Question

我正在尝试在Xamarin Studio中创建一个简单的Hello World测试应用程序。我创建了一个没有故事板的空白单视图iPhone应用程序。

我拖着＆amp;在View上放一个ImageView并连接它的插座。就这么简单。

当我在模拟器中运行时，它工作正常但在设备上调试时会抛出NSUnknownKeyException。

我检查了通常的嫌疑人：

使用感叹号检查未定义的插座
检查了designer.cs文件
检查.h和.m文件
清洁＆amp;重建所有
从部署选项
设置自定义类定义
使用-f选项编译
更新到最新的Xcode，Monotouch＆amp; Xamarin Studio（Xamarin Studio 4.2.3，Xcode 5.1,7.2.0.2（简化版）
将iPhone 5s更新为IOS 7.1

我仍然得到同样的例外。以下是代码和错误信息。我在这里错过了一个非常明显的事情，或者某种程度上Xcode和Xamarin Studio之间的同步失败了吗？

我感谢任何帮助。

错误日志

MonoTouch.Foundation.MonoTouchException：抛出Objective-C异常。名称：NSUnknownKeyException原因：[setValue：forUndefinedKey：]：此类不是键值符合编码的关键imgTest。 at at（包装托管到原生）MonoTouch.ObjCRuntime.Messaging：void_objc_msgSend （intptr，intptr）在MonoTouch.UIKit.UIWindow.MakeKeyAndVisible（） [0x00008] in /Developer/MonoTouch/Source/monotouch/src/build/compat/UIKit/.pmcs-compat.UIWindow.g.cs:130 在TestProject.AppDelegate.FinishedLaunching （MonoTouch.UIKit.UIApplication应用程序，MonoTouch.Foundation.NSDictionary 选项）[0x00038] in /Users/gorken/Projects/TestProject/TestProject/AppDelegate.cs:31 at at（包装器托管到原生） MonoTouch.UIKit.UIApplication：UIApplicationMain （int，string []，intptr，intptr）在MonoTouch.UIKit.UIApplication.Main （System.String [] args，System.String principalClassName，System.String delegateClassName）[0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/.pmcs-compat.UIApplication.cs:38 在TestProject.Application.Main（System.String [] args）[0x00008]中 /Users/gorken/Projects/TestProject/TestProject/Main.cs:16

TestProjectViewController.cs

using System;
using System.Drawing;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace TestProject
{
    public partial class TestProjectViewController : UIViewController
    {
        public TestProjectViewController () : base ("TestProjectViewController", null)
        {
        }

        public override void DidReceiveMemoryWarning ()
        {
            // Releases the view if it doesn't have a superview.
            base.DidReceiveMemoryWarning ();

            // Release any cached data, images, etc that aren't in use.
        }

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

            // Perform any additional setup after loading the view, typically from a nib.
        }
    }
}

TestProjectViewController.designer.cs

using MonoTouch.Foundation;
using System.CodeDom.Compiler;

namespace TestProject
{
    [Register ("TestProjectViewController")]
    partial class TestProjectViewController
    {
        [Outlet]
        MonoTouch.UIKit.UIImageView imgTest { get; set; }

        void ReleaseDesignerOutlets ()
        {
            if (imgTest != null) {
                imgTest.Dispose ();
                imgTest = null;
            }
        }
    }
}

AppDelegate.cs

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

namespace TestProject
{
    // The UIApplicationDelegate for the application. This class is responsible for launching the
    // User Interface of the application, as well as listening (and optionally responding) to
    // application events from iOS.
    [Register ("AppDelegate")]
    public partial class AppDelegate : UIApplicationDelegate
    {
        // class-level declarations
        UIWindow window;
        TestProjectViewController viewController;
        //
        // This method is invoked when the application has loaded and is ready to run. In this
        // method you should instantiate the window, load the UI into it and then make the window
        // visible.
        //
        // You have 17 seconds to return from this method, or iOS will terminate your application.
        //
        public override bool FinishedLaunching (UIApplication app, NSDictionary options)
        {
            window = new UIWindow (UIScreen.MainScreen.Bounds);

            viewController = new TestProjectViewController ();
            window.RootViewController = viewController;
            window.MakeKeyAndVisible ();

            return true;
        }
    }
}

TestProjectViewController.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>


@interface TestProjectViewController : UIViewController {
}
@property (retain, nonatomic) IBOutlet UIImageView *imgTest;

@end

TestProjectViewController.m

#import "TestProjectViewController.h"

@implementation TestProjectViewController

- (void)dealloc {
    [_imgTest release];
    [super dealloc];
}
@end

xib文件

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="5053" systemVersion="13C64" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
    <dependencies>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3733"/>
    </dependencies>
    <objects>
        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="TestProjectViewController">
            <connections>
                <outlet property="imgTest" destination="PLQ-yP-dMH" id="f4J-3q-Qoq"/>
                <outlet property="view" destination="6" id="7"/>
            </connections>
        </placeholder>
        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
        <view clearsContextBeforeDrawing="NO" contentMode="scaleToFill" id="6">
            <rect key="frame" x="0.0" y="0.0" width="320" height="480"/>
            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
            <subviews>
                <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" id="PLQ-yP-dMH">
                    <rect key="frame" x="0.0" y="0.0" width="320" height="480"/>
                    <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                </imageView>
            </subviews>
            <color key="backgroundColor" white="0.75" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
        </view>
    </objects>
</document>

Answer 1

快速谷歌后，我发现清理和重建您的解决方案有助于消除此错误（https://bugzilla.xamarin.com/show_bug.cgi?id=15002）。要清理和重建您的解决方案，请在Xamarin工作室中，转到屏幕顶部的“构建”，然后单击“全部清除”。之后，单击“全部重建”。

如果这对您不起作用，请查看“主界面”设置中的info.plist。错误可能会引发此异常。

此异常的另一个原因可能是Interface Builder中不再存在控件的插座。再次检查设计器文件（如果一切正常，可以使用Xcode进行额外检查）。

如果这有助于您，请告诉我。祝你好运！

爱和问候，的Björn

应用程序在模拟器中工作正常但在设备上抛出NSUnknownKeyException异常

1 个答案: