【发布时间】：2014-03-28 09:07:30
【问题描述】：
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 Story Board 的空白 Single View iPhone 应用程序。
我在视图上拖放一个 ImageView 并为其连接一个插座。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：
- 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
- 全部清理并重建
- 从部署选项中清除主界面设置
- 设置自定义类定义
- 使用 -f 选项编译
- 更新到最新的 Xcode、Monotouch 和 Xamarin Studio（Xamarin Studio 4.2.3、Xcode 5.1、7.2.0.2（入门版）
- 将 iPhone 5s 更新到 IOS 7.1
我仍然遇到同样的异常。以下是代码和错误信息。我是否在这里遗漏了一个非常明显的事情，或者 Xcode 和 Xamarin Studio 之间的同步失败了？
感谢您的帮助。
错误日志
MonoTouch.Foundation.MonoTouchException：抛出 Objective-C 异常。 名称：NSUnknownKeyException 原因：[setValue:forUndefinedKey:]：这个类不是键值 键 imgTest 的编码兼容。在 at （包装 托管到本机）MonoTouch.ObjCRuntime.Messaging:void_objc_msgSend (intptr,intptr) 在 MonoTouch.UIKit.UIWindow.MakeKeyAndVisible () [0x00008] 在 /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] 在 /Users/gorken/Projects/TestProject/TestProject/AppDelegate.cs:31 在 在（包装器托管到本机） MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) 在 MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] 在 /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>
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