Question

我一直试图在Swift中为GIF制作动画，但它只是不起作用。我想我找到了办法，但是有错误，请帮助。

以下是代码：

@IBOutlet var imageView: UIImageView!
override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    // (Here is the error it states "Cannot assign a value of type '[UIImage?]' to a value of type '[UIImage]?'")
    imageView.animationImages = [

        UIImage(named: "logo1.jpg"),
        UIImage(named: "logo2.jpeg"),
        UIImage(named: "logo3.png")
    ]

    imageView.animationDuration = 3
    imageView.startAnimating()
}

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

Answer 1

您可以直接运行gif文件，请点击以下链接;

https://github.com/kaishin/gifu

How to load GIF image in Swift?

就代码中的问题而言，正如'Leo Dabus'指出的那样，你是不是在解包UIImage实例。尝试使用以下修改的相同代码。

imageView.animationImages = [

        UIImage(named: "logo1.jpg")!, //File Extension would not be required if .png
        UIImage(named: "logo2.jpeg")!,  //File Extension would not be required if .png
        UIImage(named: "logo3.png")!
    ]

    imageView.animationDuration = 3
    imageView.startAnimating()

Answer 2

您只需要打开UIImage（命名:)方法返回的可选UIImage。试试这样：

class ViewController: UIViewController {
    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        imageView.animationImages = [
            UIImage(named: "logo1")!,
            UIImage(named: "logo2")!,
            UIImage(named: "logo3")!]

        imageView.animationDuration = 3
        imageView.startAnimating()
    }

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


}

Answer 3

我为你创造了一个例子。

这是代码：

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        imageView.animationImages = [
            UIImage(named: "1")!,
            UIImage(named: "2")!,
            UIImage(named: "3")!,
            UIImage(named: "4")!,
            UIImage(named: "5")!,
            UIImage(named: "6")!,
            UIImage(named: "7")!,
            UIImage(named: "8")!,
            UIImage(named: "9")!,
            UIImage(named: "10")!,
            UIImage(named: "11")!,
            UIImage(named: "12")!

        ]

        imageView.animationDuration = 3
        imageView.startAnimating()
    }
}

您可以看到结果HERE。

HERE是示例项目。

在Swift中动画Gif

3 个答案: