How do I make an array of UILabel in Swift. When I try to, I get an error like ViewController.Type'dose not have a member named 'Lable00'
my code:
import UIKit
class ViewController: UIViewController {
let individualScores = [75, 43, 103, 87, 12]
#IBOutlet var Lable00: UILabel?
#IBOutlet var Lable01: UILabel?
#IBOutlet var Lable02: UILabel?
#IBOutlet var Lable03: UILabel?
#IBOutlet var Lable04: UILabel?
var Lable_Arr = [Lable00, Lable01, Lable02, Lable03, Lable04]
override func viewDidLoad() {
super.viewDidLoad()
for score in individualScores {
}
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
private var labels:[UILabel]()
override func viewDidLoad()
{
super.viewDidLoad()
labels.append(Lable00)
labels.append(Lable01)
labels.append(Lable02)
labels.append(Lable03)
labels.append(Lable04)
// do stuff with the labels view
}
for Swift 2 :
var labels:[UILabel]=[]
In ViewDid load you don't have to append, you can just assign a new array to labels like so:
var labels:[UILabel]()
override func viewDidLoad() {
super.viewDidLoad()
labels = [label01, label02, label03, label04]
// do stuff with the labels view
}
Related
I want to create a simple BMI calculator using height and weight and I am having trouble converting my UITextField strings to integers for the calculation.
Here's my working code:
import UIKit
class BMICalculator: UIViewController {
//MARK: Properties
#IBOutlet weak var weightField: UITextField!
#IBOutlet weak var heightField: UITextField!
#IBOutlet weak var solutionTextField: UILabel!
#IBAction func calcButton(_ sender: AnyObject) {
let weightInt = Int(weightField)
let heightInt = Int(heightField)
solutionTextField.text = weightInt/(heightInt*heightInt)
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Anyone have any ideas? I tried searching for the solution but couldn't find anything specific to this issue.
Use this:
guard let text1 = weightField.text else {
return
}
guard let text2 = heightField.text else {
return
}
guard let weightInt = Int(text1) else {
return
}
guard let heightInt = Int(text2) else {
return
}
solutionTextField.text = weightInt /(heightInt*heightInt)
//Change your name for this outlet 'solutionTextField' to 'solutionLabel' since it is a UILabel not UITextField
The TextField only accepts a String, it wont take an Int.
Change this:
solutionTextField.text = weightInt/(heightInt*heightInt)
To this:
solutionTextField.text = String(weightInt/(heightInt*heightInt))
I don't think your code is working. To get the values out of your UITextFields and convert them to Ints, you'll need to pull them out of the '.text properties. Then, when you calculate the result, you'll need to convert it back to a string and set solutionTextField?.text equal to that result.
class BMICalculator: UIViewController {
//MARK: Properties
#IBOutlet weak var weightField: UITextField!
#IBOutlet weak var heightField: UITextField!
#IBOutlet weak var solutionTextField: UILabel!
#IBAction func calcButton(_ sender: AnyObject) {
let weightInt = Int((weightField?.text!)!)
let heightInt = Int((heightField?.text!)!)
let solution = weightInt!/(heightInt!*heightInt!)
solutionTextField?.text = "\(solution)"
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Keep in mind that this code is very dangerous because you're not safely unwrapping optionals, but that's a different thread.
Hope this helps.
This is my second view called detail view and I am bringing over text from the first view into the detail view. Some of the text is larger than others, so I am trying to make it to where my textview changes automatically to adapt to the amount of text needed. I am still new to Swift so any help is appreciated.
import UIKit
class DetailViewController: UIViewController {
#IBOutlet weak var scrollView: UIScrollView!
#IBOutlet weak var symptomsTextView: UITextView!
#IBOutlet weak var stepsTextView: UITextView!
#IBOutlet weak var emergencyLabel: UILabel!
var medicalObject : MedicalInfo? = nil
var emergencyText = ""
var symptomsText = ""
var stepsText = ""
//Function to show text in labels and text views
override func viewWillAppear(animated: Bool) {
//Adding text to the labels and text views
emergencyLabel.text = emergencyText
symptomsTextView.text = symptomsText
stepsTextView.text = stepsText
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
import UIKit
class SecondViewController: UIViewController {
#IBOutlet weak var labelA: UILabel!
#IBOutlet weak var labelB: UILabel!
var dataPassed:String!
var secondDataPassed:String!
var newVar: String!
var newVar2: String!
override func viewDidLoad() {
super.viewDidLoad()
labelA.text = dataPassed
labelB.text = secondDataPassed
newVar = labelA.text
println(newVar)
}
println(newVar) *** I can't access newVar outside override func viewDidLoad() { - Gives "expected declaration" Its driving me crazy!!!***
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Is there any data in dataPassed? If you don't assign any String to your dataPassed variable, and then you assign newVar to dataPassed, newVar will have nothing to print.
Try:
import UIKit
class SecondViewController: UIViewController {
#IBOutlet weak var labelA: UILabel!
#IBOutlet weak var labelB: UILabel!
var dataPassed:String! = "Test."
var secondDataPassed:String!
var newVar: String!
var newVar2: String!
override func viewDidLoad() {
super.viewDidLoad()
labelA.text = dataPassed
labelB.text = secondDataPassed
newVar = labelA.text
println(newVar)
}
Secondly, it appears that you're trying to println again outside of the function. That isn't going to work, because viewDidLoad is essentially the "main method" of your app. You can create other functions that respond to button touches, etc... and run a println there, but because Swift code is executed functionally, the code you're executing has to be inside of a particular function. While you can declare variables, as you have, you can't perform actions such as printing them outside of a function, because then there's no order/method to the madness.
The only place where you can run Swift code on a standalone basis without functions is in a Swift Playground. In XCode you can select File -> New -> Playground to try this out.
import UIKit
class DetailsViewController: UIViewController, UIScrollViewDelegate {
// titolo dell'annotazione selezionata proveniente dalla ViewController
var titoloStringa = ""
/*
// riferimento alla scrollView delle immagini
#IBOutlet var scrollView: UIScrollView!
// riferimento al page control relativo alle immagini
#IBOutlet var pageControl: UIPageControl!
// array che conterrà le immagini
var pageImages: [UIImage] = []
// array di optionals che conterrà istanze di UIImageView per mostrare ogni immagine nella sua relativa pagina
var pageViews: [UIImageView?] = []
*/
// riferimento alla label titolo
#IBOutlet weak var titolo: UILabel!
#IBOutlet weak var scroolView: UIScrollView!
#IBOutlet weak var labelTesto: UILabel!
#IBOutlet weak var pageControl: UIPageControl!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidLayoutSubviews(){
super.viewDidLayoutSubviews()
self.labelTesto.numberOfLines = 0
self.labelTesto.sizeToFit() }
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.*/
}
Why doesn't the scroll vertical work? I will implement after the scrolling of images with control page. how can i do it?
You need to make sure your UIScrollView height not more than ViewController height.
import UIKit
class ViewController: UIViewController, UIScrollViewDelegate {
#IBOutlet weak var scroolView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
scroolView.contentSize = CGSizeMake(400, 2300)
scroolView.showsHorizontalScrollIndicator = true
scroolView.scrollEnabled = true
}
}
I want to have a UIScrollView of UIViewControllers. I tested the ScrollView and it works fine, except when I try to add the ViewControllers. The project builds fine, but I get a "fatal error: unexpectedly found nil while unwrapping an Optional value" error that points at the ViewController, particularly the line:
self.imageView.image = UIImage(named: self.image!)
However, when I inspect the object, I can see variables image and text have values in the ViewController. I'm using Xcode 6.3 Beta and building to iOS8.1 target.
Here's the code:
import UIKit
class ViewController: UIViewController {
//#IBOutlet weak var contentScrollView: UIScrollView!
#IBOutlet var contentScrollView: UIScrollView!
//test to make sure ScrollView functions
//let colors = [UIColor.redColor(),UIColor.blueColor(), UIColor.greenColor(), UIColor.whiteColor(), UIColor.blackColor(), UIColor.yellowColor()]
var frame = CGRectMake(0, 0, 0, 0)
var dataArray = [PostItem]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var da = PostItem(text: "test 1", pic: "beans.jpg")
self.dataArray.append(da!)
da = PostItem(text: "test 2", pic: "coffee.jpg")
self.dataArray.append(da!)
da = PostItem(text: "test 3", pic: "coffeeCup.jpg")
self.dataArray.append(da!)
for index in 0..<self.dataArray.count{
self.frame.origin.y = self.contentScrollView.frame.size.height * CGFloat(index)
self.frame.size = self.contentScrollView.frame.size
self.contentScrollView.pagingEnabled = false
let tempPost = self.dataArray[index]
var vc = PostViewController()
vc.text = tempPost.postText
vc.image = tempPost.postImage
self.contentScrollView.addSubview(vc.view)
}
self.contentScrollView.contentSize = CGSizeMake(self.view.frame.size.width, CGFloat(self.dataArray.count) * self.contentScrollView.frame.height)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}}
And here is the code for the ViewController I want to add:
import UIKit
class PostViewController: UIViewController {
//let postItem
#IBOutlet weak var imageView: UIImageView!
#IBOutlet weak var postToFBButton: UIButton!
#IBOutlet weak var postToTwitterButton: UIButton!
#IBOutlet weak var postText: UILabel!
var image:String?
var text:String?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.imageView.image = UIImage(named: self.image!)
self.postText.text = text!
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}}
The fix is to create the PostViewController through instantiateViewControllerWithIdentifier from storyboard, this way, it will have an imageView loaded from storyboard when its view is added to the scrollview.