In my app, I have a similar view like Instagram reels where video plays and at bottom there is profile picture, description of video, like button and comments button.
When I click comments button, I would like to show comments table view controller covering upto half screen, with comments and inputbar accessoryview at bottom like below:
half screen view controller
When I click inside inputbar accessoryview, the comments view controller show cover fullscreen and should show keyboard like below:
full screen view controller
Please advise me on how to achieve this behaviour.
You could create a new ViewController in storyboard or code, then set the set self.view.backgroundColor = .clear (alternatively, you could change the Opacity of the backgroundColor of the view in storyboard by using a custom color).
Next, place a UIView on the storyboard. Create an #IBOutlet for the height constraint of the view. You can get the height of the view (the ViewController's UIView, not the one you just placed) by using
let viewHeight = self.view.frame.size.height
self.commentsView.setHeight(viewHeight/2)
Make sure to include this extension in your project for setHeight:
extension UIView {
func setHeight(_ h:CGFloat, animateTime:TimeInterval?=nil) {
if let c = self.constraints.first(where: { $0.firstAttribute == .height &&
$0.relation == .equal }) {
c.constant = CGFloat(h)
if let animateTime = animateTime {
UIView.animate(withDuration: animateTime, animations:{
self.superview?.layoutIfNeeded()
})
}
else {
self.superview?.layoutIfNeeded()
}
}
}
}
Related
I'm using UIStackView and it contains 3 UIView instances, which has fixed height
I'm trying to hide these subviews by clicking button
first and second view show/hide well with proper animation
but last view doesn't animate
class ViewController: UIViewController {
private var flag: Bool = true
#IBOutlet weak var targetView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func buttonDidTapped(_ sender: Any) {
flag = !flag
UIView.animate(withDuration: 0.5) {
self.view.layoutIfNeeded()
self.targetView.isHidden = !self.flag
}
}
}
The issue is the way stack views change their frames when hiding an arranged subview.
Easiest way to see what's happening:
set your Green view to Alpha: 0.5
toggle .isHidden on the Blue view
You'll see that the 50% translucent Green view "slides up over" the Blue view... the Blue view does not "shrink in height" during the animation.
To solve your specific issue, set Clips To Bounds to true on your stack view. Now, when you toggle .isHidden on your Green view, the animation will look correct.
That will not change the "slide over" appearance if you have translucent views, but that's a different issue.
As a side note, you can simplify your code and get rid of the flag like this:
UIView.animate(withDuration: 0.5) {
// not needed
//self.view.layoutIfNeeded()
self.targetView.isHidden.toggle()
}
Try change your code from:
UIView.animate(withDuration: 0.5) {
self.view.layoutIfNeeded()
self.targetView.isHidden = !self.flag
}
to:
self.targetView.isHidden = !self.flag
UIView.animate(withDuration: 0.5) {
self.view.layoutIfNeeded()
}
Looks like you animate before change.
I have a UIViewController that has tab bar controller at bottom. When user click on a button I m hiding the tab bar. Tab bar is getting hidden but there is a white space at bottom. ViewController frame is not changing. How to manage this ? If tabor controller gets hidden, viewController height should get increase.
func apply(_ effect: ActivityFeedEffect) {
switch effect {
case .feedTypeChange(mode: let mode):
self.parent?.tabBarController?.tabBar.isHidden = mode == .hidden
}
}
This is an extension on UITabBarController, which you can use.
This basically, updates the frames of the view.
You can add animation and other frame handling if needed, based on your use case. But this is something that can lead you in that direction.
extension UITabBarController {
func hideTabBar(isHidden:Bool) {
if (isTabBarAlreadyHidden() == isHidden) { return }
let frame = self.tabBar.frame
let height = frame.size.height
let offsetY = (isHidden ? -height : height)
self.tabBar.frame.offsetBy(dx:0, dy:offsetY)
self.view.frame = CGRect(x:0,y:0,width: self.view.frame.width, height: self.view.frame.height + offsetY)
self.view.setNeedsDisplay()
self.view.layoutIfNeeded()
}
func isTabBarAlreadyHidden() ->Bool {
return self.tabBar.frame.origin.y < UIScreen.main.bounds.height
}
}
In my case, I have configured on the storyboard the extended Edges to go under bottom bars and under opaque bars (see image). So My view always takes the hole screen, and I don't need to adjust the frame. Maybe this helps.
My structure is Tab bar -> Navigation Controller -> TableView (here I hide/show the tab bar)
I have a "classic app" with 3 ViewController and a tabBar that I use to change ViewController.
On my first ViewController, I have a button that display a UIView on all the screen, so I hide tabBar with this setTabBarVisible func :
extension UIViewController
{
func setTabBarVisible(visible: Bool, animated: Bool)
{
//* This cannot be called before viewDidLayoutSubviews(), because the frame is not set before this time
// bail if the current state matches the desired state
if (isTabBarVisible == visible) { return }
// get a frame calculation ready
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
let offsetY = (visible ? -height! : height)
// zero duration means no animation
let duration: TimeInterval = (animated ? 0.3 : 0.0)
// animate the tabBar
if frame != nil
{
UIView.animate(withDuration: duration)
{
self.tabBarController?.tabBar.frame = frame!.offsetBy(dx: 0, dy: offsetY!)
return
}
}
}
var isTabBarVisible: Bool
{
return (self.tabBarController?.tabBar.frame.origin.y ?? 0) < self.view.frame.maxY
}
}
That's working, the tabBar is hidden and I see all my UIVIew.
The problem is, I have a UILabel at bottom of the UIView (at the place I usually display the tabBar), and I can't use my TapGesture on my UILabel, nothing is happening.
(if I display the label somewhere else the UITapGesture works good.)
I tried to set zPosition of my tabBar to 0 and zPosition of my UIView to 1 but that's doesn't work either.
How can I get my label clickable at bottom of my view?
Check UILabel.isUserInterration = enable
Make sure that when you hide tabbar, perticular view controller Under bottom bar property is unselect . See atteh imnage.
You can try with programatically also like
ViewController.edgesForExtendedLayout = UIRectEdge.top
make sure is true
label.isUserInteractionEnabled = true
Please refer this link may it help you.
So this is what I am trying to do:
Here is the initial screen:
When the bottom pointing arrow is clicked there is a smaller view that transitions from bottom to top like this:
And as you can see the view in the back is dimmed. And when I click on the back view, the smaller sized view goes away by animating downwards.
There were several things that I tried:
1. I tried to segue modally which seemed to animate properly, namely, from bottom to top, but it covers the entire back view.
2. I tried to make the modal view only half the parent size by trying to replicate this post: Present modal view controller in half size parent controller. However, it did not work.
3. So I decided to put a UIView on top of my back view like so:
And I connected the grey colored view with the #IBOutlet weak var messageView: UIView!. And I tried using this code: UIView.transitionWithView(messageView, duration: 1.0, options: UIViewAnimationOptions.CurveEaseIn, animations: nil, completion: nil). However, nothing seems to be happening. Any suggestions on how to accomplish this?
For the Animation of button:
Add autolayout constraint to the BottomLayout Guide.And create an IBOutlet as
#IBOutlet weak var bottomConstraint: NSLayoutConstraint!
var shouldAnimateView:Bool = true
On the Action of the button you need to animate the View using constraint
#IBAction func showOrHideViewBtn(sender: AnyObject) {
if shouldAnimateView {
self.bottomConstraint.constant = self.view.frame.size.height/2+5
UIView.animateWithDuration(Double(0.2), animations: {
self.bottomConstraint.constant = self.view.frame.size.height/2 - self.toanimateView.frame.size.height
self.view.layoutIfNeeded()
})
}else{
self.bottomConstraint.constant = self.view.frame.size.height/2 - self.toanimateView.frame.size.height
UIView.animateWithDuration(Double(0.2), animations: {
self.bottomConstraint.constant = self.view.frame.size.height/2+5
self.view.layoutIfNeeded()
})
}
shouldAnimateView = !shouldAnimateView
}
I am trying to add a button ontop of a uitableview controller table view. The view controller has a navigation controller and static cells, which is why it is a uitableviewcontroller and not a uiviewcontroller. Now I am trying to add a button at the bottom of the screen that is attached to the navigation controller so that it doesn't scroll with the table view.
I am trying to make something similar to what is below. It has a navigation controller for the top bar, a table view with static cells and then a button, but how did they do the button?
Image: http://postimg.org/image/ilsmqqrip/
Thanks!
UPDATE: How can I use a uiviewcontroller with a tableview with static cells using Swift?
I find Container Views very useful in this scenario! A clean solution and very easy to implement.
Just create a normal UIViewController, add your button and a ContainerView as subviews of this UIViewController (the middle one in the image below). Finally create Embed Segue from ContainerView to your UITableViewController (the one on the right).
This way you can use static cell prototypes, not being limited only to UITableView at the same time.
Result:
there is a better solution for this. you can do this by disabling the Auto Layout(button.translatesAutoresizingMaskIntoConstraints = false) property of the corresponding Button or any UIView for floating button:
Swift 4
//create a button or any UIView and add to subview
let button=UIButton.init(type: .system)
button.setTitle("NEXT", for: .normal)
button.frame.size = CGSize(width: 100, height: 50)
self.view.addSubview(button)
//set constrains
button.translatesAutoresizingMaskIntoConstraints = false
if #available(iOS 11.0, *) {
button.rightAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.rightAnchor, constant: -10).isActive = true
button.bottomAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.bottomAnchor, constant: -10).isActive = true
} else {
button.rightAnchor.constraint(equalTo: tableView.layoutMarginsGuide.rightAnchor, constant: 0).isActive = true
button.bottomAnchor.constraint(equalTo: tableView.layoutMarginsGuide.bottomAnchor, constant: -10).isActive = true
}
I did something similar with UITableViewController and a static datasource. I added the button in the footerview of my tableview.
To make it align to the bottom of the screen i needed this code in my viewcontroller:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
// Make footerview so it fill up size of the screen
// The button is aligned to bottom of the footerview
// using autolayout constraints
self.tableView.tableFooterView = nil
self.footerView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.tableView.frame.size.height - self.tableView.contentSize.height - self.footerView.frame.size.height)
self.tableView.tableFooterView = self.footerView
}
In short, I resize the footerview to take up all the remaining space after the contentsize of the table view is removed. Since the button is aligned to the bottom of the footerView with autolayout, it will stay in the bottom of the screen.
The Storyboard:
Here is the result:
The UITableViewController will take up the whole space, so you won't be able to add the button. Refactor your UITableViewController based code into UIViewController with UITableView manually added. This way you will be able to set the size of your table view and put the button to the bottom.
Unfortunately UITableViewController has a tableView as its top level view. Of course if you look in the view debugger you can see that the tableview is not the root view. Therefore you can add the buttons to the tableView's window programatically. If you have to do it after the fact, this is probably the easiest way to add a top level element over a UITableViewController. Otherwise if you are doing it in the initial design, you can use container view for your buttons and a UITableViewController for the TableView. The downside of this approach is you end up with two view controllers, one for the container and one for the table and its often necessary to pass information back and for between them. If you are using swift you can simplify this by nesting the tableViewcontroller inside the container view controller class.
If you want to add a button to the window, you can do this lazily once you are sure that the view has a window. Note that the buttons belong to the window and not to the view controller, so its your responsibility to remove them when the view controller disappears.
private weak var button: UIButton!
...
override func didMove(toParentViewController parent: UIViewController?) {
super.didMove(toParentViewController: parent)
guard self.button == nil, let window = tableView.window else {
return
}
let button = UIButton(frame: CGRect(x:0, y:40, width: 200, height: 20))
button.setTitle("This is a red button", for: .normal)
button.backgroundColor = UIColor.red
window.addSubview(button)
self.button = button
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
button?.removeFromSuperview()
}
Step 1 :-
Drag and drop one uiview to UITable View Controller (Static)
Automatically it sticks to the bottom.
If you need to, you can also add two buttons inside UIView... It depends on your requirements.
Step 2 :-
Connect the outlet for uiview (outletView)
Step 3 :-
Add this below code in View Will Appear.
override func viewWillAppear(_ animated: Bool) {
outletViewBottom.backgroundColor = .red
tableView.addSubview(outletViewBottom)
// set position
outletView.translatesAutoresizingMaskIntoConstraints = false
outletView.leftAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.leftAnchor).isActive = true
outletView.rightAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.rightAnchor).isActive = true
outletView.bottomAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.bottomAnchor).isActive = true
outletView.widthAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.widthAnchor).isActive = true
outletView.heightAnchor.constraint(equalToConstant: 50).isActive = true // specify the height of the view
}
Step 4 :-
Now run the code... Happy coding.
all you need to do is to add your Top view whichever it is to the navigationController.view like so:
self.navigationController?.view.addSubview(YOUR_TOP_VIEW)
so if you need a sticky button/view etc... on top of TableViewController which does not scroll with tableView, use this approach.
Here is a UIViewController, with a UITableView added as a subview. At the top right, you can see a dropdown that says Content: Dynamic Prototypes. Change it to Static Cells.