前言最近使用视频库<AVFoundation/AVFoundation.h>，遇到一个尴尬的问题
iOS 10 以前
//用来返回是前置摄像头还是后置摄像头
- (AVCaptureDevice *)cameraWithPostion:(AVCaptureDevicePosition)position{
//返回和视频录制相关的默认设备
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
//遍历这些设备返回跟postion相关的设备
for (AVCaptureDevice *device in devices) {
if ([device position] == position) {
return device;
}
}
return nil;
}
iOS10 之后
- (AVCaptureDevice *)cameraWithPostion:(AVCaptureDevicePosition)position{
AVCaptureDeviceDiscoverySession *devicesIOS10 = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera] mediaType:AVMediaTypeVideo position];
NSArray *devicesIOS = devicesIOS10.devices;
for (AVCaptureDevice *device in devicesIOS) {
if ([device position] == position) {
return device;
}
}
return nil;
}
