Making a game with HTML + jQuery Mobile and publishing it to Apple App Store – step 2

Some days ago I showed you the basics of an HTML game optimized for the iPhone.

Now we are going to improve the game with three exciting new features:

* Showing a splash/preloader screen
* Changing iPhone top bar appearance
* Saving data locally

To show a preloader we just need to add a line in the header of the page:

This will work only on iOS 3.0 and later, and splash.png (which you will change with any other path) is the splash image that is displayed while your web application launches, replacing the default screenshot of the web application taken the last time it was used.

Your image must have a size of 320×460 pixels.

In the following picture, on the left the picture I used, on the right how it is shown on the iPhone.

You can also change the status bar with just one line in the header:

This will work only if your app is launched in full screen mode (refer to step 1 to see how to launch a web app in full screen mode).

content attribute may have three values:

default: displays the status bar as you are used to see.

black: the status bar will have a black background.

black-translucent: the status bar is black and translucent. In this case, the web content is displayed even below the status bar, partially obscured by the status bar.

This is how my app looks before and after changing the status bar:

As you can see, the status bar is black.

To save data locally, localStorage comes into our help as it acts like a browser local database, or something like a cookie, if you prefer.

That’s why in this script:

$(document).ready(function(){
	var currentNumber = Math.floor(Math.random()*10);
	var score = 0;
	if(localStorage.topScore==undefined){
		localStorage.topScore=0;	
	}
	$("#topscore").html("Top score: "+localStorage.topScore);
	$("#number").html(currentNumber);
	$("#comment").html("Click higher or lower");
	$("#higher").live("click tap",(function(){
		var newNumber = Math.floor(Math.random()*10);
		if(newNumber >= currentNumber){
			score++;	
			if(score>localStorage.topScore){
				localStorage.topScore=score;
				$("#topscore").html("Top score: "+localStorage.topScore);
			}
			$("#comment").html("Good! score: "+score);	
		}
		else{
			$("#comment").html("Bad! score: "+score);
		}
		currentNumber = newNumber;
		$("#number").html(currentNumber);	
	}));
	$("#lower").live("click tap",(function(){
		var newNumber = Math.floor(Math.random()*10);
		if(newNumber <= currentNumber){
			score++;	
			if(score>localStorage.topScore){
				localStorage.topScore=score;
				$("#topscore").html("Top score: "+localStorage.topScore);
			}
			$("#comment").html("Good! score: "+score);	
		}	
		else{
			$("#comment").html("Bad! score: "+score);
		}
		currentNumber = newNumber;
		$("#number").html(currentNumber);
	}))
});

At lines 4-7, 14-17 and 30-33 we are using a variable called topScore saved into localStorage accessing it just like an ordinary variable.

And that’s enough for this step, no we have everything we need to create a complete game with high scores, which will be shown during next step.

Get the most popular Phaser 3 book

Through 202 pages, 32 source code examples and an Android Studio project you will learn how to build cross platform HTML5 games and create a complete game along the way.

Get the book

214 GAME PROTOTYPES EXPLAINED WITH SOURCE CODE
// 1+2=3
// 100 rounds
// 10000000
// 2 Cars
// 2048
// A Blocky Christmas
// A Jumping Block
// A Life of Logic
// Angry Birds
// Angry Birds Space
// Artillery
// Astro-PANIC!
// Avoider
// Back to Square One
// Ball Game
// Ball vs Ball
// Ball: Revamped
// Balloon Invasion
// BallPusher
// Ballz
// Bar Balance
// Bejeweled
// Biggification
// Block it
// Blockage
// Bloons
// Boids
// Bombuzal
// Boom Dots
// Bouncing Ball
// Bouncing Ball 2
// Bouncy Light
// BoxHead
// Breakout
// Bricks
// Bubble Chaos
// Bubbles 2
// Card Game
// Castle Ramble
// Chronotron
// Circle Chain
// Circle Path
// Circle Race
// Circular endless runner
// Cirplosion
// CLOCKS - The Game
// Color Hit
// Color Jump
// ColorFill
// Columns
// Concentration
// Crossy Road
// Crush the Castle
// Cube Jump
// CubesOut
// Dash N Blast
// Dashy Panda
// Deflection
// Diamond Digger Saga
// Don't touch the spikes
// Dots
// Down The Mountain
// Drag and Match
// Draw Game
// Drop Wizard
// DROP'd
// Dudeski
// Dungeon Raid
// Educational Game
// Elasticity
// Endless Runner
// Erase Box
// Eskiv
// Farm Heroes Saga
// Filler
// Flappy Bird
// Fling
// Flipping Legend
// Floaty Light
// Fuse Ballz
// GearTaker
// Gem Sweeper
// Globe
// Goat Rider
// Gold Miner
// Grindstone
// GuessNext
// Helicopter
// Hero Emblems
// Hero Slide
// Hexagonal Tiles
// HookPod
// Hop Hop Hop Underwater
// Horizontal Endless Runner
// Hundreds
// Hungry Hero
// Hurry it's Christmas
// InkTd
// Iromeku
// Jet Set Willy
// Jigsaw Game
// Knife Hit
// Knightfall
// Legends of Runeterra
// Lep's World
// Line Rider
// Lumines
// Magick
// MagOrMin
// Mass Attack
// Math Game
// Maze
// Meeblings
// Memdot
// Metro Siberia Underground
// Mike Dangers
// Mikey Hooks
// Nano War
// Nodes
// o:anquan
// One Button Game
// One Tap RPG
// Ononmin
// Pacco
// Perfect Square!
// Perfectionism
// Phyballs
// Pixel Purge
// PixelField
// Planet Revenge
// Plants Vs Zombies
// Platform
// Platform game
// Plus+Plus
// Pocket Snap
// Poker
// Pool
// Pop the Lock
// Pop to Save
// Poux
// Pudi
// Pumpkin Story
// Puppet Bird
// Pyramids of Ra
// qomp
// Quick Switch
// Racing
// Radical
// Rebuild Chile
// Renju
// Rise Above
// Risky Road
// Roguelike
// Roly Poly
// Run Around
// Rush Hour
// SameGame
// SamePhysics
// Save the Totem
// Security
// Serious Scramblers
// Shrink it
// Sling
// Slingy
// Snowflakes
// Sokoban
// Space Checkers
// Space is Key
// Spellfall
// Spinny Gun
// Splitter
// Spring Ninja
// Sproing
// Stabilize!
// Stack
// Stick Hero
// String Avoider
// Stringy
// Sudoku
// Super Mario Bros
// Surfingers
// Survival Horror
// Talesworth Adventure
// Tetris
// The Impossible Line
// The Moops - Combos of Joy
// The Next Arrow
// Threes
// Tic Tac Toe
// Timberman
// Tiny Wings
// Tipsy Tower
// Toony
// Totem Destroyer
// Tower Defense
// Trick Shot
// Tunnelball
// Turn
// Turnellio
// TwinSpin
// vvvvvv
// Warp Shift
// Way of an Idea
// Whack a Creep
// Wheel of Fortune
// Where's my Water
// Wish Upon a Star
// Word Game
// Wordle
// Worms
// Yanga
// Yeah Bunny
// Zhed
// zNumbers