3枚の画像があります。カメラのオーバーレイ画像に 1 つずつ読み込みます。次に、スナップショットを撮る必要があります。しかし、ボタンをクリックすると、特定の画像のスナップショットが撮られます。imageName.png を captureStillImageWithOverlay に入れると、その画像のスナップショットのみが取得され、オーバーレイに存在する場合は他の画像は取得されません
ボタンクリックコード:
- (void)ButtonPressed {
[[self captureManager] captureStillImageWithOverlay:[UIImage imageNamed:@"img2.png"]];
}
画像をロードする:
-(void)loadNextPage:(int)index
{
int countFlag=0;
for(int i=index*4;i<(index+1)*4;i++)
{
UIButton *imageView=[[UIButton alloc]initWithFrame:CGRectMake((320*index)+countFlag*80+ 2, 5, 75, 75)];
imageView.tag=i+1;
[imageView addTarget:self action:@selector(imageViewClicked:) forControlEvents:UIControlEventTouchUpInside];
[imageView.layer setBorderColor:[UIColor lightGrayColor].CGColor];
[imageView.layer setBorderWidth:1.0f];
switch ((i+1)%5) {
case 0:
[imageView setImage:[UIImage imageNamed:@"img1.png"] forState:UIControlStateNormal];
break;
case 1:
[imageView setImage:[UIImage imageNamed:@"img2.png"] forState:UIControlStateNormal];
break;
case 2:
[imageView setImage:[UIImage imageNamed:@"img3.png"] forState:UIControlStateNormal];
break;
}
[myScrollView addSubview:imageView];
[imageView release];
countFlag++;
}
}
オーバーレイ画像をキャプチャ:
- (void)captureStillImageWithOverlay:(UIImage*)overlay
{
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];
CGSize imageSize = [image size];
CGSize overlaySize = [overlay size];
UIGraphicsBeginImageContext(imageSize);
[image drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];
CGFloat xScaleFactor = imageSize.width / 320;
CGFloat yScaleFactor = imageSize.height / 480;
[overlay drawInRect:CGRectMake(30 * xScaleFactor, 100 * yScaleFactor, overlaySize.width * xScaleFactor, overlaySize.height * yScaleFactor)]; // rect used in AROverlayViewController was (30,100,260,200)
UIImage *combinedImage = UIGraphicsGetImageFromCurrentImageContext();
[self setStillImage:combinedImage];
UIGraphicsEndImageContext();
[image release];
[[NSNotificationCenter defaultCenter] postNotificationName:kImageCapturedSuccessfully object:nil];
}];
}