导航栏没有出现? [英] Navigation bar not appearing?

问题描述

我目前正在使用一个名为的表单构建库Eureka(

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解决方案

您正在像这样显示ViewController:

 让vc =情节提要！.instantiateViewControllerWithIdentifier("TutorSignUp")为！SignUpViewControllerself.presentViewController(vc，动画:true，完成:无) 

因此您的 SignUpViewController 实际上没有父代 UINavigationController .

这将解决以下问题:

 让vc =情节提要！.instantiateViewControllerWithIdentifier("TutorSignUp")为！SignUpViewController让navigationController = UINavigationController(rootViewController:vc)self.presentViewController(navigationController，动画:true，完成:无) 

I am currently using a form building library called Eureka(https://github.com/xmartlabs/Eureka) and for some reason whenever I build a form,the navigation bar is not appearing eventhough my view controller is embedded in a navigation controller and it is set to visible.Any help? Here's my repo: https://github.com/ariff20/iTutor

Code

class SignUpViewController: FormViewController ,UINavigationBarDelegate{


override func viewDidLoad() {
    super.viewDidLoad()

     let logButton : UIBarButtonItem = UIBarButtonItem(title: "RightButtonTitle", style: UIBarButtonItemStyle.Done, target: self,action: "multipleSelectorDone")

    self.navigationController?.navigationBar.hidden = false

    self.navigationItem.rightBarButtonItem = logButton
     form +++ Section("Your Basic Details")
        <<< NameRow()
            {
                $0.placeholder = "Your Name"
            }
        <<< EmailRow()
            {
                $0.placeholder = "Email"
            }
        <<< PasswordRow()
            {
                $0.placeholder = "Password"
            }
        <<< PhoneRow()
            {
                $0.placeholder = "Your phone no,Customers will see this"
            }

        +++ Section("Select your Expertise")
        <<< MultipleSelectorRow<String>
            {
                $0.title = "Choose your Subjects"
                $0.options = ["English","Mandarin","Maths","Science","Bahasa Malaysia"]

            }
            .onPresent { from, to in
                to.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Done, target: from, action:"multipleSelectorDone:")
        }
        <<< MultipleSelectorRow<String>
            {
                $0.title = "Choose your levels"
                $0.options = ["Standard 1-3","Standard 4-6","Form 1-3","Form 4-5"]

            }
            .onPresent { from, to in
                to.navigationItem.rightBarButtonItem = logButton}

        <<< MultipleSelectorRow<String>
            {
                $0.title = "Choose your pricing range"
                $0.options = ["RM30-RM40","RM40-RM60","RM60-RM80","RM80-RM100"]
            }
            .onPresent { from, to in
                to.navigationItem.rightBarButtonItem = logButton}
        +++ Section("Where can you teach?")
        <<< TextRow()
            {
                $0.placeholder = "State"
            }
        <<< TextRow()
            {
                $0.placeholder = "Town,ex:Near Shah Alam"
            }


    }
override func viewWillAppear(animated: Bool)
{
    super.viewWillAppear(true)
    self.navigationController?.navigationBarHidden=false

}

func multipleSelectorDone(item:UIBarButtonItem)
{

    navigationController?.popViewControllerAnimated(true)
}

OUTPUT

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解决方案

You're presenting your ViewController like this:

let vc = storyboard!.instantiateViewControllerWithIdentifier("TutorSignUp") as! SignUpViewController
self.presentViewController(vc, animated: true, completion: nil)

so your SignUpViewController doesn't actually have a UINavigationController as a parent.

This will fix that:

let vc = storyboard!.instantiateViewControllerWithIdentifier("TutorSignUp") as! SignUpViewController
let navigationController = UINavigationController(rootViewController: vc)
self.presentViewController(navigationController, animated: true, completion: nil)

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