context.ViewData(key,value) and ViewLayout(layout) http://support.iris-go.com/d/27-using-middleware-to-inject-properties-for-templates/3

Nothing that you couldn't do before.


Former-commit-id: 658ec25d8045d25a76f87c8f992e67e64006e287

_examples/intermediate/view/context-view-data/main.go

@@ -0,0 +1,58 @@
+// this example will show you how you can set per-request data for a template outside of the main handler which calls
+// the .Render, via middleware.
+//
+// Remember: .Render has the "binding" argument which can be used to send data to the template at any case.
+package main
+
+import (
+	"time"
+
+	"gopkg.in/kataras/iris.v6"
+	"gopkg.in/kataras/iris.v6/adaptors/httprouter"
+	"gopkg.in/kataras/iris.v6/adaptors/view"
+)
+
+const (
+	DefaultTitle  = "My Awesome Site"
+	DefaultLayout = "layouts/layout.html"
+)
+
+func main() {
+	app := iris.New()
+	// output startup banner and error logs on os.Stdout
+	app.Adapt(iris.DevLogger())
+	// set the router, you can choose gorillamux too
+	app.Adapt(httprouter.New())
+	// set the view engine target to ./templates folder
+	app.Adapt(view.HTML("./templates", ".html").Reload(true))
+
+	app.UseFunc(func(ctx *iris.Context) {
+		// set the title, current time and a layout in order to be used if and when the next handler(s) calls the .Render function
+		ctx.ViewData("Title", DefaultTitle)
+		now := time.Now().Format(app.Config.TimeFormat)
+		ctx.ViewData("CurrentTime", now)
+		ctx.ViewLayout(DefaultLayout)
+
+		ctx.Next()
+	})
+
+	app.Get("/", func(ctx *iris.Context) {
+		ctx.ViewData("BodyMessage", "a sample text here... setted by the route handler")
+		if err := ctx.Render("index.html", nil); err != nil {
+			app.Log(iris.DevMode, err.Error())
+		}
+	})
+
+	app.Get("/about", func(ctx *iris.Context) {
+		ctx.ViewData("Title", "My About Page")
+		ctx.ViewData("BodyMessage", "about text here... setted by the route handler")
+
+		// same file, just to keep things simple.
+		if err := ctx.Render("index.html", nil); err != nil {
+			app.Log(iris.DevMode, err.Error())
+		}
+	})
+
+	// Open localhost:8080 and localhost:8080/about
+	app.Listen(":8080")
+}