ios - SpriteKit - How can I catch the event when the touch moves over a sprite, but didn't actually begin on the sprite -

in spritekit, want catch event when touch moves on sprite, hasn't started on sprite, on piece of skscene.

i can catch touchesbegan inside skspritenode if touch starts on , dragged on it, not when touch started on node - b - , dragged on node - a. knows how catch one, because think doing wrong here.

try this: sorry swift.. can same thing in obj c

import spritekit  class gamescene: skscene {      let sprite = skspritenode(color: skcolor.redcolor(), size: cgsizemake(100, 100))     var startedoutsidesprite = true      override init(size: cgsize) {         super.init(size: size)         sprite.position = cgpointmake(size.width/2, size.height/2)         addchild(sprite)     }      override func touchesbegan(touches: set<uitouch>, withevent event: uievent?) {         if let touch = touches.first {             let location = touch.locationinnode(self)             if !sprite.containspoint(location) {                 startedoutsidesprite = true             }         }     }      override func touchesmoved(touches: set<uitouch>, withevent event: uievent?) {         if let touch = touches.first {             let location = touch.locationinnode(self)              if sprite.containspoint(location) && startedoutsidesprite {                 print("yayyy")                 // code here             }         }     }      override func touchesended(touches: set<uitouch>, withevent event: uievent?) {         startedoutsidesprite = false     }      required init?(coder adecoder: nscoder) {         fatalerror("init(coder:) has not been implemented")     } }