How to push UIView to the bottom of parent view using NSLayoutConstraint?

Question

iOS

There is a UIView (blue in the picture) with a fixed height of 45px, you need to press it to the bottom using autolayout (NSLayoutConstraint).
It turned out to press UIButton in this way, but it is not clear how to do it with view.
ps is interested in the implementation of the code without InterfaceBulder
Tried like this:

CGRect frame = CGRectMake(0, 500, self.view.frame.size.width, 45);
UIView *bottom = ;

Answer 1

I prefer to use Visual Format Language

    NSArray *verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[view(height)]-|"
                                                                           options:0
                                                                           metrics:@{
                                                                               @"height" : @(50)
                                                                           }
                                                                             views:@{
                                                                                 @"view" : view
                                                                             }];

    NSArray *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[view]-0-|"
                                                                             options:0
                                                                             metrics:nil
                                                                               views:@{
                                                                                   @"view" : view
                                                                               }];
    [self.view addConstraints:verticalConstraints];
    [self.view addConstraints:horizontalConstraints];