How to set auto-layout constraints programmatically?

Question

Objective-C

Good afternoon!
I need to superimpose a 250x127 picture on top of everything in the Navigation Controller so that it is always located in the upper right corner.
I'm trying like this:

UIImageView *soldImageView = ;
    [self.navigationController.view addSubview:soldImageView];
    [self.navigationController.view bringSubviewToFront:soldImageView];
    [self.navigationController.view addConstraint:[NSLayoutConstraint constraintWithItem:soldImageView
                                                                               attribute:NSLayoutAttributeTrailing
                                                                               relatedBy:NSLayoutRelationEqual
                                                                                  toItem:self.navigationController.view
                                                                               attribute:NSLayoutAttributeRight
                                                                              multiplier:1.0
                                                                                constant:20.0]];
    [self.navigationController.view addConstraint:[NSLayoutConstraint constraintWithItem:soldImageView
                                                                               attribute:NSLayoutAttributeTop
                                                                               relatedBy:NSLayoutRelationEqual
                                                                                  toItem:self.navigationController.view
                                                                               attribute:NSLayoutAttributeTop
                                                                              multiplier:1.0
                                                                                constant:70.0]];
    [self.navigationController.view addConstraint:[NSLayoutConstraint constraintWithItem:soldImageView
                                                                               attribute:NSLayoutAttributeWidth
                                                                               relatedBy:NSLayoutRelationEqual
                                                                                  toItem:nil
                                                                               attribute:NSLayoutAttributeNotAnAttribute
                                                                              multiplier:1.0
                                                                                constant:250.0]];
    [self.navigationController.view addConstraint:[NSLayoutConstraint constraintWithItem:soldImageView
                                                                               attribute:NSLayoutAttributeHeight
                                                                               relatedBy:NSLayoutRelationEqual
                                                                                  toItem:nil
                                                                               attribute:NSLayoutAttributeNotAnAttribute
                                                                              multiplier:1.0
                                                                                constant:127.0]];

I ask for help, as various variations on the advice from Google do not work.

Answer 1

Found the solution myself:
Not very advanced audience here... only posted here because stackoverflow is read-only.