WebClient FileDownload exception in iOS - NotSupportedException: The URI prefix is not recognized.

Questions & Answers
1

Unity: 2017.1.0f3

Target platform: iOS 10.3

Target device: iPhone 6s

When I used unity 5.6, WebClient.DownloadFile code is fine.

But Unity 2017, WebClient.DownloadFile code occur exceptions below only iOS platform.

NotSupportedException: The URI prefix is not recognized.
at System.Net.WebRequest.Create (System.Uri requestUri, System.Boolean useUriBase) [0x00000] in <00000000000000000000000000000000>:0
at System.Net.WebRequest.Create (System.Uri requestUri) [0x00000] in <00000000000000000000000000000000>:0
at System.Net.WebClient.GetWebRequest (System.Uri address) [0x00000] in <00000000000000000000000000000000>:0
at System.Net.WebClient.DownloadDataInternal (System.Uri address, System.Net.WebRequest& request) [0x00000] in <00000000000000000000000000000000>:0
at System.Net.WebClient.DownloadString (System.Uri address) [0x00000] in <00000000000000000000000000000000>:0
at System.Net.WebClient.DownloadString (System.String address) [0x00000] in <00000000000000000000000000000000>:0

To fix this exceptions replace WebClient to WWW class as you know.
But I cannot find why WebClient.DownloadFile method occur exceptions.

Please tell me this exceptions.

2

API Compatibility Level: .NET 4.6 is not working
Only set to .Net 2.0 or .Net 2.0 subset working

Need to fix WebClient class in .NET 4.6 and iOS platform.

Someday maybe fix… I don’t know when fix it.

To Unity developer:
Need to work for .NET 4.6 compatibility.