Send Screenshot of ViewController to other ViewController - ios

Question

I would like to take a screenshot of ViewController, blur the image, send it to ProfileViewController, then set it as the background of ProfileViewController. This should not be that difficult as each task is pretty straightforward, I am just having difficulty finding the correct syntax as to how to do this.
The way I want this to work is such:
The user starts on ViewController, the main view.
Upon the click of a button (labeled profTap) the user is taken to ProfileViewController.
ProfileViewController is displayed through a segue (present modally) with its background set as a blurred image of the previous view from ViewController.
If someone could show me with code how to send the image to ProfileViewController I would be most appreciative. For reference, here is my code below that I have for now of the ViewController. I believe I am capturing the image correctly, I am jsut not sure what to do from here to send it to the ProfileViewController.
#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>
#import "ProfileViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)profTap:(id)sender {
UIGraphicsBeginImageContext(self.mainView.bounds.size);
[self.mainView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *mainViewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *data = UIImagePNGRepresentation(mainViewImage);
// NEXT: blur image, and send to ProfileViewControoler
// UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"mainViewImage"]];
// [self.view addSubview:backgroundView];
}
- (IBAction)unwindToHome:(UIStoryboardSegue *)segue {
}
#end

Answer 1

Try something like that
#interface ViewController ()
#property(nonatomic, strong) UIImage *backgroundImage;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)profTap:(id)sender {
}
- (IBAction)unwindToHome:(UIStoryboardSegue *)segue {
self.backgroundImage = [self takeSnapShot];
[self performSegueWithIdentifier:#"nameofyoursegue" sender:nil];
}
//function to take a screenshot of your current controller
- (UIImage *)takeSnapShot {
// Create the image context
CGRect bounds = self.mainView.bounds;
UIGraphicsBeginImageContextWithOptions(bounds.size, NO,
self.view.window.screen.scale);
[self.navigationController.view drawViewHierarchyInRect:bounds
afterScreenUpdates:NO];
// Get the snapshot
UIImage *snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
// Be nice and clean your mess up
UIGraphicsEndImageContext();
return snapshotImage;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"nameofyoursegue"]) {
ProfileViewController *profileViewController =
[segue destinationViewController];
[profileViewController setBackgroundImage:self.backgroundImage];
}
}
#end
PhotoViewController
#interface ProfileViewController ()
#property(nonatomic, weak) IBOutlet UIImageView *backgroundImageView;
#property(nonatomic, strong) UIImage *backgroundImage;
#end
#implementation ProfileViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self.backgroundImageView
setImage:self.backgroundImage];
}
#end
About the blur effect, I advice you to use FXBlurView in your ProfileViewController :
https://github.com/nicklockwood/FXBlurView