Question

好的，以下代码的目的是创建一个带有初始静态图像的UI图像动画，在通过UI按钮动作激活后，它将通过assets.xcassts中的一系列图像进行随机播放，然后在2个周期之后停。此外，当动画停止时，静态UI图像将更改为assets.xcasst中的随机图像。代码首先按照需要工作，但是每次触发UI按钮并且图像随机播放并且静态UI图像发生更改时，动画的repeatcount将增加1个循环。

var myImages = [UIImage]()



@IBAction func playRoundTapped(sender: UIButton) {

    for i in 1...3
    {
        myImages.append(UIImage(named: "\(i)")!)

    }


    firstDiceImageView.animationImages = myImages
    firstDiceImageView.animationRepeatCount = 2

    secondDiceImageView.animationImages = myImages
    secondDiceImageView.animationRepeatCount = 2

    thirdDiceImageView.animationImages = myImages
    thirdDiceImageView.animationRepeatCount = 2

    forthDiceImageView.animationImages = myImages
    forthDiceImageView.animationRepeatCount = 2

    firstDiceImageView.startAnimating()
    secondDiceImageView.startAnimating()
    thirdDiceImageView.startAnimating()
    forthDiceImageView.startAnimating()


}

以上是动画的代码。每个动画的animationRepeatCount设置为2个周期。在第一个按钮上单击它会根据需要循环两次，但是在第二个按钮上点击它会循环3次，而在第三个按钮上循环4次。

下面是包含所有代码的完整ViewController.swift文件。

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var begButton: UISwitch!
@IBOutlet weak var intButton: UISwitch!
@IBOutlet weak var advButton: UISwitch!
@IBOutlet weak var playRoundButton: UIButton!
@IBOutlet weak var forthDiceImageView: UIImageView!
@IBOutlet weak var thirdDiceImageView: UIImageView!
@IBOutlet weak var secondDiceImageView: UIImageView!
@IBOutlet weak var firstDiceImageView: UIImageView!

var myImages = [UIImage]()



@IBAction func playRoundTapped(sender: UIButton) {

    for i in 1...3
    {
        myImages.append(UIImage(named: "\(i)")!)

    }


    firstDiceImageView.animationImages = myImages
    firstDiceImageView.animationRepeatCount = 2

    secondDiceImageView.animationImages = myImages
    secondDiceImageView.animationRepeatCount = 2

    thirdDiceImageView.animationImages = myImages
    thirdDiceImageView.animationRepeatCount = 2

    forthDiceImageView.animationImages = myImages
    forthDiceImageView.animationRepeatCount = 2

    firstDiceImageView.startAnimating()
    secondDiceImageView.startAnimating()
    thirdDiceImageView.startAnimating()
    forthDiceImageView.startAnimating()


}

@IBAction func playRoundTapped2(sender: AnyObject) {

    let firstRandomNumber = arc4random_uniform(2) + 1
    let firstCardString:String = String(format: "side%i",
        firstRandomNumber)


    let secondRandomNumber = arc4random_uniform(1) + 1
    let secondCardString:String = String(format: "invert%i",
        secondRandomNumber)



    self.firstDiceImageView.image = UIImage(named: firstCardString)
    self.secondDiceImageView.image = UIImage(named: secondCardString)
    self.thirdDiceImageView.image = UIImage(named: "card_default")
    self.forthDiceImageView.image = UIImage(named: "card_default")
} 

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    self.firstDiceImageView.image = UIImage(named: "card_default")
    self.secondDiceImageView.image = UIImage(named: "card_default")
    self.thirdDiceImageView.image = UIImage(named: "card_default")
    self.forthDiceImageView.image = UIImage(named: "card_default")

}


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



}

Answer 1

看看下面代码的这一部分......

var myImages = [UIImage]()



@IBAction func playRoundTapped(sender: UIButton) {

for i in 1...3
{
    myImages.append(UIImage(named: "\(i)")!)

}


firstDiceImageView.animationImages = myImages
firstDiceImageView.animationRepeatCount = 2

secondDiceImageView.animationImages = myImages
secondDiceImageView.animationRepeatCount = 2

thirdDiceImageView.animationImages = myImages
thirdDiceImageView.animationRepeatCount = 2

forthDiceImageView.animationImages = myImages
forthDiceImageView.animationRepeatCount = 2

firstDiceImageView.startAnimating()
secondDiceImageView.startAnimating()
thirdDiceImageView.startAnimating()
forthDiceImageView.startAnimating()

}

在调用该函数之前，您正在创建myImages array。然后，当您调用该函数时，将图像附加到该函数。下次再调用此功能时，请再添加3张图像。你永远不会清空阵列。在@IBAction的开始时，您可以在附加3个图像之前使用myImages.removeAll清空数组。

Xcode Swift动画循环次数

1 个答案: