Day 5

 

Printing the value of the random number in the correct label

 

• First creating an IBOutlet for the label to display the target random number and a global targetValue to hold the target random number.

 

@IBOutlet weak var targetLabel: UILabel!
var targetValue: Int = 0

• Connecting this outlet to the label displaying 100 currently.
• Since we need to update the targetValue for every round, we create a method startNewRound in which we generate a random value and assign it to targetValue. For swift 4.2+, we can generate random values using “Int.random(in: range)”. I have swift 4.1, therefore I used arc4random_uniform method.
• In the updateLabels method, we convert the targetValue to String and assign it to the targetLabel.

 

func startNewRound(){
        targetValue = Int(arc4random_uniform(101))
        currentValue = 50
        slider.value = Float(currentValue)
        updateLabels()
    }

func updateLabels(){
        targetLabel.text = String(targetValue)
    }

 

 

 

Calculating the difference between targetValue and sliderValue and displaying the difference in Alert box

 

• To make sure the difference between currentValue and targetValue stays positive, we multiply the difference by -1.
• Then we add the message to display the difference in the Alert box.

 

        var difference: Int
        
        difference = currentValue - targetValue
        if difference < 0{
            difference = difference * -1
        }

        let message: String = "The value of the slider is: \(currentValue)" + "\nThe value of the target is: \(targetValue)" + "\nThe value of the difference is: \(difference)"