Xamarin.Forms iOS Xamarin.Build.Download 对象引用未设置为对象的实例 [英] Xamarin.Forms iOS Xamarin.Build.Download Object reference not set to an instance of an object

问题描述

自从我更新了我的一些 NugetPackages 之后，我的 iOS 项目由于提到的错误而无法构建.

Since I updated some of my NugetPackages my iOS project is not building because of the mentioned error.

\.nuget\packages\xamarin.build.download\0.10.0\buildTransitive\Xamarin.Build.Download.targets(52,3): error : Object reference not set to an instance of an object

我猜是因为我将 Xamarin,Build.Download 从 0.8.0 更新到 0.10.0，但由于其他项目的依赖性，我需要新版本.

I guess its since I updated the Xamarin,Build.Download from 0.8.0 to 0.10.0 but I need the new version because of dependencys of other projects.

任何解决方案或变通方法?

Any solutions or work arounds?

推荐答案

这在 VS 2019 中发生在我身上，这是因为我试图使用使用新样式Platform All"的配置文件进行构建;苹果证书.我直接编辑了 csproj 以嵌入配置文件名称.这是我构建错误的原因.

This was happening to me in VS 2019 and it was caused by the fact I was trying to build with a provisioning profile which used a new style "Platform All" Apple Certificate. I had edited the csproj directly to embed the provisioning profile name. This was the cause of the build error for me.

解决方案是使用旧样式的Platform iOS"；Apple 证书和相关的配置文件，由项目属性选取.

Solution was to use the old style "Platform iOS" Apple Certificate and an associated provisioning profile, which is picked up by the project properties.

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