Quote:
Originally Posted by Ralph Sir Edward
How would I know that meant to slide a finger in a particular direction? When I couldn't even see anything to slide to in that direction? (If it'd flashed out in one direction, that would have been intuitive...)
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Part of the reason is patents.
Apple own a patent on slide-to-unlock, where you slide along a straight path that is shown on the screen. (The actual details are more complicated than that.)
This is why other devices have more complicated slide-to-unlock systems.