触摸移动:带事件

触摸移动时,只要触摸上有移动,就会调用TouchsMoved。如果需要所有点的数组,则每次调用TouchsMoved时都需要将它们添加到可变数组中。

- (void) touchesMoved: (NSSet *)touches withEvent:(UIEvent *)event {
    CGPoint tappedPt = [[touches anyObject] locationInView: self];
    int     xPos = tappedPt.x;
    int     yPos = tappedPt.y;
    // do something with xPos and yPos like add them to an array
}