如何通过按一个按钮从一个数组中随机快速地引出一个简单的报价？

Question

I am completely new to coding.

I started using this app called MIMO and learned a few bits and pieces. In one chapter they let us code a simple "dice app" where by pressing a button a number from 1 - 6 appears. Now I wanted to rewrite that so that at the button press the app displays a quote from a predetermined array.

I am completely stuck, however.

Here's what I got:

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var quotesLabel: UILabel!

    let quotes = ["Quote1!", "Quote2!"]
    let randomIndex = Int(arc4random_uniform(UInt32(quotes.count)))
    let randomQuote = quotes[randomIndex]
    print(array[randomIndex])

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

Answer 1

Basically any arbitrary code must be run in a method, in this case in an IBAction which is triggered when the button is pressed. The method viewDidLoad is not needed.

• Change the code to

   import UIKit class ViewController: UIViewController { @IBOutlet weak var quotesLabel: UILabel! let quotes = ["Quote1!", "Quote2!", "Quote3!", "Quote4!"] @IBAction func showRandomQuote(_ sender : UIButton) { let randomIndex = Int(arc4random_uniform(UInt32(quotes.count))) let randomQuote = quotes[randomIndex] quotesLabel.text = randomQuote } } 

• In Interface Builder drag a button into the canvas of the view controller

• Connect ( ⌃ - drag ) the button to the IBAction and the label to the IBOutlet
• Run the app and press the button