technology gadgets, like the iphone, pre, and other cool devices

iPad or iPhone app won't open - solution/help alvin August 8, 2012 - 12:00am

I just ran into the craziest problem where I couldn't get any third-party apps on my iPad to open. I'd tap them, there'd be a quick blink, then nothing, I was back to the home screen with all my app icons.

iPhone and iPad JavaScript dialogs (alert, confirm, prompt) alvin November 17, 2011 - 12:36pm

iPhone JavaScript dialogs FAQ: Can I use JavaScript windows and dialogs in my iPhone HTML app (the JavaScript alert dialog, confirm dialog, and prompt dialog)?

Yes you can. According to Apple's iOS Safari web documentation, you can use "iPhone JavaScript windows and dialogs" that are supported by iOS. Here's how.

iPhone web apps - the HTML SELECT element alvin April 10, 2011 - 8:14pm

iPhone HTML/web apps FAQ: Can I use the HTML SELECT tag in my iPhone HTML web apps? If so, what does the control look like in the iPhone Mobile Safari web browser?

Yes, according to the Apple Safari web developer documentation, you can use the HTML SELECT tag in your iPhone HTML/web apps.

iPhone Safari debugging console (iPhone/iPad web app debugging) alvin April 10, 2011 - 8:06pm

iPhone HTML web app debugging - I'm trying to optimize my HTML/web application to look and feel like a native iPhone app; how can I debug my web app on an iPhone or iPad (presumably using Safari)?

iPhone user agent - Use JavaScript to detect the user agent alvin April 10, 2011 - 7:59pm

iPhone 'user agent' FAQ: I'm trying to optimize my HTML/web app for the iPhone; how do I detect an iPhone, iPod, or iPad browser in my web application?

This Apple page shows the iPhone, iPod, and iPad user agent strings, so you just need to write some JavaScript that properly parses those iPhone/iPad browser user agent strings.

iPhone HTML apps - Conditional iPhone style sheets alvin April 10, 2011 - 7:54pm

iPhone HTML web app style sheets FAQ: I'm trying to optimize my HTML/web app for the iPhone, how do I specify a style sheet to be used for just the iPhone?

There are several different approaches you can take, but with CSS3 the most direct approach you can take is to add an expression to your iPhone CSS link tag, as shown here:

iPhone HTML apps - Using an app startup image (app splash screen) alvin April 10, 2011 - 7:46pm

iPhone HTML apps startup image FAQ: How do I set the startup image (splash screen) for my iPad or iPhone HTML app?

This quick blurb from the Apple developer documentation leads us to the answer:

On iOS, similar to native applications, you can specify a startup image that is displayed while your web application launches. This is especially useful when your web application is offline.

By default, a screenshot of the web application the last time it was launched is used. To set another startup image, add a "link" element to the webpage.

Setting an iPhone HTML/web app icon | iPhone app home screen icon alvin April 10, 2011 - 7:39pm

iPhone HTML app icon FAQ: I'm creating an iPhone HTML web app, and I want users to be able to save my HTML app icon to their iPhone home screen; how can I add a custom iPhone app icon to my web application?

The iPhone Mobile Safari web browser recognizes a special HTML tag that lets you add an iPhone app icon to your HTML application. Here's the syntax that lets you add an iPhone app icon to your web app: