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iOS Object-Oriented Swift Classes and Objects Classes and Their Methods

Posted by Benjamin Gomola
Benjamin Gomola
1,761 Points

I am getting a compile error with self.price = price

I am getting a compile error with self.price = price and I don't know why.

I have the exact same code as Amit in the video

class Product {
    let title: String
    let price: Double = 0.0

    init(title: String, price: Double) {
        self.title = title
        self.price = price // cannot assign 'price' in 'self
    }

    func discountedPrice(percentage: Double) -> Double {
        return price - (price * percentage / 100)
    }

}

let quadcopter = Product(title: "Quadcopter", price: 499.99)

What am I doing wrong?

Thanks!

3 Answers

kjvswift93
kjvswift93
13,515 Points

This error is the result of having given the constant price an initial value when it was declared, as opposed to 'title' which was not given an initial value. If you remove the = 0.0 from the third line declaring the constant price, then the error will go away.

Philippe C么t茅
Philippe C么t茅
1,850 Points
Philippe C么t茅
Philippe C么t茅
1,850 Points

I think the video didn't show this error because Amit was running Swift 1.0 and we are today at version 1.2...

Benjamin Gomola
Benjamin Gomola
1,761 Points
Benjamin Gomola
Benjamin Gomola
1,761 Points

Just tried what you suggested and it worked. It was confusing cause the error wasn't indicated in the video and I was writing the code simultaneously and it came up for me.

Thanks for your help!

kjvswift93
kjvswift93
13,515 Points

That's strange the video's demonstration didn't show this as an error.

  • No problem. I enjoy picking up a new iOS forum question and answering it before one of those 30,000 point moderator geeks answers it within like 30 seconds!
Steve Hunter
Steve Hunter
57,712 Points

I was just starting to type pretty much the same thing when I noticed I didn't need to!

Good work!

Steve.