I am new to Swift, and I am struggling to find a solution: in my UITableViewController, I want to make a Toolbar that I have added to the storyboard fixed or "sticky" to the bottom of the view at all times.
Currently, after dragging a toolbar into the UITableViewController, it does add this toolbar; however, it places the toolbar as the final row of the table.
I want this toolbar to sit above the navigation tab bar at all times, making it fixed or sticky.
I have tried changing the View's content mode (by setting it to Bottom in the Storyboard) but it does not make a change in the UI.
Is there a way to set this programmatically to always show at the bottom and let the table scroll above it?
//create a tool bar and add it in view
let toolbar = UIToolbar()
toolbar.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(toolbar)
Set constraints to toolbar...
//top constraint to toolbar with tableview
self.toolbar.topAnchor.constraint(equalTo: tableview.bottomAnchor).isActive = true
//bottom constraint to toolbar with super view
self.view.bottomAnchor.constraint(equalTo: toolbar.bottomAnchor).isActive = true
//leading constraint to toolbar with super view
self.view.leadingAnchor.constraint(equalTo: toolbar.leadingAnchor).isActive = true
//trailing constraint with toolbar with super view
self.view.trailingAnchor.constraint(equalTo: toolbar.trailingAnchor).isActive = true
Related
So the way I understand navigation bar (navigation item) is that it has three locations you can modify, which is left (leftBarButtomItem), middle (titleView), and right (rightBarButtonItem).
Now what I'm going to achieve is that I want to just add a simple progress bar line at the very bottom of navigation bar, but still inside navigation bar. I want to make this like an extension of navigation bar that I can reuse on other screens. But I want that left, middle, and right "views" are still working like usual. e.g. I don't want that if I change the title view content manually in other view controller, then the line disappears / stops working for that other view controller. So this will feel like an independent overlay added on top of navigation bar as subview, separated from leftBarButtonItem, titleView, and rightBarButtonView, sort to speak.
Is it possible to do that in navigation item?
This is a example of how to add a Image instead of a Title String
fileprivate func setupTitle(){
let logo = UIImage(named: "my_incredible_logo")
let imageView = UIImageView(image:logo)
imageView.contentMode = .scaleAspectFit
self.navigationItem.titleView = imageView
self.navigationController?.navigationBar.prefersLargeTitles = false
}
I have a Navigation Controller and a Collection View under it inside my app. And there is a problem: I use large title inside my Navigation bar, so everything inside is not static. When I scroll the collection view cells, the title (I created it manually using UILabel() to move it as I want inside the navigation bar) and buttons move up and the navigation bar takes form of iOS 10 navigation bar, I mean its height. You can see it here:
The normal state of my Navigation Bar with "Prefer large titles" On:
It happens when I scroll my Collection View, everything goes up:
So the question is simple: how to make the force constant height for the navigation bar? I want it to become fixed even while scrolling. Are there any ideas? Is it possible?
And the second question, if the first is impossible: Another solution for my problem is to make the Navigation Bar with "Prefer large titles" Off bigger. I tried this code:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let height: CGFloat = 50 //whatever height you want to add to the existing height
let bounds = self.navigationController!.navigationBar.bounds
self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 0, width: bounds.width, height: bounds.height + height)
}
but it worked only for large titles. So how can I make the navigation bar bigger?
Yes, you can make it fixed. It will not scroll if the very first view in the view hierarchy is not a CollectionView/TableView (ScrollView).
Using Storyboard/Xib:
Consider the following image where a tableView and button are added in scene. Here the navigation bar will collapse on scroll of tableView because tableView is the very first view in viewController's containerView hierarchy attached to the navigation bar.
Now to make the navigation bar fixed, if we just change the order of tableView and button as below, it will disable the collapsing of navigation bar.
To change the order of the view, you have to click, hold and move up/down.
If you have only CollectionView in this scene then you can add a placeholder view at the top and set its height to zero as below,
Programmatically:
If you are setting up view's programmatically then you just need to add a placeholder view at the top or add tableView/collection after adding other views.
e.g,
self.view.addSubview(UIView(frame: .zero))
self.view.addSubview(tableView) // or collectionView
I'm trying to understand how to change the height of a navigation bar. Whenever I insert one into my app, it is shorter than all the navigation bars used in Apple's stock apps (Messages and Settings for example). I would like it to get to that height because when I try to add a bar button, it conflicts with the status bar. I also read that as a developer you shouldn't change the height of the navigation bar so I'm a bit confused. Finally, I looked at this Stack Overflow page: How can I change height of Navigation Bar Swift 3.
I tried to implement the code...
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let height: CGFloat = 50 //whatever height you want
let bounds = self.navigationController!.navigationBar.bounds
self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 0, width: bounds.width, height: bounds.height + height)
}
...but my app crashed when I did so.
I'm using Xcode 8.2 beta with Swift 3.
I dont think you can change size of navigationBar.
But this is how would i recommend you to do it.
Remove default navigation bar.
Create a view which is similar to a navigation bar like you design add constrains> leading,trailing,top and height for that
view. so basicly pin it to top, left and right with your design's
height.
Add 2 buttons left and right if needed which would look similar to navigation bar. add button constrains> leading, top, bottom and
width for left one and trailing,top, bottom and width right one.
Add a UILabel which would be your navigation bar title., add label constrains leading with left button, trailing with right button, top
and bottom with navigation view you created. Make uilabel text
centered.
Here you go u have your custom navigation bar.
On each controller all u have to do is CMD+C and CMD+V on the other controller add leading,trailing and top constrains.
Hope it helped.
It is possible, and simple, to add an independent navigation bar and have it match the normal navigation bar height and rotation functionality. Here is how to do it (link includes a video):
In Interface Builder:
Add a UINavigationBar to your view, positioned at the Top Layout Guide location.
Set constraints for Leading Space to Container Margin, Trailing Space to Container Margin, and Top Space to Container — all with ‘Relative to margin’ deselected and a Constant value of 0 (zero).
With the Navigation Bar selected, in the Identity Inspector, add a key path called barPosition. Give it a Number type, and a value of 3.
That should be all you need. However, if you’ve completed these steps and your project doesn’t seem to like the key path, then continue as follows:
Remove the barPosition key path from the Navigation Bar’s Identity Inspector.
Add an IBOutlet for the Navigation Bar to your view controller.
Set your view controller to be a UINavigationBarDelegate.
Add the delegate method func position(for bar: UIBarPositioning) -> UIBarPosition to your view controller, and return a value of UIBarPosition.topAttached.
I need to set constraints in uiscrollview in viewcontroller containing navigationbar and tabbar.I have placed a uiview(contentView) inside scrollview which is of same height as of scrollview.These are the things which I have set curently,
set 4 constraints for scrollview(top,bottom,left,right) with
constraints to margin unchecked which is 0 for all edges.
set 4 constraints for uiview(contentView) inside
scrollview(top,bottom,left,right) with constraints to margin
unchecked which is 0 for all edges.
set equal width and equal height
for scrollview and UIView(contentView)
output is displaying like this uiview(contentView) gets placed lower about 64 px (approx).This view should not place like this.Can anyone help me to solve this.
Here is the project demo which I have worked and can be downloaded here
Select the scene and in the attributes inspector, uncheck: "Under Top Bars" and "Under Bottom Bars".
Then in the storyboard make the scroll view start at the very top of the View Controller, where the navigation bar starts, and then the UIView, where the navigation Bar ends.
Later, select the Scroll View and set the constraints as they come by default.
I guess it's not the cleanest way to do it but I had the same issue and worked for me.
You might try self.automaticallyAdjustsScrollViewInsets = false
The Tab Bar has to be set in the tree UNDER the scrollView, like this:
Try this
override func viewDidLoad() {
self.edgesForExtendedLayout = UIRectEdge()
self.extendedLayoutIncludesOpaqueBars = false
}
I have found the solution for it,The parent ViewController class is set to under top bar and disabling it and changed the frame accordingly in the parent and set the same property and frame to child viewcontroller fixed the issue.
I'm building an application for iOS, which is using a navigation controller. I want to put a view in the titleView, and have it fill the whole width of the navigation bar.
I'm calling setupNavBar in viewDidLoad of the view controller that is embedded in the navigation controller. Here is how I do:
func setupNavBar() {
let navBar = navigationController?.navigationBar
// navBar!.translatesAutoresizingMaskIntoConstraints = false
// navBar!.frame.size.height = CGFloat(100)
let searchBar = UIView(frame: navBar!.frame)
searchBar.bounds = CGRectMake(0, 0, navBar!.frame.width, navBar!.frame.height)
searchBar.backgroundColor = UIColor.brownColor()
navigationItem.titleView = searchBar
}
But the view (brown - "searchBar"), doesn't cover the full navigation bar:
So I figured out that the problem was related to Autoresizing and Constraints, because if I call navBar!.translatesAutoresizingMaskIntoConstraints = false, I can freely set the sizes of views frame, so there must be some constraints that change the view's bounds. But I would like to keep as much of the autolayout behaviour as possible.
Is there a way to only change the contraints on the titleView?
I'm doing everything programmatically, I don't use the storyboard or xib's!
EDIT:
But it doesn't seem like there is any constraints on either navigationItem or navBar:
for someObject in navigationItem.titleView!.constraints {
print(someObject)
}
It doesn't print any constraints. neither if I use navBar.constraints!
EDIT 2:
I have a screenshot from "View UI Hierarchy" from the debug navigator:
It seems that the view(brown) alligns with the Navigation Bar Back Indicator View, maybe this is a clue to what causes the problem?
How come the view is resized?
Two different suggestions here:
1. You can try the
navigationItem.titleView.sizeToFit()
Otherwise you could set the background colour of the navbar to brown as it appears you wish the brown bar to cover the entire width of the navbar. If you want to add other views on top of that you then can.
You could also try to make an outlet to the title view and add an NSLayoutConstraint using
navigationItem.titleView.addConstraint(NSLayoutConstraint: NSLayoutConstraint)
I am not entirely sure whether that will work, however.