ℹ️ add mvc 'ByWildcard' example as requested at #1459

Although, we already had a usage of this as a test at mvc/controller_test.go#testControllerRelPathFromFunc


Former-commit-id: 66343933aa86750615ab89767f149f6636d03be7

_examples/mvc/basic/wildcard/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"github.com/kataras/iris/v12"
+	"github.com/kataras/iris/v12/mvc"
+)
+
+func main() {
+	app := iris.New()
+	usersRouter := app.Party("/users")
+	mvc.New(usersRouter).Handle(new(myController))
+	// Same as:
+	// usersRouter.Get("/{p:path}", func(ctx iris.Context) {
+	// 	wildcardPathParameter := ctx.Params().Get("p")
+	// 	ctx.JSON(response{
+	// 		Message: "The path parameter is: " + wildcardPathParameter,
+	// 	})
+	// })
+
+	/*
+		curl --location --request GET 'http://localhost:8080/users/path_segment_1/path_segment_2'
+
+		Expected Output:
+		{
+		  "message": "The wildcard is: path_segment_1/path_segment_2"
+		}
+	*/
+	app.Listen(":8080")
+}
+
+type myController struct{}
+
+type response struct {
+	Message string `json:"message"`
+}
+
+func (c *myController) GetByWildcard(wildcardPathParameter string) response {
+	return response{
+		Message: "The path parameter is: " + wildcardPathParameter,
+	}
+}