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iOS

Mart Gaedtgens
Mart Gaedtgens
2,251 Points
Posted by Mart Gaedtgens
Mart Gaedtgens
2,251 Points

Integer value from a text label

So I tried to get in some practice after watching the iOS beginners course. But in my project I want to get a random number, and that random number's upperbound needs to be the input from the text label. Everytime I try something to convert the text label to an integer value, i.e.,

let number = Int(txtLabel.text!) [I know im not supposed to use ! but just for now] let randomNumber = arc4random_uniform(number)

it says: Cannot convert value of type 'Int?' to expected argument type 'UInt32' I have no idea what this means. Could someone please help me out so that the input from the textlabel will work as the Upperbound of the random number.

1 Answer

Brandon Mahoney
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.a{fill-rule:evenodd;}techdegree seal-36
Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points
Brandon Mahoney
.a{fill-rule:evenodd;}techdegree seal-36
Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points

Try this.

let numString = "10"
if let numInt = Int(numString){
    let randomNumber = GKRandomSource.sharedRandom().nextInt(upperBound: numInt)
}

Or

let numString = "10"
if let numInt = UInt32(numString) {
    let randomNumber = Int(arc4random_uniform(numInt))
}