IOS devicesWithMediaType 弃用

Question

我目前使用的方法:

NSArray *captureDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];

获取设备列表，但 XCode 给我警告:

改用 AVCaptureDeviceDiscoverySession

我看过 documentation但不知道如何访问设备数组

AVCaptureDeviceDiscoverySession *session = [[AVCaptureDeviceDiscoverySession alloc]init];
???

Answer 1

创建 AVCaptureDeviceDiscoverySession根据您的要求，然后调用 devices 方法以获取符合 session 条件的当前可用设备的 Array

代码:

AVCaptureDeviceDiscoverySession *captureDeviceDiscoverySession = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera] 
                                      mediaType:AVMediaTypeVideo 
                                       position:AVCaptureDevicePositionBack];
NSArray *captureDevices = [captureDeviceDiscoverySession devices];

swift 4+

let discoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: .video, position: .back)

Available

Device types

Media types

Position