第三方库中的MonoTouch绑定通知

Question

我正在为IDTech CC swipers创建绑定。我已经用头撞了它好一阵子了。我被困在如何订阅由第三方库引发的事件。具体地说，我需要知道何时发生了刷卡。

//Notification identifiers used with NSNotificationCenter
//physical attachment related
extern NSString * const uniMagAttachmentNotification;
extern NSString * const uniMagDetachmentNotification;
//connection related
extern NSString * const uniMagInsufficientPowerNotification;
extern NSString * const uniMagPoweringNotification;
extern NSString * const uniMagTimeoutNotification;
extern NSString * const uniMagDidConnectNotification;
extern NSString * const uniMagDidDisconnectNotification;
//swipe related
extern NSString * const uniMagSwipeNotification;
extern NSString * const uniMagTimeoutSwipeNotification;
extern NSString * const uniMagDataProcessingNotification;
extern NSString * const uniMagInvalidSwipeNotification;
extern NSString * const uniMagDidReceiveDataNotification;
//command related
extern NSString * const uniMagCmdSendingNotification;
extern NSString * const uniMagCommandTimeoutNotification;
extern NSString * const uniMagDidReceiveCmdNotification;
//misc
extern NSString * const uniMagSystemMessageNotification;

文档说这应该是可行的：

    [Notification]
    [Field ("uniMagAttachmentNotification")]
    NSString uniMagAttachmentNotification { get; }

它不能编译。

obj/Debug/ios/magTechBinding/uniMag.g.cs(637,95): error CS0117: `MonoTouch.Constants' does not contain a definition for `magTechBindingLibrary'
obj/Debug/ios/magTechBinding/uniMag.g.cs(637,77): error CS1502: The best overloaded method match for `MonoTouch.ObjCRuntime.Dlfcn.dlopen(string, int)' has some invalid arguments
obj/Debug/ios/magTechBinding/uniMag.g.cs(637,77): error CS1503: Argument `#1' cannot convert `object' expression to type `string'

如有任何想法或帮助，我们将不胜感激！

Answer 1

尝试：

[Field ("uniMagAttachmentNotification", "__Internal")]

第二个参数告诉在哪个库中查找该字段。如果没有一个，生成器会假定你会有一个常量。

现在，由于您将链接第三方static (.a)库，因此它将成为最终可执行文件的一部分。这就是为什么必须使用__Internal作为库名(这意味着查看主可执行文件内部)。