ios - 从数组中动态添加 UIImageView

Question

我想动态地将 UIImageViews 数组添加到 View 中。当我迭代 for 循环时，似乎只添加了最后一个 UIImageView，而不是数组中的所有内容:

// same image to be used 
let imageName = "img.png"
let image = UIImage(named: imageName)

// array of UIImageViews
var images : [UIImageView?] = Array(count: 10, repeatedValue: UIImageView(image: image))

// iterate and add to view
for i in 0...9 {

    // setup UIImageView
    // this is how I know only the last UIImageView is added to the parent view
    // the y cordinate is about 10 points down (this is expected of i+i array size with of 10)

    images[i]?.frame = CGRect(x: 10, y: CGFloat(i+i), width: image!.size.width, height: image!.size.height)   

    // add to parent view
    parentView.addSubview(images[i]!)

}

有没有简单的解决办法？我感觉好像我错过了一些明显的东西。

Answer 1

因为您使用的是Array(count: 10,repeatedValue: UIImageView(image: image))，repeatedValue表示您要添加到此的所有 ImageView 数组引用同一个对象。这样一来，你就只有一个imageview，怎么可能添加那么多副本呢。检查我的答案。

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let myWidth = 40
        let myHeight = 40

        // same image to be used
        let imageName = "img.png"
        let image = UIImage(named: imageName)

        // iterate and add to view
        for i in 0...9 {
            var imageView: UIImageView = UIImageView(image: image)
            imageView.frame = CGRect(x: 10, y: myHeight * i, width: myWidth, height: myHeight)

            // add to parent view
            self.view.addSubview(imageView)

        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}