obsidian/笔记文件/2.笔记/AvCaptureDevice.md
2025-03-26 00:02:56 +08:00

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#ios
AVCaptureDevice是iOS开发中用于捕获硬件输入如音频或视频并配置硬件属性的类
功能AVCaptureDevice提供了对硬件设备的接口允许开发者配置底层硬件的属性如对焦、闪光灯、曝光等。它对应于一个物理采集设备如前置摄像头、后置摄像头、麦克风等。
权限申请在使用AVCaptureDevice之前需要向用户请求相应的权限。这通常通过在Info.plist中添加相应的权限字段并调用AVCaptureDevice的requestAccess方法来完成。
使用AVCaptureDevice通常与AVCaptureSession结合使用向AVCaptureSession对象提供输入数据。通过创建AVCaptureDeviceInput作为采集设备输入端并将其添加到AVCaptureSession中可以实现视频或音频的捕获。
综上所述AVCaptureDevice是iOS开发中处理硬件输入和配置的重要类为开发者提供了丰富的硬件控制功能。