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我有另一个与绑定相关的问题(绑定问题:在绑定类调用基础方法调用覆盖方法。导致无限递归),它已经变得难以处理,所以我想我会从一个包含最好的新问题开始我目前知道的信息。

我正在尝试在 MonoTouch 中进行的项目中使用 Cordova。我一直在为 Cordova 制作绑定。

这是我对 Cordova 2.4.0 类的绑定(可在此处获取https://github.com/apache/cordova-ios/tree/2.4.0/CordovaLib/Classes):(请注意,这不是一个完整的绑定,只是到目前为止我需要的作品

interface CDVScreenOrientationDelegate {
    [Export ("supportedInterfaceOrientations")]
    uint SupportedInterfaceOrientations ();

    [Export ("shouldAutorotateToInterfaceOrientation:")]
    bool ShouldAutoRotateToInterfaceOrientation (UIInterfaceOrientation interfaceOrientation);

    [Export ("shouldAutorotate")]
    bool ShouldAutoRotate ();
}

[BaseType (typeof (UIViewController))]
interface CDVViewController : CDVScreenOrientationDelegate {
    [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 orientation);

    [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);
}

[BaseType (typeof(NSObject))]
interface CDVWhitelist {
    [Export ("whitelist")]
    NSArray Whitelist { get; }

    [Export ("expandedWhitelist")]
    NSArray ExpandedWhitelist { get; }

    [Export ("allowAll")]
    bool AllowAll { get; }

    [Export ("initWithArray:")]
    IntPtr Constructor (NSArray array);

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

    [Export ("schemeIsAllowed:")]
    bool SchemeIsAllowed (string scheme);

    [Export ("errorStringForURL:")]
    string ErrorStringForUrl (NSUrl url);
}

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

    [Export ("viewController")]
    UIViewController ViewController { get; set; }

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

    [Export ("hasPendingOperation")]
    bool HasPendingOperation { get; }

    [Export ("initWithWebView:")]
    CDVPlugin InitWithWebView (UIWebView theWebView);

    [Export ("handleOpenURL:")]
    void HandleOpenUrl (NSNotification notification);

    [Export ("onAppTerminate")]
    void OnAppTerminate ();

    [Export ("onMemoryWarning")]
    void OnMemoryWarning ();

    [Export ("onReset")]
    void OnReset ();

    [Export ("appDelegate")]
    NSObject AppDelegate ();
}

这是使用来自Monotouch Binding Syntax For Protocols的 miguel.de.icaza 协议。这没有 CDVViewController 也采用的 UIWebViewDelegate

@interface CDVViewController : UIViewController <UIWebViewDelegate, CDVScreenOrientationDelegate>{
    @protected
    CDVCommandDelegateImpl* _commandDelegate;
    @protected
    CDVCommandQueue* _commandQueue; 
    NSString* _userAgent;
}

或者,我发现 Rolf Bjarne Kvinge 在http://monotouch.2284126.n4.nabble.com/Objective-C-protocol-binding-method-not-invoked-td4105828.html推荐 Adopts 语法。不幸的是,我无法使其正常工作,因为当我尝试构建绑定时,它会抱怨无法System.Type符合String. 这是一个不同的问题。

当我尝试继承 CDVViewController 时,我遇到了其他问题。具体在调用 ViewDidLoad 后,系统调用我的子类'ShouldAutoRotateToInterfaceOrientation

为了确认这一点,我做了以下事情:

public class WebViewController : CDVViewController
{
    public override bool ShouldAutoRotateToInterfaceOrientation (MonoTouch.UIKit.UIInterfaceOrientation interfaceOrientation)
    {
        Console.WriteLine ("Enter ShouldAutoRotateToInterfaceOrientation");
        var output = base.ShouldAutoRotateToInterfaceOrientation;
        Console.WriteLine ("Leave ShouldAutoRotateToInterfaceOrientation");
        return output;
    }
}

我在 中放了一个断点ShouldAutoRotateToInterfaceOrientation,当我沿着方法前进时,当我到达 时base.ShouldAutoRotateToInterfaceOrientation,它只是跳回到这个方法的开头,我的调用堆栈现在已经添加了Cordova.CDVViewController.ShouldAutoRotateToInterfaceOrientation,但是查看这个方法的源代码(可在此处获得),它从不尝试调用自身或子类实现。相反,它在内部调用supportsOrientation:,它检查一个数组以查看是否支持此方向。

无论如何,我知道supportsOrientation:最终会调用它,我也尝试从它调用它ShouldAutoRotateToInterfaceOrientation,但后来我只是在该方法中得到了奇怪的回调行为。

如果我直接实例化CDVViewController,那么一切似乎都按预期工作,但我需要为我的项目重写一些方法。当我扩展CDVViewController时,这种行为开始发生。

我对此感到很困惑,我无法弄清楚我做错了什么,所以任何帮助将不胜感激。

更新 #1根据 Rolf 的要求,这里是生成的类。我希望这就是你要找的。出于空间原因,我将其添加为 Gist 此处https://gist.github.com/innopal/5288047

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1 回答 1

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正如 Rolf 所指出的,这个问题的解决方案是我-e在我的论点中包含了标志。

如帮助中所述btouch

-e  Generates smaller classes that cannot be subclassed (previously called 'external mode').

所以这里的问题是我在不知不觉中使用了一个专门使类不可子类化的标志,然后尝试对它们进行子类化。

于 2013-06-04T23:23:02.560 回答