I have 2 UIViewControllers, one starting the GameScene and the other is supposed to show the highscore, as below. The problem is that my second UIViewController does not want to show the udpated highscore. It just keeps on showing 0 all the time.
Does anyone know what the problem is? I tried using viewDidLoad as well as viewWillAppear but none of them work.
override func viewDidLoad() {
super.viewDidLoad()
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 21))
label.center = CGPoint(x: 160, y: 285)
label.textAlignment = .center
label.text = String(GameScene().highScore)
self.view.addSubview(label)
}
in the GameScene, I have declared the highScore as so:
var highScore = Int()
and used in a gameOver function as so:
if score > highScore {highScore = score}
thanks
label.text = String(GameScene().highScore)
This piece of line suggests GameScene is a static class. Un less it is, you simply cannot access variables in such a manner.
You will need to pass data between view controllers to pass data between the scenes. You can pass data using one of three options:
Though performSegue()
performSegueWithIdentifier() and make a connection in IB
make a connection in IB and define an action
Related
I need to create custom button class, reuse it 4 times and I also need to override its text and image name. My next problem is how to set its frame somehow dynamically (now it is static), because I need this 4 buttons in grid 2x2.
I'm trying to create button exactly like this: https://imgur.com/a/dNhUGhc.
I have coded this but it is static and in ViewController I can't edit (override) these labels and image name. And if I tried to reuse this class I would have them in the same spot, because frame settings is exactly the same.
I'm subclassing UIButton. If something more suitable exists just let me know.
Code for adding label
// city label
let cityRect = CGRect(x: 0, y: 20, width: buttonWidth, height: 25)
let cityLabel = UILabel(frame: cityRect)
cityLabel.text = "Label"
cityLabel.font = UIFont.systemFont(ofSize: 17, weight: .semibold)
cityLabel.textAlignment = .center
addSubview(cityLabel)
Code for adding image
// image
let imageView = UIImageView(image: UIImage(named: "something"))
imageView.frame = CGRect(x: 0, y: 60, width: 40, height: 40)
imageView.center.x = self.center.x - 20
addSubview(imageView)
Can you guys help me? Thanks
It looks like what you need to do is use an IBOutlet. Basically, an IBOutlet will give you a reference within your code (custom UIView or UIViewController subclass) to the button that you've setup in xib or storyboard. Then you can make any changes or adjustments that you want to it at runtime.
Check this out to learn more about IBOutlets and how to set them up in your project.
I implemented horizontal(Paging) slide show of views, created separate xib and integrated with the view controller. Slide show is working as expected but I want add action to the every views so that from there I can move directly to the respective main content pages. Find the below code for implementation of slide show.
func createSlides() -> [Slide] {
let slide1:Slide = Bundle.main.loadNibNamed("Slide", owner: self, options: nil)?.first as! Slide
slide1.labelTitle.text = "Page1"
let slide2:Slide = Bundle.main.loadNibNamed("Slide", owner: self, options: nil)?.first as! Slide
slide2.labelTitle.text = "Page2"
return [slide1, slide2]
Slide Function
func setupSlideScrollView(slides : [Slide]) {
scrollView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
scrollView.contentSize = CGSize(width: view.frame.width * CGFloat(slides.count), height: view.frame.height)
scrollView.isPagingEnabled = true
for i in 0 ..< slides.count {
slides[i].frame = CGRect(x: view.frame.width * CGFloat(i), y: 0, width: view.frame.width, height: view.frame.height)
scrollView.addSubview(slides[i])
}
}
Xib file
class Slide: UIView {
#IBOutlet weak var labelTitle: UILabel!
var onClickCallback: (() -> Void)?
override init (frame : CGRect) {
super.init(frame : frame)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
}
If I think what you are asking is right then do this. (BTW I am a bit rusty at this so please don't crucify me if I'm wrong). Also I don't know where you are designing this so I am going to assume it is in a different place to main.viewcontroller. If it isn't just add a button and create a segue to the content page.
Make a public var in createSlides Func and set it to the slide you are on. Eg: Slide 1. When slide two is opened it should update the var two slide two. For the sake of this we will call the var test
Add a button into your design file
Add a #IBAction into the viewcontroller. This #IBAction should be linked with your button.
inside this #IBAction create a segue to the content using the variable we created before. self.performSegue(withIdentifier: test, sender: self)
In the main view controller add two segues from the view with the slidshow to the view controller with the content (Assuming you only have two slides). One segue should be called slide 1 (The same name as the let you created in createSlides func.) The second should be called slide 2 (for obvious reasons.)
Now when your button in slide 1 is pressed it should perform the segue slide 1 and show your main content
Hope I helped, Toby.
Also if this doesn't work, is not what you want to achieve or is badly worded please comment what it is and I will try to fix it.
call this function and pass pageIndex where you want to jump:
func jumpToView(_ index : Int) {
let offset = CGPoint(x: view.frame.width * CGFloat(index), y: 0)
scrollView.setContentOffset(offset, animated: true)
}
Hope this what you are looking.
First line in function let offset = CGPoint(x: view.frame.width * CGFloat(index), y: 0), for calculate position where you want to move in scrollview. E.g : for first xib position will be CGPoint(x:0,y:0) and for 3rd xib, position will be CGPoint(x:200,y:0), consider each xib width is 100
setContentOffset use to scroll at specific location/point.
For more check Link
I have an app with a UIViewController with custom UIViews in it. I want to set a variable in that custom UIView and it doesn't update...
I have done this a thousand times and it always worked but this time it doesn't and I really can't figure out what I'm doing wrong, any help is welcome!
In my viewcontroller:
var sjablonview: sjablonPicker!
sjablonview = sjablonPicker(frame: CGRect(x: btnUndo.frame.origin.x, y: DrawingView.frame.origin.y,
width: (btnX.frame.origin.x + btnX.frame.size.width) - btnUndo.frame.origin.x, height: 250))
sjablonview.alpha = 1
sjablonview.mpUitklapping = 300
self.view.addSubview(sjablonview)
In my custom UIView:
class sjablonPicker: UIView {
var mpUitklapping = CGFloat(100)
override init(frame: CGRect){
super.init(frame: frame)
print(mpUitklapping) // --> output = 100 and not 300
...
You are printing from inside your initialiser. Your view is initialized before you change the value of mpUitklapping. Your initializer gets called from this line:
sjablonview = sjablonPicker(frame: CGRect(x: btnUndo.frame.origin.x, y: DrawingView.frame.origin.y, width: (btnX.frame.origin.x + btnX.frame.size.width) - btnUndo.frame.origin.x, height: 250))
The value gets changed, you just don't print the updated value.
this is a very simple question, but I can't find an answer anywhere. I am trying to display a high score within a CGRect, but cannot figure out exactly how to do it. I am currently trying to do this on a playground so that might have something to do with it. Thanks for the help.
You can make a UILabel in a Swift playground. Here's how it might look:
Here's the code from the playground:
import UIKit
let score = 200
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 300, height: 20))
label.backgroundColor = UIColor.purpleColor()
label.textColor = UIColor.orangeColor()
label.text = "High Score: \(score)"
A CGRect is the frame or dimensions assigned to a UIView, not the UIView itself. I would suggest creating a UILabel and add that to your view. You can set the text on the UILabel to, in your case, the high score variable as a string. Im not sure if it is possible to do this in a playground, but I may be mistaken. A XCode project would work perfect for this, but again, im not sure about the playground.
To do this in a playground, it would look like this:
import UIKit
import XCPlayground
let view = UIView(frame: CGRectMake(0,0,500,500)) //create a view and give it a proper size
let label = UILabel(frame: CGRectMake(0,0,100,23)) //create a label with a size
label.text = "My Label" //give the label some text
view.backgroundColor = UIColor.lightGrayColor() //default view in Playground as black background
view.addSubview(label) //add the label to the view
XCPlaygroundPage.currentPage.liveView = view //tell playgound to display your view as the root view in the assistant editor
You need to open the assistant editor in the playground to see the result (the two circles icon in the upper right corner)
I have UITextView where user types a text. When the keyboard is shown, I add inputView with UIlabel on it. I want this UIlabel to hold character length of the text. It seems very easy task, but unfortunatelly it does not update this word counter UILabel when user change text..
this is how I load the inputView
_textView.inputView = [self inputAccessoryView];
in inputAccessoryView I simply add UILabel as a subview. When keyboard is show, UILabel is also show with inputView. I track changes on
- (void)textViewDidChange:(UITextView *)textView
unfortunatelly the UILabel is never updated (redrawn). When I log in to console its value, the value is correct, so its updating, but the UIlabel is never redrawn and holds the default value.
Can anyone help me with this?
did you
_textView.delegate = self;
?
I know it was 5 years ago, but it might help others, who like me stumble upon your question.
I use a UIToolbar as my inputAccessoryView (in my case it has a label, a flexible separator and a button).
On textFieldEditingChanged event I rebuild part of the toolbar like this
#IBAction func textFieldEditingChanged(_ sender: UITextField) {
//get a reference to the toolbar
let toolBar = sender.inputAccessoryView as! UIToolbar
//create a new label and set size + other properties
toolbarLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 40, height: 22))
toolbarLabel.text = mySpecificCalculatedString(sender.text!)
toolbarLabel.font = defaultFont(17)
toolbarLabel.adjustsFontSizeToFitWidth = true
let width = toolbarLabel.textRect(forBounds: CGRect(x: 0, y: 0, width: maxWidthForLabel, height: 0), limitedToNumberOfLines: 1).size.width
toolbarLabel.frame = CGRect(x: 0, y: 0, width: width, height: 22)
toolbarLabel.textColor = .black
toolbarLabel.tag = 666
//rebuild the specific tolbar item
let customView = UIBarButtonItem(customView: toolbarLabel)
toolBar.items![0] = customView
}
Note: simply changing the text of the label did not work for me either, I had to reinitialize it.
Hope it helps.