How to take Picture Programmatically in iphone App using device camera? - iphone

Question

In iPhone App,
Can we take pictures at some perticular time intervals programmatically by using iphone device camera ?
If yes then please let me know how we can take pictures programmatically in iPhone App?
Please Help and Suggest.
Thanks,

Answer 1

UIImagePickerController has a takePicture method that can be called programmatically.

Answer 2

You can use UIImagePickerController has a takePicture method to take picture.
For more control over the picture you can use AVFoundation header which contains avcapturestillimageoutput method to capture images. More Info

Answer 3

import this file in .h :
AVFoundation/AVCaptureInput.h
AVFoundation/AVCaptureDevice.h
AVFoundation/AVCaptureOutput.h
AVFoundation/AVMediaFormat.h
put in .m :
- (AVCaptureDevice *)frontCamera
{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices)
{
if ([device position] == AVCaptureDevicePositionFront)
{
return device;
}
}
return nil;
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection
{
CGImageRef cgImage = [self imageFromSampleBuffer:sampleBuffer];
self.theImage = [UIImage imageWithCGImage: cgImage ];
CGImageRelease( cgImage );
NSCalendar *sysCalendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateFormatter *df = [[NSDateFormatter alloc]init];
df.calendar = sysCalendar;
[df setDateFormat:#"dd_MM_yyyy hh:mm:ss"];
StrCapture = [NSString stringWithFormat:#"%#.jpeg",[df stringFromDate:[NSDate date]]];
NSLog(#"StrCapture : %#",StrCapture);
NSData *imageData = UIImageJPEGRepresentation(self.theImage,1);
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:StrCapture];
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil];
NSLog(#"ImagePAth : %#",fullPath);
}
- (CGImageRef) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer
{
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferLockBaseAddress(imageBuffer,0);
uint8_t baseAddress = (uint8_t )CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 0);
size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef newContext = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
CGImageRef newImage = CGBitmapContextCreateImage(newContext);
CGContextRelease(newContext);
CGColorSpaceRelease(colorSpace);
CVPixelBufferUnlockBaseAddress(imageBuffer,0);
return newImage;
}