When I scroll on my UITableView, an empty header appears at the top of the view that prevents the user to see some information properly as you can see in the following screenshot:
How can I remove this?
It is actually a UINavigationBar that you're seeing. Try this in your UIViewController to hide the navigation bar:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationController?.setNavigationBarHidden(true, animated: animated)
}
If the navigation bar is used in previous view controllers in your navigation stack, make sure to make it visible there again.
Related
I am adding a button using the storyboard as below screenshot:
While presenting from 1st controller to 2nd controller, navigation bar button alignment is not displaying properly.
I don't know whether it's iOS 13 problem or what.
To fix this issue, you need to call setNeedLayout manually in the viewWillAppear method as mentioned below:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if #available(iOS 13.0, *) {
navigationController?.navigationBar.setNeedsLayout()
}
}
I have weird situation and have no clue how to debug it. I load three viewControllers in navigation controller. When Im navigating back from there second and first ViewController doesn't display anything just white screen I added print methods everywhere in lifecycle methods and it seems that it loads views but anyway they not visible. What could be the problem?
Yep It's weird, There maybe some code which do something with your view on such events like:
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
// remove some subviews or change constraints.
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
// remove some subviews or change constraints.
}
Please send us a code of the view controller which has the problems and code how exactly you show the controller.
Is there a way to show navigation view on one view and not show it on another at the same time?
The problem: I have two view controllers - table and description view (called on cell click).
Table got a navigation bar, while description view - don't have it.
Table view:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.navigationController?.isNavigationBarHidden = false
}
Description view controller:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.isNavigationBarHidden = true
}
Everything works fine, but when i swipe for half screen back to table (keeping finger on screen, watching both views) - i don't see navigation bar (which works as expected with that code), and when i release finger - whole table view jumps, because nav bar is shown.
Is there a way to keep not seeing nav bar in description view and see it all the time in table view?
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.navigationController?.setNavigationBarHidden(false, animated: true)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: true)
}
You can hide the navigation bar while doing the segue (earlier). If you're doing it programmatically:
yourVCToBePushed.navigationController?.isNavigationBarHidden = true
If you're doing it in the storyboard, do similarly inside prepareForSegue:
let yourVCToBePushed = segue.destination as! YourVCToBePushed (type)
yourVCToBePushed.navigationController?.isNavigationBarHidden = true
You can also create your own "navigationView" inside tableView header, and add buttons there.
I'am working on an app, which is embedded in a UINavigationController. I like Storyboard, so I am looking for a solution that could be done in Storyboard. If that's not possible, I am doing it programmatically.
I want different settings for the top- and toolbar (hide/ show). See the image below.
Now look at situation two. I want the third ViewController to have no topbar. But if I set it to "none", four and five have no topbar as well. See image:
What I want is only the third controller not to have a topbar.
How is this possible in Storyboard?
Thanks!
Niels
In your viewWillAppear() of your third ViewController add this simple line of code -
self.navigationController?.isNavigationBarHidden = true
From Storyboard -
Click on that specific ViewController where you don't want to show the bar then go to Attributes inspector. There is a drop down labeled Top Bar change this drop down to none
And for the smooth animation -
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// Hide the navigation bar on the this view controller
self.navigationController?.setNavigationBarHidden(true, animated: animated)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
// Show the navigation bar on other view controllers
self.navigationController?.setNavigationBarHidden(false, animated: animated)
}
I thought showing a screenshot would help understand the issue a bit better.
So the context is the following:
I'm in a navigation controller, on the settings screen of the app (which has a navigation item) and when we tap on the back button, we go back to the main screen of the app (for which I've hidden the navigation bar in the viewWillAppear of the main screen because I'm building a custom header view myself).
At soon as I tap on the back button, the navigation bar disappears immediately and I see a black rectangle appears instead until the animation to display the main screen is completed.
Do you know how I can avoid having this black rectangle appear?
Hope the questions makes sense.
Screenshots
Here is the initial settings screen:
When we tape on the back button, this happens... help :D
I know this piece of code is most likely responsible for the error, but I absolutely need to have the navigationBar hidden on the previous screen.
override func viewWillAppear(_ animated: Bool) {
navigationController?.isNavigationBarHidden = true
}
Have you tried the animated method of hiding the navigation bar setNavigationBarHidden(_ hidden: Bool, animated: Bool)?
For Swift3.0
Add below code in First ViewController
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
navigationController?.setNavigationBarHidden(true, animated: animated)
}
Add below code in Second ViewController
func backButtonPressed() {
navigationController?.setNavigationBarHidden(false, animated: false)
navigationController?.popViewController(animated: true)
}
Add below code in Second ViewController
the color can corresponding your custom
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.view.backgroundColor = UIColor.white
}