Golang安装iris

安装iris时由于一些依赖包需要翻墙很可能导致安装不成功，解决办法如下

1.打开CMD命令提示框，设置临时环境变量（只在当前cmd窗口可用，设置环境变量永久解决）
set GO111MODULE=on
set GOPROXY=https://goproxy.io
注意 https://goproxy.io 也可替换成阿里云的 https://mirrors.aliyun.com/goproxy

go get -u github.com/kataras/iris

请用go env来查看GOPATH路径，具体安装位置，GOPATH/pkg/mod 目录中

在安装过程中可能会报如下错误：

go\pkg\mod\github.com\kataras\iris@v0.0.2\view\blocks.go:76:37: undefined: block
s.AssetFunc
go\pkg\mod\github.com\kataras\iris@v0.0.2\view\blocks.go:76:66: undefined: block
s.AssetNamesFunc
go\pkg\mod\github.com\kataras\iris@v0.0.2\view\blocks.go:77:10: s.Engine.Assets
undefined (type *blocks.Blocks has no field or method Assets)

解决办法: go get github.com/kataras/iris/v12@master
问题地址： https://github.com/kataras/iris/issues/1646