Xamarin Forms UWP Missing Phone Call Manager 程序集

Question

问题

正在学习 Xamarin 大学课程 XAM120。在将我的 IDial 实现添加到我的 UWP 项目时遇到障碍。出于某种原因，我的项目没有在我的系统上获取 PhoneCallManager API。

错误：

Error CS1069
The type name 'PhoneCallManager' could not be found in the namespace 'Windows.ApplicationModel.Calls'. This type has been forwarded to assembly 'Windows.Foundation.UniversalApiContract, Version=3.0.0.0, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime' Consider adding a reference to that assembly.

代码：

using System.Threading.Tasks;
using Windows.Foundation.Metadata;
using Phoneword.UWP;
using Xamarin.Forms;

namespace Phoneword.UWP
{
    public class PhoneDialer : IDialer
    {
        public Task<bool> DialAsync(string phoneNumber)
        {
            if (ApiInformation.IsApiContractPresent("Windows.ApplicationModel.Calls.CallsPhoneContract", 1, 0))
            {
                Windows.ApplicationModel.Calls.PhoneCallManager.ShowPhoneCallUI(phoneNumber, "Phoneword");
                return Task.FromResult(true);
            }

            return Task.FromResult(false);
        }
    }
}

Answer 1

要使依赖注入在 Xamarin 中工作，您需要告诉它将您的 class 与正确的接口耦合！

因此在您的 命名空间 Phoneword.UWP 行上方

[assembly: Xamarin.Forms.Dependency (typeof (PhoneDialer))]

查看文档中的教程：https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/dependency-service/introduction/#Registration

Answer 2

不要忘记在 UWP 中启用 Phone 拨号器功能。

Answer 3

将以下引用添加到您的 UWP 项目：

Xamarin Forms UWP Missing Phone Call Manager 程序集

Xamarin Forms UWP Missing Phone Call Manager Assembly

c#

window

xamarin

xamarin.forms

xamarin.uwp