INExtension.GetHandler(INIntent) 方法

定义

命名空间:

Intents

程序集:

Xamarin.iOS.dll

开发人员重写此方法以返回处理程序对象（如果 intent 是其扩展可以响应的对象）。

[Foundation.Export("handlerForIntent:")]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.iOS, 10, 0, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Introduced(ObjCRuntime.PlatformName.WatchOS, 3, 2, ObjCRuntime.PlatformArchitecture.All, null)]
[ObjCRuntime.Unavailable(ObjCRuntime.PlatformName.MacOSX, ObjCRuntime.PlatformArchitecture.All, null)]
public virtual Foundation.NSObject GetHandler (Intents.INIntent intent);

abstract member GetHandler : Intents.INIntent -> Foundation.NSObject
override this.GetHandler : Intents.INIntent -> Foundation.NSObject

参数

intent

INIntent

INIntent系统收到的 。

返回

NSObject

开发人员的处理程序对象或 null （如果 intent 不是由扩展处理的话）。

实现

GetHandler(INIntent)

属性

ExportAttribute IntroducedAttribute UnavailableAttribute

注解

开发人员的处理程序对象必须实现 IIN{Intent}Handling 适合 () 此方法返回处理程序的 类型的 INIntent 接口。 例如：

class MyExtension : INExtension
{
    override public NSObject GetHandler (INIntent intent)
    {
        if (intent is INSendMessageIntent)
        {
            return new MySendMessageHandler ();
        }
        return null;
    }
}

class MySendMessageHandler : NSObject, IINSendMessageIntentHandling
{
    public void HandleSendMessage (INSendMessageIntent intent, Action<INSendMessageIntentResponse> completion)
    {
        // ... Send a message here ...

        var activity = new NSUserActivity (nameof (INSendMessageIntent));
        var response = new INSendMessageIntentResponse (INSendMessageIntentResponseCode.Success, activity);
        completion (response);
    }
}