Iris 允许每个应用程序注册无限数量的视图引擎。除此之外，您还可以为每个路由组或通过中间件注册一个视图引擎！
// Register a view engine per group of routes.
adminGroup := app.Party("/admin")
adminGroup.RegisterView(iris.Blocks("./views/admin", ".html"))
func middleware(views iris.ViewEngine) iris.Handler {
return func(ctx iris.Context) {
ctx.ViewEngine(views)
ctx.Next()
}
} // Register a view engine on-fly for the current chain of handlers.
views := iris.Blocks("./views/on-fly", ".html")
views.Load()
app.Get("/", setViews(views), onFly)