Question

我正在使用Xamarin.IOS开发一个应用程序，我没有使用Xamarin.Forms 我有一个屏幕，我已经设置了一个图像视图现在我想在2/3/4图像之间进行转换（淡入淡出，移入...无所谓）有没有办法可以做到这一点？这是我的代码，直到现在：

        imgView.AnimationImages = new UIImage[] {
            UIImage.FromBundle ("tmp_running.jpg")
            , UIImage.FromBundle ("tmp_cycling.jpg")

        } ;
        imgView.AnimationRepeatCount = 0;
        imgView.AnimationDuration = 3;
        imgView.StartAnimating ();

我尝试过这种方法：

        CATransition customTransition = new CATransition();
        customTransition.FadeInDuration = 3.0f;
        customTransition.FadeOutDuration = 3.0f;
        customTransition.TimingFunction = CAMediaTimingFunction.FromName(
            CAMediaTimingFunction.EaseInEaseOut);
        customTransition.Type = CATransition.TransitionFade;

        and then : 
        imgView.Layer.AddAnimation(customTransition, null);

但没有任何效果。

你知道怎么做这个简单的任务吗？

Answer 1

可以这样做：

    static int count = 0;
    UIImageView _imageView;

    public override void ViewDidLoad ()
    {
        base.ViewDidLoad ();

        _imageView = new UIImageView (new CGRect(0, 0, 100, 100));
        _imageView.Image = new UIImage ("1.png");
        Add (_imageView);

        animateImage ();
    }

    public void animateImage()
    {
        var animationImages = new List<UIImage> () {
            UIImage.FromFile ("1.png"),
            UIImage.FromFile ("2.png"),
            UIImage.FromFile ("3.png"),
            UIImage.FromFile ("4.png"),
            UIImage.FromFile ("5.png")};

        UIImage image = animationImages[count % animationImages.Count];

        UIView.Transition (_imageView, 3.0,
            UIViewAnimationOptions.TransitionCrossDissolve,
            () => {_imageView.Image = image;},
            () => { animateImage ();
                    count++; }
        );
    }

Xamarin iOS图像转换过渡

1 个答案: