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我可以在touchesMoved中检测到幻灯片动作,但我想知道如何检测幻灯片,然后检测幻灯片何时停止但手指仍然按在屏幕上?在touchesMoved中,如何检测幻灯片动作然后停止?
这里是我到目前为止的代码:
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
if(self.tutorialView.alpha != 1.0 || self.tutorialView.hidden)
{
UITouch *touch = [touches anyObject];
CGPoint gestureEndPoint = [touch locationInView:self.view];
int dx = abs(gestureStartPoint.x - gestureEndPoint.x);
int dy = -1 * (gestureEndPoint.y - gestureStartPoint.y);
if(dx > 20) {
// too much left/right, so don't do anything
return;
}
if((gestureStartPoint.x - gestureEndPoint.x) < 20 && (gestureStartPoint.x - gestureEndPoint.x) > -20)
{
if((gestureStartPoint.y - gestureEndPoint.y) > (gestureStartPoint.x - gestureEndPoint.x))
{
if(dy > 0)
{
// User has made an upwards slide motion
}
else
{
// User has made a downwards slide motion
else
self.number = 0;
}
}
}
}
}
不,那是当你把你的手指* *关闭屏幕。我想要检测手指在屏幕上但在滑动移动后不移动。 –