Merge multiple views in an uiview - ios

Question

In my app I've to take a picture and add the following information over the pic, these information are:
Weather forecast
Temperature
GPS location
Until now I obtained these information by using GPS and a web service for weather forecast (open weather map). I made so:
I take the picture with the standard UIImagePicker
I put a button on my interface to show the picture to the user
When the user press the button the app open a new ViewController in which I show the picture just take and I added 2 UILabel (one for temperature and one for the location) and a UIImageView (to show an icon about the weather forecast). The UILabels and the UIImageView I draw directly on the StoryBoard.
Now I need to merge the picture with the 2 UILabel and with the UIImageView, there's a way to merge them in a single UIImageView?
I've to do that to save the picture with the weather forecast and location
UPDATE
I create a button to save the picture with the labels and the imageview and the code I wrote it's this:
- (IBAction)buttonSavePicture:(UIButton *)sender {
[self.imageView addSubview:self.labelPlace];
[self.imageView addSubview:self.labelTemperature];
[self.imageView addSubview:self.imageViewWeather];
UIGraphicsBeginImageContext(self.imageView.bounds.size);
[self.imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:self.filename];
[UIImageJPEGRepresentation(finalImage, 1) writeToFile:filePath atomically:YES];
}
But when I go to see in the Documents directory if I saved correctly the picture I don't find it.

Answer 1

Yes, you can easily do it by capturing them. Follow steps.
Create a small parent view in storyboard put all controls you want to capture together inside. Create an outlet say captureView.
Call the following function when you need.
-(void)capture{
UIGraphicsBeginImageContext(self.captureView.bounds.size);
[self.captureView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *capturedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//FINAL OUTPUT
self.imageView.image=capturedImage;
}
Cheers.

Answer 2

If you using iOS7 have a look at the snapshotViewAfterScreenUpdates: and the drawViewHierarchyInRect:afterScreenUpdates: this one is used to include or capture subviews like labels etc. this will return a single UIView of everything on screen, then save that as a UIImage.
CGSize imgSize = CGSizeMake(self.view.bounds.size.width, self.view.bounds.size.height);
UIGraphicsBeginImageContextWithOptions(imgSize, NO , 0.0f);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *weatherImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(weatherImage, nil, nil, nil; //save to saved image album
If all went right you should have your "screenshot" in the photo album