无法使用imageview

Question

我有一个非常简单的单点触控应用程序，我试图在uiimageview中引用图像，但我没有成功。下面是代码清单和我不断得到的错误。请帮帮忙。我不知道我做错了什么，我已经仔细检查过GoldenGate.jpg是我项目的一部分

using System;
using System.Collections.Generic;
using System.Linq;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace helloworld10
{
    public class Application
    {
        static void Main (string[] args)
        {
            UIApplication.Main (args);
        }
    }

    // The name AppDelegate is referenced in the MainWindow.xib file.
    public partial class AppDelegate : UIApplicationDelegate
    {
        // This method is invoked when the application has loaded its UI and its ready to run
        public override bool FinishedLaunching (UIApplication app, NSDictionary options)
        {
            // If you have defined a view, add it here:
            // window.AddSubview (navigationController.View);

            UIImage image = UIImage.FromFile("GoldenGate.jpg");
            UIImageView imageview = new UIImageView(image);

            Console.WriteLine ("hello world");

            window.MakeKeyAndVisible ();



            return true;
        }

        // This method is required in iPhoneOS 3.0
        public override void OnActivated (UIApplication application)
        {
        }
    }
}

但是，我得到了以下错误。请帮帮我

Error connecting stdout and stderr (127.0.0.1:10001)

Unhandled Exception: System.ArgumentNullException: Argument cannot be null.
Parameter name: image
  at MonoTouch.UIKit.UIImageView..ctor (MonoTouch.UIKit.UIImage image) [0x00064] in /Users/plasma/Source/iphone-3/monotouch/UIKit/UIImageView.g.cs:106 
  at helloworld10.AppDelegate.FinishedLaunching (MonoTouch.UIKit.UIApplication app, MonoTouch.Foundation.NSDictionary options) [0x0000b] in /Users/zulfiqarsyed/Projects/helloworld10/helloworld10/Main.cs:28 
  at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
  at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/plasma/Source/iphone-3/monotouch/UIKit/UIApplication.cs:26 
  at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in /Users/plasma/Source/iphone-3/monotouch/UIKit/UIApplication.cs:31 
  at helloworld10.Application.Main (System.String[] args) [0x00000] in /Users/zulfiqarsyed/Projects/helloworld10/helloworld10/Main.cs:14 

Answer 1

看起来像是个虫子。图像必须放在文件夹中，例如@"Images/GoldenGate.jpg" (构建操作设置为"Content")

Answer 2

项目中的文件名为"GoldenGate.jpg“吗？请记住，iOS设备区分大小写，而仿真器仅区分大小写。您是否也将文件标记为项目中的内容？

Answer 3

我也有同样的问题。当它找不到有问题的图像时，就会出现错误。当A)某个内容拼写错误时，例如图像名称(区分大小写)，或者路径错误并且B)文件没有被标记为"Content“时，就会发生这种情况。

其他每个人都已经提到将其标记为内容，我将详细说明文件的位置。您可以将其存储在根目录下，或者更好地创建一个文件夹，并将其命名为您喜欢的任何名称。然后将图像引用为

var image = UIImage.FromBundle (“文件夹名称/GoldenGate.jpg”)；