MonoTouch-访问Obj-C常量

本文介绍了MonoTouch-访问Obj-C常量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 很多时候，我会阅读Obj-C代码，并需要其中一个常量的值出现在其中一个Obj-C头文件中。Many times I'll read Obj-C code and need the value to one of their constants present in one of the Obj-C header files.用于通知，我已经能够在MonoTouch中找到它们，例如 UIApplication.DidEnterBackgroundNotification 。For notifications, I've been able to find them in MonoTouch such as UIApplication.DidEnterBackgroundNotification.是否存在标准方法获得这样的价值？由于某种奇怪的原因，我需要查找 UINavigationControllerHideShowBarDuration 。Is there a standard way to get such values? I am needing to lookup UINavigationControllerHideShowBarDuration for an odd reason.推荐答案 UINavigationControllerHideShowBarDuration 是 CGFloat ，MonoTouch映射到.NET System.Single （ float （在C＃中）。UINavigationControllerHideShowBarDuration is a CGFloat, which MonoTouch maps to a .NET System.Single (float in C#).您应该可以使用 MonoTouch.ObjCRuntime.Dlfcn.GetFloat 方法，以获取 constant 值（它可以在版本之间进行更改，不应像C＃ const 那样嵌入）运行。例如，You should be able to use MonoTouch.ObjCRuntime.Dlfcn.GetFloat method to retrieve the constant (it could change between versions and should not be embedded like a C# const) value at runtime. E.g.IntPtr handle = Dlfcn.dlopen (Constants.UIKitLibrary, 0);return Dlfcn.GetFloat (handle, "UINavigationControllerHideShowBarDuration"); 这篇关于MonoTouch-访问Obj-C常量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！