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我正在开发一个使用 Cordova 的 MonoTouch 项目。我为 Cordova 创建了一个绑定(基于 Scott Blomquist 创建的绑定)。

我已经能够很好地实例化这些类而不会失败。但是,当我尝试扩展它们时,我遇到了问题。例如,如果我只是尝试扩展 CDVViewController,甚至不覆盖任何东西,当我们到达实例化这个扩展类的代码时,系统会安静地退出,没有错误消息,并且下面的退出行。

The program 'Mono' has exited with code 0 (0x0).
The program '[5600] ***.vshost.exe: Managed (v4.0.30319)' has exited with code -1 (0xffffffff).

这是我要实例化的类

public class WebViewController : CDVViewController
{
}

这是它背后的绑定

[BaseType (typeof (UIViewController))]
interface CDVViewController {
    [Export ("webView")]
    UIWebView WebView { get; set; }

    [Export ("pluginObjects")]
    NSMutableDictionary PluginObjects { get; }

    [Export ("pluginsMap")]
    NSDictionary PluginsMap { get; }

    [Export ("settings")]
    NSDictionary Settings { get; }

    [Export ("whitelist")]
    CDVWhitelist Whitelist { get; }

    [Export ("loadFromString")]
    bool LoadFromString { get; }

    [Export ("useSplashScreen")]
    bool UseSplashScreen { get; set; }

    [Export ("activityView")]
    UIActivityIndicatorView ActivityView { get; }

    [Export ("imageView")]
    UIImageView ImageView { get; }

    [Export ("wwwFolderName")]
    string WwwFolderName { get; set; }

    [Export ("startPage")]
    string StartPage { get; set; }

    [Export ("commandQueue")]
    NSObject CommandQueue { get; set; }

    [Export ("commandDelegate")]
    NSObject CommandDelegate { get; set; }

    [Export ("userAgent")]
    string UserAgent { get; }

    [Export ("printMultitaskingInfo")]
    void PrintMultitaskingInfo ();

    [Export ("createGapView")]
    void CreateGapView ();

    [Export ("newCordovaViewWithFrame:")]
    UIWebView NewCordovaView(RectangleF bounds);

    [Export ("javascriptAlert:")]
    void JavascriptAlert (string text);

    [Export ("appURLScheme")]
    string AppUrlScheme ();

    [Export ("parseInterfaceOrientations:")]
    NSArray ParseInterfaceOrientations (NSArray orientations);

    [Export ("supportsOrientation:")]
    bool SupportsOrientation (UIInterfaceOrientation orientations);

    [Export ("getCommandInstance:")]
    NSObject GetCommandInstance (string pluginName);

    [Export ("registerPlugin:withClassName:")]
    void RegisterPluginWithClassName (CDVPlugin plugin, string className);

    [Export ("URLisAllowed:")]
    bool UrlIsAllowed (NSUrl url);

    [Static] [Export ("getBundlePlist:")]
    NSDictionary GetBundlePlist (string plistName);

    [Static] [Export ("applicationDocumentsDirectory")]
    string ApplicationDocumentsDirectory ();

    // The following methods and properties come from UIWebViewDelegate, but we can't do multiple inheritance
    [Export ("webView:shouldStartLoadWithRequest:navigationType:")]
    bool ShouldStartLoad (UIWebView webView, NSUrlRequest request, UIWebViewNavigationType navigationType);
}

我为其构建绑定的CDVViewController.h在此处获得

任何人都可以提供的任何帮助将不胜感激。

更新 #1 这似乎是由分段错误引起的。对于遇到这种情况的其他人,如果您进入 Mac 并检查日志,您可能会发现相同的情况。您可以通过打开终端并输入来执行此操作,tail -f /var/log/system.log因为这显然是模拟器日志所在的位置。

在我的日志中,我发现了以下内容。***用于编辑应用程序名称。

Mar 28 16:51:16 macmini1 com.apple.launchd.peruser.55385368[409] (UIKitApplication:com.***.***[0x5ef3][14219]): Job appears to have crashed: Segmentation fault: 11
Mar 28 16:51:16 macmini1 SpringBoard[516]: Application '***' exited abnormally with signal 11: Segmentation fault: 11
Mar 28 16:51:16 macmini1 ReportCrash[14132]: Saved crash report for ***[14219] version ??? (???) to /Users/jstarke/Library/Logs/DiagnosticReports/***_2013-03-28-165116_macmini1.crash
Mar 28 16:51:16 macmini1 ReportCrash[14132]: Removing excessive log: file://localhost/Users/jstarke/Library/Logs/DiagnosticReports/***_2013-03-28-135722_macmini1.crash

更新 #2 我发现了上面提到的崩溃报告。这是最新的崩溃报告信息,包括崩溃的线程

Process:         *** [29880]
Path:            /Users/*/Library/Application Support/iPhone Simulator/*/***.app/***
Identifier:      ***
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  launchd [409]

Date/Time:       2013-03-29 11:44:48.882 -0700
OS Version:      Mac OS X Server 10.7.5 (11G63)
Report Version:  9

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000bf7fff7c

VM Regions Near 0xbf7fff7c:
    Stack                  00000000b050b000-00000000b052c000 [  132K] rw-/rwx SM=COW  
--> Stack                  00000000bc000000-00000000bf800000 [ 56.0M] ---/rwx SM=NUL  
    Stack                  00000000bf800000-00000000c0000000 [ 8192K] rw-/rwx SM=COW  

Application Specific Information:
iPhone Simulator 358.4, iPhone OS 6.0 (iPhone/10A403)


Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_c.dylib             
0x954d458c szone_malloc_should_clear + 12
1   libsystem_c.dylib             
0x954d566b szone_malloc + 24
2   libsystem_c.dylib             
0x9550b962 malloc_zone_malloc + 77
3   libsystem_c.dylib             
0x9550c882 malloc + 50
4   libobjc.A.dylib               
0x041985c9 class_copyProtocolList + 157
5   CoreFoundation                
0x03f72962 __methodDescriptionForSelector + 178
6   CoreFoundation                
0x03fe65a3 -[NSObject(NSObject) methodSignatureForSelector:] + 51
7   ***                  
0x00254352 monotouch_trampoline + 82
8   ???                           
0x16c4ab0b 0 + 381987595
9   ???                           
0x16c7428c 0 + 382157452
10  ???                           
0x16c743dc 0 + 382157788
11  ***                  
0x0004cf22 mono_jit_runtime_invoke + 722
12  ***                  
0x001b03fe mono_runtime_invoke + 126
13  ***                  
0x00255166 monotouch_trampoline + 3686

Lines 8 - 13 repeat a large number of times (no additional information)

506 ???                           
0x16c4ab0b 0 + 381987595
507 ???                           
0x16c7428c 0 + 382157452
508 ???                           
0x16c743dc 0 + 382157788
509 ***
0x0004cf22 mono_jit_runtime_invoke + 722
510 ***                  
0x001b03fe mono_runtime_invoke + 126
511 ***                  
0x00255166 monotouch_trampoline + 3686

更新#3 为了获得更多信息,我决定在本地 WebViewController 中覆盖 CDVViewController 中的所有方法,然后从每个方法的基本等效项返回值,并在方法上设置断点,然后放一个 Console.WriteLine 说我们进入和退出了每个方法。

令我惊讶的是, Update #2中许多重复的原因与这样一个事实有关,即当WebViewController.ShouldAutoRotateToInterfaceOrientation被调用时,我们调用了基类CDVViewController.ShouldAutoRotateToInterfaceOrientation,而基类显然又调用了WebViewController.ShouldAutoRotateToInterfaceOrientation,等等。

查看我正在使用的 Cordova 版本的源代码(此处),shouldAutorotateToInterfaceOrientation:会调用supportsOrientation:,它会从NSArray.

我看不出有什么理由CDVViewController.ShouldAutoRotateToInterfaceOrientation应该打电话WebViewController.ShouldAutoRotateToInterfaceOrientation。Xamarin 或 Cordova 社区中的任何人有任何想法吗?

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1 回答 1

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如果其他人遇到与 Bindings 相关的类似问题,由于 Rolf Bjarne Kvinge 的建议,我设法得到了这个工作(绑定问题:扩展类导致方法调用自身?

事实证明,我正在使用的一个标志(没有真正理解它做了什么)应该为此负责。使用标志生成 DLLbtouch时。-eGenerates smaller classes that can not be subclassed

删除它可能会解决您的问题,就像对我一样。

于 2013-04-02T16:00:35.523 回答