Adding progress bar under navigation bar in swift?

Question

Say me please how to add a ProgressView under navigation bar? I try to use solution in this post: adding progress bar under navigation bar, but there code was written on ObjectiveC language... I try to translate to Swift. This is the code, which i added in my NavigationController SubClass

import UIKit
class CustomNavigationController: UINavigationController {

@IBOutlet var Secondprogress: UIProgressView!
override func viewDidLoad() {
    super.viewDidLoad()



    NSLayoutConstraint.deactivateConstraints(self.view.constraints())

    Secondprogress?.setTranslatesAutoresizingMaskIntoConstraints(false)




    var navBar = self.navigationController?.navigationBar
    Secondprogress.tag = 1
    self.view.addSubview(Secondprogress)

    var Constraint = NSLayoutConstraint(item: self.Secondprogress,
        attribute:NSLayoutAttribute.Bottom,
        relatedBy:NSLayoutRelation.Equal,
        toItem:navBar,
        attribute:NSLayoutAttribute.Bottom,
        multiplier:1.0,
        constant:-0.5);

    self.view.addConstraint(Constraint);

    Constraint = NSLayoutConstraint(item: self.Secondprogress,
        attribute:NSLayoutAttribute.Left,
        relatedBy:NSLayoutRelation.Equal,
        toItem:navBar,
        attribute:NSLayoutAttribute.Left,
        multiplier:1.0,
        constant:0);

    self.view.addConstraint(Constraint);

    Constraint = NSLayoutConstraint(item: self.Secondprogress,
        attribute:NSLayoutAttribute.Right,
        relatedBy:NSLayoutRelation.Equal,
        toItem:navBar,
        attribute:NSLayoutAttribute.Right,
        multiplier:1.0,
        constant:0);

    self.view.addConstraint(Constraint);

    Secondprogress.setTranslatesAutoresizingMaskIntoConstraints(false)

    Secondprogress.hidden = false
    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

But when i compile my app, i don't see the ProgressView under Navigation Bar.

Where is my mistake?

Answer 1

My problem was solved.

1. Add the Progress View to View Controller.(Drag and drop)
2. Make a IBOutlet.

3. Write the code:

   override func viewDidLoad() {
   super.viewDidLoad()
   var navBar = self.navigationController?.navigationBar
   var navBarHeight = navBar?.frame.height
   var ProgressFrame = self.Progress.frame
   var pSetX = ProgressFrame.origin.x
   var pSetY = CGFloat(navBarHeight!)
   var pSetWidth = self.view.frame.width
   var pSetHight = ProgressFrame.height
   
   Progress.frame = CGRectMake(pSetX, pSetY, pSetWidth, pSetHight)
   self.navigationController?.navigationBar.addSubview(Progress)
   Progress.setTranslatesAutoresizingMaskIntoConstraints(false)
   
   } 
   

   4.Success!

Answer 2

Have a look at http://www.appcoda.com/webkit-framework-intro/ - below the "Displaying Progress" part.

It's written in Swift, but they use interface builder to create the constraints.