Question

我想通过从图像数组中选择一个随机值来更改显示的图像。

import UIKit

class ViewController: UIViewController {
    let imageArray = ["ball1", "ball2", "ball3", "ball4", "ball5"]
    var number: Int = 0

    @IBOutlet weak var myImage: UIButton!

    @IBAction func buttonPressed(_ sender: UIButton) {
        number = Int.random(in: 0 ... 4)
        myImage.image = UIImage(named: imageArray[number+1])
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        myImage.image = UIImage(named: "ball1")
        number = Int.random(in: 0 ... 4)
        myImage.image = UIImage(named: imageArray[number+1])

    }
}

在第19、24和26行（无论何时尝试更改图像），都会出现错误“无法分配给值：'image is a method'”。为什么会这样？

Answer 1

使用image属性设置state等于.normal：

import UIKit

class ViewController: UIViewController {
let imageArray = ["ball1", "ball2", "ball3", "ball4", "ball5"]
var number: Int = 0

@IBOutlet weak var myImage: UIButton!

@IBAction func buttonPressed(_ sender: UIButton) {
    number = Int.random(in: 0 ... 4)
    myImage.setImage(UIImage(named: imageArray[number+1]), for: .normal)
}

override func viewDidLoad() {
    super.viewDidLoad()
    myImage.setImage(UIImage(named: "ball1"), for: .normal)

    number = Int.random(in: 0 ... 4)
    myImage.setImage(UIImage(named: imageArray[number+1]), for: .normal)
}
}

无法分配值：“图像”是一种方法

1 个答案: