Adobe Chief Shantanu Narayen has said that the company is trying make flash working for iPhone, though, he asserted that it’s not a easy thing.

In an interview with Bloomberg media at the Davos, Switzerland event, Shantanu said “It’s a hard technical challenge, and that’s part of the reason Apple and Adobe are collaborating,” he says. “The ball is in our court. The onus is on us to deliver.”

In the mean time, Apple co-founder Steve Jobs has maintained since nearly a year ago that the real obstacle is the nature of Flash itself.

While desktop Flash is too resource-heavy for the small processor and low memory of smartphones like the iPhone, Jobs has warned that Flash Lite is too feature-limited and doesn’t do many of the things users expect Flash to do — such as playing video on the web or showing complex animations on websites.

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