c# - 无法将 `object' 表达式转换为类型 `MonoTouch.Foundation.NSObject'

Question

我开始了一个新的 MonoTouch 项目。我打开了 Interface Builder 并创建了一个按钮和 socket 。我把按钮连接到 socket 上。我保存了 XIB，然后返回到 MonoDevelop 并尝试构建项目。我在生成的 XIB Designer 文件中遇到错误。错误是:

Error CS1502: The best overloaded method match for `MonoTouch.Foundation.NSObject.SetNativeField(string, MonoTouch.Foundation.NSObject)' has some invalid arguments (CS1502) (Test2)Error CS1503: Argument `#2' cannot convert `object' expression to type `MonoTouch.Foundation.NSObject' (CS1503) (Test2)

This is the property is created:

#pragma warning disable 0169
    [MonoTouch.Foundation.Connect("window")]
    private object window {
        get {
            this.__mt_window = ((object)(this.GetNativeField("window")));
            return this.__mt_window;
        }
        set {
            this.__mt_window = value;
            this.SetNativeField("window", value);
        }
    }

有什么想法吗？

Answer 1

确保您使用的是最新(和匹配)版本的工具。
例如，MonoTouch installation page列出了最新版本的以下要求:

• XCode 3.2.6 and iOS 4.3 SDK
• Mono framework 2.10.3 for Mac OS X - Intel Runtime
• MonoDevelop IDE 2.4.2 or above