title: Add views in UIStackView programmatically
body: <p>I'm trying to add views in UIStackView programmatically. 
  For now My code is:</p>
  
  <pre><code>UIView *view1 = [[UIView alloc]init];
  view1.backgroundColor = [UIColor blackColor];
  [view1 setFrame:CGRectMake(0, 0, 100, 100)];
  
  UIView *view2 =  [[UIView alloc]init];
  view2.backgroundColor = [UIColor greenColor];
  [view2 setFrame:CGRectMake(0, 100, 100, 100)];
  
  [self.stack1 addArrangedSubview:view1];
  [self.stack1 addArrangedSubview:view2];
  </code></pre>
  
  <p>When i deploy the app, there is only 1 view and it is with black colour.(view1 get the parameters for view2 too)</p>