I am adding a UIView to a container view programmatically, (the container view however is created in storyboard). Here is the code:
class ViewController: UIViewController{
#IBOutlet weak var dwView: UIView!
private var dwSelector = dwSelectorView()
override func viewDidLoad(){
super.viewDidLoad()
addDWSelector()
}
func addDWSelector(){
dwSelector.setTranslatesAutoresizingMaskIntoConstraints(false)
dwSelector.frame = CGRectMake(self.dwView.bounds.origin.x, self.dwView.bounds.origin.y, self.dwView.bounds.width / 2.0, self.dwView.frame.height)
println("dw height: \(self.dwView.frame.height)")
//prints 568, way too large of a value
self.dwView.addSubview(dwSelector)
}
}
The heigh of dwView is 123 in storyboard but the print state printed 568 and so now this is what it looks like:
You should always not rely on -(void)viewDidLoad since view bounds is incorrect at this point or - (void)viewWillAppear if you are using auto layout to set your view's frame. If you layout view in UIViewController, viewDidLayoutSubviews() is a appropriate place, if you layout subviews in UIView, it is layoutSubviews().
Check this article to get more details:Where to progmatically lay out views in iOS 5 (and handling orientation changes)
have you tried to call addDWSelector() in viewWillAppear()?
Related
I have a ViewController and a container view testcontrollerViewController inside of it. I noticed that after I'm adding constraints to that container view in the storyboard (all the edges match the safe area) its width decreases a little bit, but if I remove constraints width changes back to normal. (Switches from 724px to 712px and back)
Is it a bug or am I doing something wrong?
I print container view width in its viewDidAppear function.
class testcontrollerViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
view.backgroundColor = .red
print("container vc load \(testview.frame.width)")
}
override func viewDidAppear(_ animated: Bool) {
print("container vc appear \(testview.frame.width)")
print("container view safe area insets \(view.safeAreaInsets)")
}
#IBOutlet var testview: UIView!
In my opinion, I think because there is a gap between the superview and safearea. When you constraints the container view it relates to the safearea only - I think that is the reason the width changed above.
In my case, I have to add UIView in top of the Tableview but it should be inside Tableview because of scrolling. Here, I drag and dropped UIView on topside tableview. Now, some scenario I need to increase and reduce height of the UIView. I tried to add constraints but its not available. How to achieve this by codebase?
Tableview with UIView Storyboard Hierarchy
Storyboard Design
Disabled Constraints For UIView
Constraints is not working with table header view. you can set table header using custom view and update its frame
Set a custom view
Set table header and update it's frame
class ViewController: UIViewController {
#IBOutlet var tableView: UITableView!
#IBOutlet var tableHeader: UIView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
loadHeader()
}
func loadHeader() {
tableHeader.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 300)
tableView.tableHeaderView = tableHeader
}
}
I want to add a few view in scrollview. But I dont want to this view programmatically. I want to create with storyboard. This view include an image. I added scrollview and added to view. But in scrollview I just showing my last view. I want to 2 view and 2 image like my view. How can i fix this?
This is my code:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var mainScrollView: UIScrollView!
var imageArray = [UIImage]()
#IBOutlet weak var myView: UIView!
#IBOutlet weak var imgv: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageArray = ["image","image2"]
for i in 0..<imageArray.count{
mainScrollView.contentSize.width = mainScrollView.frame.width * CGFloat(i + 1)
myView.layer.frame.size.width = myView.frame.width * CGFloat(i + 1)
imgv.image = imageArray[i]
mainScrollView.addSubview(myView)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
This is storyboard and controller looks like
You are having an issue with constraints from what I see and that is why you might not see every element that you put on your storyboard. You need to correct those errors for everything to show up correctly in your scrollview. Keep in mind, you need to tell the scrollview what its height and width should be in the storyboard. They need to be defined in some way. This is a common mistake when working with scrollviews.
You can put a view in your scrollview and define its height and width property. You can set its width to be equal to the screen's width and you can set a constant for your height.
I setup a view controller scene with interface builder. I add a view to my controller and add a custom class (CustomView) to it.
The view controller code
class ViewController: UIViewController {
#IBOutlet var myCustomView: CustomView!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(animated: Bool) {
print(myCustomView.frame.origin)
}
}
The question
Why the origin of myCustomView is equal to (-4.0, 64.0) and not (0, 64) ?
when you add the constraints,your constraints to margin remains unchecked. Because of constraints to margin it gives you a frame that starts with (-4.0,64.0) like that...
Try to pinned all your edges without constraints to margin that will solve your problem ..
For more guide about constraints to margin, check this link
I'm trying to set up a view inside a container view. It has to be done this way due to several different controllers for the views inside the swipeView.
#IBOutlet weak var containerView: ContainerView!
override func viewDidLoad() {
super.viewDidLoad()
//Some other stuff
//Create new swipeView
var swipeView = MDCSwipeToChooseView(frame: containerView.frame, options: options)
//Add the view from the controller to the swipeView
swipeView.addSubview(containerViewController.view)
//Add the swipeView to the main view
self.view.addSubview(swipeView)
I end up with this
The white area is the view that should inherit containerView's size. The containerView is the pink one in the background and it's shown properly. I have noticed that containerView.frame returns the size of the component from the storyboard, see pic 2. The frame obtained by calling on the containerView.frame is the one before the view is resized to meet all constrains. How do i get the proper values?
Placing the same code inside viewDidLayoutSubviews() instead of viewDidLoad() solved the issue.