title: How to add constraints programatically to place a label at the left bottom of the screen?
body: <p>I want to place a label at the bottom left of the screen: So I added the following code:</p>
  
  <pre><code>    UILabel *versionLabel = [UILabel new];
    versionLabel.text = @"some text";
    versionLabel.textColor = [UIColor whiteColor];
    versionLabel.font = [UIFont systemFontOfSize:10.0];
    [self.view addSubview:versionLabel];
      [versionLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
  
      NSDictionary *views = NSDictionaryOfVariableBindings(versionLabel);
  
  
      [self.view addConstraints:[NSLayoutConstraint
                                 constraintsWithVisualFormat:@"H:|-3-[versionLabel]"
                                 options:0
                                 metrics:nil
                                 views:views]];
      [self.view addConstraints:[NSLayoutConstraint
                                 constraintsWithVisualFormat:@"V:[versionLabel]-3-|"
                                 options:0
                                 metrics:nil
                                 views:views]];
  </code></pre>
  
  <p>My issue is that the label ends up at the top left always. No way to move it at the bottom when I add constraints.</p>