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 the 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, wherein touch points on the slidable trajectory correspond to a plurality of pages to be displayed respectively, wherein, the changing the corresponding first trajectory on the slidable trajectory to a second trajectory according to the re-determined current touch point comprising: changing the first trajectory with straight-line appearance on the slidable trajectory to the second trajectory with curved-line or folded-line appearance according to the re-determined current touch point, wherein, the changing the first trajectory with straight-line appearance on the slidable trajectory to the second trajectory with curved-line or folded-line appearance according to the re-determined current touch point comprising: determining parameter values of a first pre-determined function according to a location of the re-determined current touch point and a location of a first end point of the first trajectory; determining a portion of the second trajectory between the re-determined current touch point and the first end point according to the first pre-determined function; determining parameter values of a second pre-determined function according to the location of the re-determined current touch point and a location of a second end point of the first trajectory; and determining an other portion of the second trajectory between the re-determined current touch point and the second end point according to the second pre-determined function; wherein, each of the function type of the first pre-determined function and the second pre-determined function is any one chosen from the group of linear function, parabola function, n-th power function, index function and trigonometric function.