That seems like a difference without a distinction to me.
You slide to unlock to open a door. You slide to unlock to open your phone (or rather the "door" blocking you from accessing the content in the phone). Seems quite similar to me.
In hindsight, yes, but the fact a solution is simple does not mean that it isn't inventive. There is the possibility of invention in the use of technology from one field in another unrelated field.
You slide to unlock to open a door. You slide to unlock to open your phone (or rather the "door" blocking you from accessing the content in the phone). Seems quite similar to me.