C# 当我点击我的UI按钮时，iOS应用程序崩溃 总结

这是我试图用Xamarin制作的第一个应用程序。我正在学习Hello World，iPhone的例子。当我点击我的按钮时，应用程序崩溃了，我不知道为什么

细节 我有一个简单的UIViewController和一个UIButton。我已经创建了一个出口，所以当我点击按钮时，我会做一些事情

当我连接按钮的TouchUpInside事件时，当我单击按钮时，应用程序崩溃。当我删除有线事件但插座仍然存在时，当我单击按钮时，应用程序不会崩溃。当然，没有任何事情发生，因为没有任何事情是有关联的

让我沮丧的是，我不知道什么是错误的，使用调试信息，我无法找出它！我已经做了很多年的C代码了，但是仅仅从Xam开始就有点不同了，特别是当崩溃报告缺少任何信息的时候。我猜我可能勾选了一些设置，例如没有调试信息

所以这里有一些代码

AuthenticationViewController .h文件

设计器文件

最后，我的

.cs文件

下面是缺少的崩溃转储/堆栈跟踪

2013-10-25 21:37:13.785 FooClientiPhone[8852:1403] MonoTouch: Socket error while connecting to MonoDevelop on 127.0.0.1:10000: Connection refused
mono-rt: Stacktrace:

mono-rt:   at <unknown> <0xffffffff>

mono-rt:   at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <IL 0x0009f, 0xffffffff>

mono-rt:   at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38

mono-rt:   at Foo.Client.iPhone.Application.Main (string[]) [0x00008] in /Users/PureKrome/Documents/Mac Projects/Foo iOS Client/Code/Foo.Client.iPhone/Main.cs:16

mono-rt:   at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

mono-rt: 
    Native stacktrace:

 mono-rt: 
    =================================================================
    Got a SIGSEGV while executing native code. This usually indicates
        a fatal error in the mono runtime or one of the native libraries 
            used by your application.
            =================================================================

我陷入困境，不知道如何继续

此外，请选择720p版本

---

以下是从xCode的角度来看的。

我认为IBOutlet正在导致应用程序崩溃。这仅仅是因为IBOutlets用于状态，而不是用于调用方法。在这种情况下，应将按钮连接到iAction：

- (IBAction)Google:(id)sender; 

这最终将要求：

Google.TouchUpInside += (sender, e) => 
            {
                xxx++;
            };

另外，请注意，在现代objective-c中，您不需要@synthesis Google=\u Google；这将自动发生

---

快乐的Xamarin编码。

你为一个简单的hello world编写了很多代码

这是你不需要的

@property (nonatomic, retain) IBOutlet UIButton *Google;
@synthesize Google = _Google;

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

namespace  Foo . Client . iPhone
{ 

[ Register  ( "AuthenticationViewController" )] 
partial  class  AuthenticationViewController 
{ 
    [ Outlet ] 
    MonoTouch . UIKit . UIButton  Google  {  get ;  set ;  } 

    void  ReleaseDesignerOutlets  () 
    { 
        if  ( Google  !=  null )  { 
            Google . Dispose  (); 
            Google  =  null ; 
        } 
       } 
    } 
   }
  using System;
  using System.Drawing;
  using MonoTouch.Foundation;
  using MonoTouch.UIKit;

  namespace Foo.Client.iPhone
 {
 public partial class AuthenticationViewController : UIViewController
 {
    public int xxx = 0;
    public event EventHandler OnAuthenticationCompleted;

    public AuthenticationViewController() 
        : base ("AuthenticationViewController", 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();

        Google.TouchUpInside += (sender, e) => 
        {
            xxx++;
        };
    }
   }
   } 2013-10-25 21:37:13.785 FooClientiPhone[8852:1403] MonoTouch: Socket error while           connecting to MonoDevelop on 127.0.0.1:10000: Connection refused
    mono-rt: Stacktrace:

   mono-rt:   at <unknown> <0xffffffff>

  mono-rt:   at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain         (int,string[],intptr,intptr) <IL 0x0009f, 0xffffffff>

  mono-rt:   at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38

  mono-rt:   at Foo.Client.iPhone.Application.Main (string[]) [0x00008] in /Users/PureKrome/Documents/Mac Projects/Foo iOS Client/Code/Foo.Client.iPhone/Main.cs:16

mono-rt:   at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object          (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

   mono-rt: 
   Native stacktrace:
  mono-rt: 
   =================================================================
    Got a SIGSEGV while executing native code. This usually indicates
    a fatal error in the mono runtime or one of the native libraries 
        used by your application.
        =================================================================

---

这告诉我们，也许我们正在失去一些参考。我知道有人已经说过要启用僵尸，但这可能不是包装器/编译器的选项

mono-rt:   at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

只要：

@interface AuthenticationViewController : UIViewController 
@property (nonatomic, retain) IBOutlet UIButton *Google;

---

当您单击该按钮时，编译器可能不知道您在说什么。

在未调试的情况下运行应用程序时是否会发生崩溃？是的。删除不必要的代码总是好的。但也许询问者需要一些，这导致了坠机。有什么想法或评论可能导致了这次坠机？

Google.TouchUpInside += (sender, e) => 
            {
                xxx++;
            };

@property (nonatomic, retain) IBOutlet UIButton *Google;
@synthesize Google = _Google;

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

namespace  Foo . Client . iPhone
{ 

[ Register  ( "AuthenticationViewController" )] 
partial  class  AuthenticationViewController 
{ 
    [ Outlet ] 
    MonoTouch . UIKit . UIButton  Google  {  get ;  set ;  } 

    void  ReleaseDesignerOutlets  () 
    { 
        if  ( Google  !=  null )  { 
            Google . Dispose  (); 
            Google  =  null ; 
        } 
       } 
    } 
   }
  using System;
  using System.Drawing;
  using MonoTouch.Foundation;
  using MonoTouch.UIKit;

  namespace Foo.Client.iPhone
 {
 public partial class AuthenticationViewController : UIViewController
 {
    public int xxx = 0;
    public event EventHandler OnAuthenticationCompleted;

    public AuthenticationViewController() 
        : base ("AuthenticationViewController", 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();

        Google.TouchUpInside += (sender, e) => 
        {
            xxx++;
        };
    }
   }
   } 2013-10-25 21:37:13.785 FooClientiPhone[8852:1403] MonoTouch: Socket error while           connecting to MonoDevelop on 127.0.0.1:10000: Connection refused
    mono-rt: Stacktrace:

   mono-rt:   at <unknown> <0xffffffff>

  mono-rt:   at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain         (int,string[],intptr,intptr) <IL 0x0009f, 0xffffffff>

  mono-rt:   at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38

  mono-rt:   at Foo.Client.iPhone.Application.Main (string[]) [0x00008] in /Users/PureKrome/Documents/Mac Projects/Foo iOS Client/Code/Foo.Client.iPhone/Main.cs:16

mono-rt:   at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object          (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

   mono-rt: 
   Native stacktrace:
  mono-rt: 
   =================================================================
    Got a SIGSEGV while executing native code. This usually indicates
    a fatal error in the mono runtime or one of the native libraries 
        used by your application.
        =================================================================

@interface ViewController ()


@property (nonatomic, strong) UILabel *myLabel;



@implementation ViewController

- (IBAction)myButton:(id)sender 
{ 
  _myLabel.Text = @"Hello World ";
}
@end

mono-rt:   at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

@interface AuthenticationViewController : UIViewController {
    UIButton *_Google; 
}

@property (nonatomic, retain) IBOutlet UIButton *Google;

@interface AuthenticationViewController : UIViewController 
@property (nonatomic, retain) IBOutlet UIButton *Google;