for: .touchUpInside)
        slider.addTarget(self, action: #selector(sliderValueChanged), for: .valueChanged)
    }

    // MARK: - Actions
    @objc private func selectVideo() {
        var config = PHPickerConfiguration()
        config.filter = .videos
        config.selectionLimit = 1

        let picker = PHPickerViewController(configuration: config)
        picker.delegate = self
        present(picker, animated: true)
    }

    @objc private func sliderValueChanged() {
        let selectedTime = Int(slider.value)
        timeLabel.text = "选择时长: \(selectedTime)秒"
    }

    private func processVideo(with duration: CMTime) {
        guard let asset = selectedAsset else { return }

        let startTime = CMTime(seconds: 0, preferredTimescale: 600)
        let endTime = CMTime(seconds: Double(slider.value), preferredTimescale: 600)
        let timeRange = CMTimeRange(start: startTime, end: endTime)

        let exportSession = AVAssetExportSession(asset: asset, 
                                               presetName: AVAssetExportPresetHighestQuality)
        exportSession?.outputURL = FileManager.default.temporaryDirectory
            .appendingPathComponent("trimmed_video.mp4")
        exportSession?.outputFileType = .mp4
        exportSession?.timeRange = timeRange

        exportSession?.exportAsynchronously {
            DispatchQueue.main.async {
                if exportSession?.status == .completed {
                    self.playVideo(at: exportSession!.outputURL!)
                }
            }
        }
    }

    private func playVideo(at url: URL) {
        let player = AVPlayer(url: url)
        let vc = AVPlayerViewController()
        vc.player = player
        present(vc, animated: true) {
            player.play()
        }
    }
}

// MARK: - PHPickerViewControllerDelegate
extension VideoPickerViewController: PHPickerViewControllerDelegate {
    func picker(_ picker: PHPickerViewController, 
               didFinishPicking results: [PHPickerResult]) {
        picker.dismiss(animated: true)

        guard let result = results.first else { return }
        result.itemProvider.loadObject(ofClass: AVAsset.self) { [weak self] (asset, error) in
            guard let self = self, let asset = asset as? AVAsset else { return }

            DispatchQueue.main.async {
                self.selectedAsset = asset
                let duration = asset.duration.seconds
                self.slider.maximumValue = Float(duration)
                self.timeLabel.text = "选择时长: 0秒/\(Int(duration))秒"
            }
        }
    }
}