I have a label with a minus and plus button beside it. What I want it to do is increment the value of the label by 1 if the plus button is tapped, and subtract 1 if the minus button is tapped.
So, + and - are buttons ?
Just create:
- IBOulet for the label : myLabel
@IBOutlet weak var myLabel: UILabel!- IBActions for the buttons, such as:
@IBAction func plus() {
guard let presentValue = Int(myLabel!.text) else { return }
let newValue = presentValue + 1
myLabel!.text = String(newValue)
}idem for minus.
So, + and - are buttons ?
Just create:
- IBOulet for the label : myLabel
@IBOutlet weak var myLabel: UILabel!- IBActions for the buttons, such as:
@IBAction func plus() {
guard let presentValue = Int(myLabel!.text) else { return }
let newValue = presentValue + 1
myLabel!.text = String(newValue)
}idem for minus.
See this SO thread for an example of stepper functions w/Swift:
https://stackoverflow.com/questions/51657448/plus-and-minus-buttons-for-a-shopping-app-in-swift
How would I get the label so that it can't go below 1?
What are the values you want for label ? Positive and negative ?
You should initially set the label to "0" for instance ; or to any initial value you like.
With this, you can have what you want (connect the "-" button to this :
@IBAction func minus() {
guard let presentValue = Int(myLabel!.text) else { return }
let newValue = presentValue - 1
myLabel!.text = String(newValue)
}Do you use a UIStepper or 2 individual buttons ?
It is even simpler with stepper, but you have to set a maximum and minimum (they can be very very large!)
I am happy to use a stepper how would I connect it to the label or if possible can I display the number between the - and + in the stepper?
Create the stepper in IB.
From the stepper, control-drag to create an IBAction (will be connected to value change)
@IBOutlet weak var stepperContentLabel: UILabel! // The label where you want to write
@IBAction func stepped(_ sender: UIStepper) { // Connected to the stepper
stepperContentLabel.text = String(sender.value)
}The only thing I want to fix is the fact that right now it displays the numbers as 1.0 I want it to be displayed as 1. How would I do this?
Just replace
@IBAction func stepped(_ sender: UIStepper) { // Connected to the stepper
stepperContentLabel.text = String(Int(sender.value))
}