Apple has long denied the presence of Flash on its iPhone and iPod touch, accusing battery drainage and other issues. Adobe, for its part, strove to prove that was not exactly the case, and recently announced that the upcoming Flash CS5 Professional would allow developers to write applications in Flash that were then compiled to run on the iPhone.

Nevertheless, the door to the iPhone’s resources remains locked, with Apple refusing to have Flash on the iPhone via an SDK clause. Seeing that Apple simply won’t barge, Adobe Systems, the maker of Flash, has decided to become a tad more vocal about the issue.

Previously, when a user would try to access a flash-based video on their iPhone, a message saying, “To view this content upgrade your browser and flash plug-in” would appear. Now, by visiting the iPhone version of Adobe’s Flash download page bears the following message (screenshot also available above, courtesy of geardiary.com):

“Apple restricts use of technologies required by products like Flash Player. Until Apple eliminates these restrictions, Adobe cannot provide Flash Player for the iPhone or iPod touch.”

As noted above, at Adobe’s worldwide developer conference (Adobe MAX), the Flash maker announced that Adobe Flash Professional CS5 would enable developers to create rich, interactive applications for the iPhone and iPod touch. The company showcased a series of new iPhone applications built using a beta version of Flash Professional CS5. The software is expected to include a new text engine for creative freedom and control with text, enhanced capabilities for team collaboration on projects, pre-built code snippets for rapidly adding interactivity, and integration with Adobe Flash Builder for advanced ActionScript editing.

Adobe also offered a sneak peek into how developers could use Flash Professional CS5 to export applications for the iPhone, during the MAX keynote presentation. The company thus revealed that, not only would developers be able to create native iPhone apps from the ground up using Flash, but that existing IPs could be ported as well.