ios 在 Xcode 中设置前置摄像头
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Set front-facing camera in Xcode
提问by Damian
Set front-facing camera in Xcode. How can I do that? Set front-facing camera in Xcode.
在 Xcode 中设置前置摄像头。我怎样才能做到这一点？在 Xcode 中设置前置摄像头。
AVCaptureSession *session = [AVCaptureSession new];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
[session setSessionPreset:AVCaptureSessionPreset640x480];
else
[session setSessionPreset:AVCaptureSessionPresetPhoto];
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
require( error == nil, bail );
isUsingFrontFacingCamera = NO;
if ( [session canAddInput:deviceInput] )
[session addInput:deviceInput];
stillImageOutput = [AVCaptureStillImageOutput new];
[stillImageOutput addObserver:self forKeyPath:@"capturingStillImage" options:NSKeyValueObservingOptionNew context:AVCaptureStillImageIsCapturingStillImageContext];
if ( [session canAddOutput:stillImageOutput] )
[session addOutput:stillImageOutput];
回答by djromero
Add this method to iterate over existing devices checking its position:
添加此方法以遍历现有设备以检查其位置：
- (AVCaptureDevice *)frontCamera {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if ([device position] == AVCaptureDevicePositionFront) {
return device;
}
}
return nil;
}
Then, replace:
然后，替换：
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
with:
和：
AVCaptureDevice *device = [self frontCamera];
回答by vdugnist
Since iOS 10 devicesWithMediaType:is deprecated. You should use AVCAptureDeviceDiscoverySession.
由于 iOS 10devicesWithMediaType:已弃用。你应该使用AVCAptureDeviceDiscoverySession.
- (AVCaptureDevice *)frontCamera {
return [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:@[ AVCaptureDeviceTypeBuiltInWideAngleCamera ]
mediaType:AVMediaTypeVideo
position:AVCaptureDevicePositionFront].devices.firstObject;
}
回答by Yogesh Tarsariya
**.h file
@interface ViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
.m File
-(IBAction)Btn_Ok:(id)sender
{
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Device has no camera"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[myAlertView show];
}
else
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.cameraDevice=UIImagePickerControllerCameraDeviceFront;
[self presentViewController:picker animated:YES completion:NULL];
}
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.yourimg.image = chosenImage;
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:NULL];
}
