CODEWITHSUNDEEP
iosxcode7.3swift2
Gubby
Gubby

Reputation: 41

"Expected expression in list of expressions"

I am trying to use some code to make a beginner app using Xcode 7.3 and Swift 2.2 but I keep coming across the same problem. I have used similar code before but this just won't work. The error messages that come up are "Expected ',' separator" and when I do the fix it the same message comes up again and again. I also get "Expected expression in list of expressions" and "missing argument for parameter 'action' in call".They are all caused by the same line

   button.addTarget(self, action: #selector(RatingControl.ratingButtonTapped(_:)), forControlEvents: .TouchDown)

Here is the code

import UIKit

class RatingControl: UIView {

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        let button = UIButton(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
        button.backgroundColor = UIColor.redColor()
        button.addTarget(self, action: #selector(RatingControl.ratingButtonTapped(_:)), forControlEvents: .TouchDown)
        addSubview(button)
    }

    override func intrinsicContentSize() -> CGSize {
        return CGSize(width: 240, height: 44)
    }

    func ratingButtonTapped(button: UIButton) {
        print("Button pressed")
    }
}

Upvotes: 2

Views: 6321

Answers (6)

Márcio Abrantes
Márcio Abrantes

Reputation: 1

The my code is true with a code:

button.addTarget(self, action: "ratingButtonTapped:", forControlEvents: .TouchDown)

but, what diferente bettwen action: String and action: #selector

Upvotes: 0

DevMachine
DevMachine

Reputation: 563

You should clean the projects:

Product -> Clean

Upvotes: 0

Manish Pandey
Manish Pandey

Reputation: 23

You may try the following code:

button.addTarget(self, action: "ratingButtonTapped:", forControlEvents: .TouchDown)

Upvotes: 1

Eric Aya
Eric Aya

Reputation: 70097

#selector is Swift 2.2 which comes with Xcode 7.3, so you have to update Xcode to the latest version.

Once done, if your Xcode is confused after the upgrade, help it: go to menu "Product > Clean", and also clean the "derived data" folder if necessary.

Note: this is an answer made from my comments to OP which solved their issue.

Upvotes: 1

Charlie Hitchcock
Charlie Hitchcock

Reputation: 287

I had a similar issue where I had created the UIButton like this:

let button = UIButton()
button.frame = CGRect(x: 0.0, y: 0.0, width: size, height: size)

For me the error went away when I changed how the button was created:

let button = UIButton(type: .System)
button.frame = CGRect(x: 0.0, y: 0.0, width: size, height: size)

Neither cleaning the project nor deleting derived data fixed the issue for me. I was using Xcode 7.3.1.

Upvotes: 0

Oleg Tsibulevskiy
Oleg Tsibulevskiy

Reputation: 61

You need to Clean the project.

Press Shift + ⌘ + K

Upvotes: 6

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