Why the second "if" is not working? - ios

Question

I am trying to populate a view and I am writing the code of this view. The code:
class DetailViewController: UIViewController, UIScrollViewDelegate {
#IBOutlet weak var tituloView: UILabel!
#IBOutlet weak var scrollView: UIScrollView!
var txtTitulo: String?
var txt1: String?
var imageView: UIImageView?
var img1: String?
var txt2: String?
var texto2: String?
var imageView2: UIImageView?
var img2: String?
var txt3: String?
var img3: String?
var txt4: String?
var img4: String?
var arrayHeights: [Int] = []
override func viewDidLoad() {
super.viewDidLoad()
tituloView.text = txtTitulo
tituloView.textAlignment = .Center
tituloView.font = UIFont(name: "HelveticaNeue-UltraLight", size: 40)
scrollView.zoomScale = 1
var paragraphStyle1 = NSMutableParagraphStyle()
paragraphStyle1.alignment = NSTextAlignment.Justified
var attributedString1 = NSAttributedString(string: txt1!,
attributes: [
NSParagraphStyleAttributeName: paragraphStyle1,
NSBaselineOffsetAttributeName: NSNumber(float: 0)
])
let texto1 = UILabel(frame: CGRectMake(154, -55, 697, 200))
texto1.attributedText = attributedString1
texto1.numberOfLines = 0
texto1.font = UIFont(name: "HelveticaNeue-UltraLight", size: 28)
texto1.lineBreakMode = .ByWordWrapping
texto1.sizeToFit()
scrollView.addSubview(texto1)
let imagem = UIImage(named: img1!)
let imageView = UIImageView(image: imagem)
imageView.frame = CGRect(x: 320, y: texto1.frame.size.height, width: 400, height: 250)
imageView.contentMode = .ScaleAspectFit
scrollView.addSubview(imageView)
if (txt2 != nil) {
var paragraphStyle2 = NSMutableParagraphStyle()
paragraphStyle2.alignment = NSTextAlignment.Justified
var attributedString2 = NSAttributedString(string: txt2!,
attributes: [
NSParagraphStyleAttributeName: paragraphStyle2,
NSBaselineOffsetAttributeName: NSNumber(float: 0)
])
let texto2 = UILabel(frame: CGRectMake(164, imageView.frame.origin.y + imageView.frame.size.height + 20, 697, 200))
texto2.attributedText = attributedString2
texto2.numberOfLines = 0
texto2.font = UIFont(name: "HelveticaNeue-UltraLight", size: 28)
texto2.lineBreakMode = .ByWordWrapping
texto2.sizeToFit()
scrollView.contentSize = CGSizeMake(texto1.frame.size.width, texto1.frame.size.height + imageView.frame.size.height + texto2.frame.size.height + 20)
scrollView.addSubview(texto2)
if (img2 != nil) {
let imagem2 = UIImage(named: img2!)
let imageView2 = UIImageView(image: imagem2)
imageView2.frame = CGRect(x: 320, y: texto2.frame.origin.y + texto2.frame.size.height, width: 400, height: 250)
imageView2.contentMode = .ScaleAspectFit
scrollView.contentSize = CGSizeMake(texto1.frame.size.width, texto1.frame.size.height + imageView.frame.size.height + imageView2.frame.size.height + texto2.frame.size.height + 20)
scrollView.addSubview(imageView2)
} else {
scrollView.contentSize = CGSizeMake(texto1.frame.size.width, texto1.frame.size.height + imageView.frame.size.height)
}
}
scrollView.scrollEnabled = true
}
}
The problem is: if the img2 is nil, this code is not executed and my scrollView is not set properly:
var paragraphStyle2 = NSMutableParagraphStyle()
paragraphStyle2.alignment = NSTextAlignment.Justified
var attributedString2 = NSAttributedString(string: txt2!,
attributes: [
NSParagraphStyleAttributeName: paragraphStyle2,
NSBaselineOffsetAttributeName: NSNumber(float: 0)
])
let texto2 = UILabel(frame: CGRectMake(164, imageView.frame.origin.y + imageView.frame.size.height + 20, 697, 200))
texto2.attributedText = attributedString2
texto2.numberOfLines = 0
texto2.font = UIFont(name: "HelveticaNeue-UltraLight", size: 28)
texto2.lineBreakMode = .ByWordWrapping
texto2.sizeToFit()
scrollView.contentSize = CGSizeMake(texto1.frame.size.width, texto1.frame.size.height + imageView.frame.size.height + texto2.frame.size.height + 20)
scrollView.addSubview(texto2)
Why is this happening? If I img2 is not nil, the code runs with no problems. I added a println to see if the code inside the if statements were executed, and it was.
All infos (txtTitulo, txt1, imageView, txt2....) are being sent by another View Controller through a segue.
This view, the DetailViewController was created in StoryBoard with a label and a scrollView, the rest was added programmatically as you can see here.
I am sorry if this problem might seem too easy, but this is my first iOS app. Thanks for answering!

Answer 1

In a comment, you said:
The problem here is that when this happens, I mean, when the img2 is
nil, the
scrollView.contentSize = CGSizeMake(texto1.frame.size.width,
texto1.frame.size.height + imageView.frame.size.height +
texto2.frame.size.height + 20)
never gets executed. See what I am saying?
That code is not being executed because you told it not to. You have an if statement that says if img2 != nil and then a block of code that is only run if img2 != nil. Now you're asking why that code isn't executed when img2 == nil?
The answer is "Because that's how if statements work."