How to capture the image automatically in iPhone? - iphone

Question

I'm new to iPhone development, I have used UIImagePickerController to capture the image manually, but i want to capture the image automatically, Is it possible to do that.
please help me.
Thanks in advance

Answer 1

Try This. In this I have saved the screen shot in photos album
-(void)screenShotCapture
{
//-- Screen Capture --------------------------------------------------------------------//
UIImage *image = nil;
UIGraphicsBeginImageContext(loginBgImgVw.frame.size);
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MM-dd-yyyy hh:mm:ss"];
[formatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *dateToday = [formatter stringFromDate:[NSDate date]];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(375, 0, 600, 44)];
[label setText:dateToday];
NSString *fileNameStr = [NSString stringWithFormat:#"%#_Login_%#",providerIdStr,dateToday];
[label setText:fileNameStr];
label.backgroundColor = [UIColor clearColor];
[loginBgImgVw addSubview:label];
[formatter release];
loginBgImgVw.frame = CGRectMake(10, 0, 1006, 669);
[loginBgImgVw.layer renderInContext: UIGraphicsGetCurrentContext()];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[label removeFromSuperview];
//=--
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docspath = [paths objectAtIndex:0];
NSLog(#"path=--%#",paths);
NSString *dataPath = [docspath stringByAppendingPathComponent:[NSString stringWithFormat:#"ProviderID_%#",providerIdStr]];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
{
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil];
}
NSString *savedImagePath = [dataPath stringByAppendingPathComponent:#"Login_Provider.png"];
NSData *imageData = UIImageJPEGRepresentation(image, 0.2);
if ([screenCapturNameAry count] != 0)
{
if ([screenCapturNameAry containsObject:#"Login"])
{
[imageData writeToFile:savedImagePath atomically:NO];
}
}
UIImageWriteToSavedPhotosAlbum([self loadImage:#"Login_Provider"],self,#selector(image:didFinishSavingWithError:contextInfo:),NULL);
//--------------------------------------------------------------------------------------//
}
- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo
{
if (error == nil)
{
NSLog(#"Login Image saved successfully.");
}
else
{
NSLog(#"Error occurred:%#",[error localizedDescription]);
}
}
You can get the saved image using following method
- (UIImage*)loadImage:(NSString*)imageName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"ProviderID_%#",providerIdStr]];
NSString *fullPath = [dataPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.png",imageName]];
return [UIImage imageWithContentsOfFile:fullPath];
}

Answer 2

To take the screenshot you can use the following code.
UIGraphicsBeginImageContext(self.window.bounds.size);
[self.window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * data = UIImagePNGRepresentation(image);
[data writeToFile:#"screen.png" atomically:YES];
For Ratina display device you have to check:
if ([[UIScreen mainScreen] respondsToSelector:#selector(scale)])
UIGraphicsBeginImageContextWithOptions(self.window.bounds.size, NO, [UIScreen mainScreen].scale);
else
UIGraphicsBeginImageContext(self.window.bounds.size);