Oh Hashmir, Multi-Touch Me Down There

We've already established that finger prints and smudges on the screen are a non issue when the device is on, now the question is: how well does the interface work?

Apple's idea behind the iPhone's multi-touch interface is that mobile phones can't work with a fixed input device.  Mobile phones have to be incredibly compact, yet these days they have to run a variety of applications: everything from writing emails to planning routes in Google Maps to organizing your photos.  To make things worse, the ideal interface for inputting an address is wildly different from the ideal interface for viewing pictures. 

A fixed keyboard is great for writing emails (e.g. Blackberry), but you need the equivalent of a mouse for scrolling around webpages on a small screen.  The stylus is a nice attempt at a mobile mouse but it's redundant, your fingers are just as capable of pointing as a plastic pen. 

The multi-touch screen on the iPhone fundamentally works like most other touch screens, with the exception that it allows multiple simultaneous inputs on the screen.  Much like Apple's approach in OS X, the iPhone's multi-touch interface works the way you'd expect it to. 

If you want to hit a button, simply tap on it.  If you want to zoom in on a picture or web page, double tap on it (double tap once more to zoom out).  To scroll around tap and hold your finger in one place then drag it around. 

Scrolling through long lists is done by flicking your finger up or down; place your finger on the screen then drag it up to scroll down and vice versa.  The motion takes seconds to master and it's quite intuitive. 

Flipping through multiple "tabs" in Safari or pictures in the iPhone's photo albums is just as easy as scrolling.  Instead of flicking your finger from top to bottom, simply move it from left to right as if you were flipping through pages of a book. 

By far my favorite gesture is used when quickly deleting items in a list.  If you want to delete an email for example, just strike through the email with your finger from left to right, a delete icon appears and selecting it will delete the email.  It's the smoothest way I've ever deleted anything.

The more advanced features involve two fingers, I found myself using my index finger and thumb but technically you could use any two of your digits.  Aside from the double tap (which may not work depending on the situation), you can zoom in on an image by taking your index finger and thumb and making a stretching motion with them on the screen.  Hold your thumb and index finger together, place them on the screen, then pull them apart while maintaining contact with the screen.  You'll zoom in on the area you just stretched.  To achieve the opposite effect, just reverse the motion by pinching your fingers together. 

You do have to be firm with your touches, and you can't use your fingernails (or gloves).  At the same time, the multi-touch screen works best if your hands are clean and dry; if you've got oily skin, plan on washing your hands a lot to get the best experience with the iPhone.  If your hands aren't clean/dry you'll find that the gestures don't always react exactly how you'd like them to, the device is still usable but there's a measurable difference between using it with clean/dry hands vs. oily hands. 

When the iPhone's CPU isn't busy downloading mail or rendering a web page, the pinch/stretch works flawlessly, as do all of the gestures mentioned above.  The only time you'll encounter choppy response is if a "heavy" task is still being executed in the background. 

The iPhone is usable in one of two orientations: portrait or landscape.  There's an integrated silicon mass sensor that detects, based on the gravitational pull on the device, whether it is being held in portrait or landscape mode. 

Switching between portrait and landscape mode is, for the most part, as seamless as it is in the TV commercials.  Not all applications support landscape mode (e.g. iPhone Mail only works in portrait mode) while the playing videos in the YouTube app works exclusively in landscape.  In order for the iPhone's internal sensor to best gauge its orientation, you'll want to hold the device as close to perpendicular to the ground as possible when rotating. 

I have seen some quirks where the iPhone's scheduler is unable to immediately interrupt a task as I rotate the phone, causing a multi-second pause between when I rotate the phone and when the screen switches orientation.

Mobile phone interfaces are often unreasonably sluggish, and it's clear that Apple set out to fix that with the iPhone.  The OS will do whatever it takes to preserve the responsiveness of the UI; for example, if you have a long email that you scroll through quickly, the iPhone may not have all of the email present in its frame buffer given the limited amount of memory on the device (possibly 128MB).  If you scroll too far down in the email too quickly, you'll be greeted with a checkerboard pattern while the email gets moved into the display buffer.  However, while this is happening, the UI never behaves any differently - it's still as responsive as when scrolling through data that's present in the display buffer. 


Scroll too far ahead and you'll get this before the display buffer gets the data it needs; the iPhone is fast, but you're still faster.

I suspect that future versions of the iPhone with more memory and a faster processor won't have this issue, but Apple made do with what was available at the time.  

For navigating through the basic iPhone interface, selecting applications, toggling settings, scrolling, zooming, etc..., the multi-touch screen works flawlessly.  Being able to re-orient the display from portrait to landscape mode on the fly with virtually no interruption in the user experience is beyond impressive.  It truly feels like something out of a sci-fi movie and it's one of the most understated but impressive features of the iPhone.  The interface just works.

Simplicity Perfected The Keyboard
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  • Locutus465 - Wednesday, July 04, 2007 - link

    Fortunetly by law every new phone activated as of 2005 must have built in GPS for E-911.. Just one small baby step from there repurposes that GPS for coolness... My i720 allows this. Reply
  • strikeback03 - Thursday, July 05, 2007 - link

    Doesn't the law simply require the carrier to be able to determine the location of the phone, but not specify how? Allowing the carriers to determine by distance to cell towers instead of GPS? Reply
  • Locutus465 - Thursday, July 05, 2007 - link

    I beleive GPS is required... At least this is what I was told by a Verizon rep that refused to activate an older phone I had. Reply
  • Cygni - Thursday, July 05, 2007 - link

    GPS is not required by law, yet. Location support IS required, but is already present on nearly every phone made in the last 3 years. Reply
  • plinden - Tuesday, July 03, 2007 - link

    quote:

    Complete lack of 3rd party software support?


    Leo Laporte in one of his podcasts this weekend mentioned that he heard there is an SDK for the iPhone that's ready for OS X but not Windows, but Apple (ie Jobs) wants to release both versions at the same time, hence the delay.

    That's just a rumor, but it's almost certain there'll be an SDK at some point, although it's extremely likely, if not certain, that developers will have to go through Apple to get their apps published to the iPhone (ie via iTunes).

    Give it six months, like I'm doing. I'll likely get the 16GB version with 3G when it's available.
    Reply
  • Locutus465 - Tuesday, July 03, 2007 - link

    There will need to be good 3rd party support for me to even consider it. There'll also need to be a good (and inexpensive) all in one chat client. And Mahjoong, that's totally a requirement. Reply
  • sviola - Tuesday, July 03, 2007 - link

    You should check the Nokia N95, it has the built-in GPS, altough it runs Symbian OS. Reply
  • Locutus465 - Tuesday, July 03, 2007 - link

    Well yes, my phone has built in GPS hardware as well (as do all phone inc. iPhone). It's just missing the app + maps (unless you're sayind the nokia comes with software + maps which would be the bomb). So I would just need that part of the equation. As a matter of fact the Samsung i720 also allows you to use the phone as a plain old GPS device, so really if I wanted to I could potentially blue tooth it to a laptop for instance and go that route. Reply
  • Locutus465 - Tuesday, July 03, 2007 - link

    Oh yeah, on the i720 to set an MP3 as your ring tone you just need to browse to it in flie explorer, tap and hold ("right click" in Windows Mobile) and select "Set as ringtone" :)

    Automatically copies to \Windows\Rings and sets the song as your ringtone :D
    Reply
  • CaptainDDL - Monday, July 02, 2007 - link

    Could you take a picture of what the iPhone shows when you're trying to connect to a secure Wi-Fi connection? Thanks. Reply

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