Windows下的變更不大，主要還是bug?的修復，性能的優化，API的擴展實現。

變化最大的是在Mac上的那個Xamarin.iOS build host?。那個配對的代理軟件，消失了！！！！！！！！！！！！你他么是在逗我啊！！！！！！勞資連夜升級，熬夜找那個build host??，你他么說升級消失了！

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官方的意思是：那個代理軟件太麻煩啦，換成自動化的SSH登錄識別，MAC機器一次性開啟遠程登錄，后續的客戶機只要有對應的登錄指紋就可以連接了！！

相當于在VS中，進行了遠程登錄搭配Mac作為的服務器！！蛋疼哦！~~~

然后以Mac的管理員用戶，登錄連接MAC.....................

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由于跟以前登錄方式不一樣了，所以，只好硬著頭皮一點點的扒拉。。。

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官方原文：https://developer.xamarin.com/releases/vs/xamarin.vs_4/xamarin.vs_4.0/

https://developer.xamarin.com/guides/ios/getting_started/installation/windows/connecting-to-mac/

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那如果還想用3.0的build?host的??，請看這里：https://developer.xamarin.com/guides/ios/getting_started/installation/windows/troubleshooting/

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Xamarin 4.0

Xamarin 4.0 updates?Xamarin.iOS 9.4?and?Xamarin.Android 6.0?releases. This version also introduces the new?Xamarin Mac Agent?which replaces the old?Xamarin Build Host?with a new approach taking advantage of the built-in MacOS Remote Login feature based on SSH for a faster and more reliable connectivity.

Xcode 7.2 support

XamarinVS 4.0 now includes support for Xcode 7.2.

Xamarin Mac Agent

Our new design focuses on avoiding the pain points of the original Xamarin.iOS build host that we are no longer shipping.

Key Benefits

Simplicity and Security

• We have done away with the PIN-based Mac pairing process. The new Xamarin Mac Agent only requires that Remote Login (aka SSH) is enabled on the Mac.
• The new Connection Manager in Visual Studio will discover, authenticate, and remember your Mac. Moreover, since all communication is tunneled securely through SSH, you only have to open one, well-known port (i.e., port 22) on your router or firewall.
• There’s no longer an app to start on the Mac. If you have a compatible version of Xamarin.iOS installed, VS will automatically deploy and start the new agent.

轉載于:https://www.cnblogs.com/micro-chen/p/5230131.html

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