我正在使用AVCaptureSession拍照并将照片存储到相册中。当我点击按钮时,它会拍摄快照并存储到相册。但是当我使用横向模式时,然后单击它存储横向模式的按钮会导致倒置静止图像。
代码:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self setCaptureSession:[[AVCaptureSession alloc] init]];
[self addVideoInputFrontCamera:NO]; // set to YES for Front Camera, No for Back camera
[self addStillImageOutput];
[self setPreviewLayer:[[AVCaptureVideoPreviewLayer alloc] initWithSession:[self captureSession]] ];
[[self previewLayer] setVideoGravity:AVLayerVideoGravityResizeAspectFill];
CGRect layerRect = [[[self view] layer] bounds];
[[self previewLayer]setBounds:layerRect];
[[self previewLayer] setPosition:CGPointMake(CGRectGetMidX(layerRect),CGRectGetMidY(layerRect))];
[[[self view] layer] addSublayer:[self previewLayer]];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(saveImageToPhotoAlbum) name:kImageCapturedSuccessfully object:nil];
[[self captureSession] startRunning];
camera=[UIButton buttonWithType:UIButtonTypeCustom];
[camera setImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
[camera setFrame:CGRectMake(150, 10, 40, 30)];
[camera addTarget:self action:@selector(takephoto:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:camera];
}
拍照的按钮:
-(void)takephoto:(id)sender{
[self captureStillImage];
}
- (void)captureStillImage
{
AVCaptureConnection *videoConnection = nil;
for (AVCaptureConnection *connection in [[self stillImageOutput] connections]) {
for (AVCaptureInputPort *port in [connection inputPorts]) {
if ([[port mediaType] isEqual:AVMediaTypeVideo]) {
videoConnection = connection;
break;
}
}
if (videoConnection) {
break;
}
}
NSLog(@"about to request a capture from: %@", [self stillImageOutput]);
[[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:videoConnection
completionHandler:^(CMSampleBufferRef imageSampleBuffer, NSError *error) {
CFDictionaryRef exifAttachments = CMGetAttachment(imageSampleBuffer, kCGImagePropertyExifDictionary, NULL);
if (exifAttachments) {
NSLog(@"attachements: %@", exifAttachments);
} else {
NSLog(@"no attachments");
}
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];
UIImage *image = [[UIImage alloc] initWithData:imageData];
[self setStillImage:image];
// [image release];
[[NSNotificationCenter defaultCenter] postNotificationName:kImageCapturedSuccessfully object:nil];
}];
}
答案 0 :(得分:6)
您需要根据设备的方向设置videoConnection的videoOrientation属性。在设置AVCaptureConnection后,在captureStillImage
中执行此操作。
UIDeviceOrientation deviceOrientation =
[[UIDevice currentDevice] orientation];
AVCaptureVideoOrientation avcaptureOrientation;
if ( deviceOrientation == UIDeviceOrientationLandscapeLeft )
avcaptureOrientation = AVCaptureVideoOrientationLandscapeRight;
else if ( deviceOrientation == UIDeviceOrientationLandscapeRight )
avcaptureOrientation = AVCaptureVideoOrientationLandscapeLeft;
[videoConnection setVideoOrientation:avcaptureOrientation];