add quicktemplate example. Iris + Quicktemplate made easy 👍

Former-commit-id: b17fb21d8c1d5a73f9f9170f49ae0527870377a1

_examples/http_responsewriter/quicktemplate/controllers/hello.go

@@ -0,0 +1,30 @@
+package controllers
+
+import (
+	"github.com/kataras/iris/_examples/http_responsewriter/quicktemplate/templates"
+
+	"github.com/kataras/iris/context"
+)
+
+// Hello renders our ../templates/hello.qtpl file using the compiled ../templates/hello.qtpl.go file.
+func Hello(ctx context.Context) {
+	// vars := make(map[string]interface{})
+	// vars["message"] = "Hello World!"
+	// vars["name"] = ctx.Params().Get("name")
+	// [...]
+	// &templates.Hello{ Vars: vars }
+	// [...]
+
+	// However, as an alternative, we recommend that you should the `ctx.ViewData(key, value)`
+	// in order to be able modify the `templates.Hello#Vars` from a middleware(other handlers) as well.
+	ctx.ViewData("message", "Hello World!")
+	ctx.ViewData("name", ctx.Params().Get("name"))
+
+	// set view data to the `Vars` template's field
+	tmpl := &templates.Hello{
+		Vars: ctx.GetViewData(),
+	}
+
+	// render the template
+	ExecuteTemplate(ctx, tmpl)
+}