>核心(PCL)
> viewmodel(PCL)
> iOS(可执行文件)

如果我将图像添加到我的iOS项目(Resoureces / Images / test_image.png),那么我可以使用以下代码加载它：

UIImage image = UIImage.FromBundle("Images/test_icon.png");

现在,我想使用一个新的子项目

>控件(iOS库)

该库应该加载图像.我在Controls(Resoureces / Images / test_image.png)中添加了一个图像

但我无法在Controls proj中加载此图像.

我的问题：如何从iOS库加载图像？

public class MyButton : UIButton
    {
        public MyButton () : base()
        {
            Initialize ();
        }

        void Initialize()
        {
            // load image from bundle
            UIImage image = UIImage.FromBundle("Images/test_icon.png");
            // image is null
            this.SetImage (image,UIControlState.Normal);
        }
    }

而ViewController类是：

public partial class FirstView : MvxViewController
    {
        public FirstView () : base ("FirstView",null)
        {
        }

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

            // load image from bundle
//          UIImage image = UIImage.FromBundle("Images/test_icon.png");
//          image is not null if added in iOS Proj
//          this.imageView.Image = image;

            MyButton button = new MyButton ();

            View.Add (button);

            View.AddConstraint (NSLayoutConstraint.Create (button,NSLayoutAttribute.Right,NSLayoutRelation.Equal,View,1,10));
            View.AddConstraint (NSLayoutConstraint.Create (button,NSLayoutAttribute.Top,74));
            View.AddConstraint (NSLayoutConstraint.Create (button,NSLayoutAttribute.Width,null,NSLayoutAttribute.NoAttribute,64)); 
            View.AddConstraint (NSLayoutConstraint.Create (button,NSLayoutAttribute.Height,64)); 
        }
    }

这是完整的项目：https://bitbucket.org/ww_wschaefer/xamarin-first-crossover-app/overview