1. A method of sliding control at a screen of a hand-held apparatus, comprising: displaying, on the screen, a slidable trajectory containing a current touch point in connection with a control of an application in the hand-held apparatus; detecting a trigger signal corresponding to a touch or non-touch operation being applied to the slidable trajectory on the screen; upon detection of the trigger signal, re-determining a current touch point; and changing a corresponding first trajectory on the slidable trajectory to a second trajectory according to the re-determined current touch point and displaying the second trajectory on the screen; wherein, the first trajectory is entire or part of the slidable trajectory, the length of the second trajectory is longer than that of the first trajectory.