Question

这是panGesture的实例。

   pangstr = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];

- (void)handlePan:(UIPanGestureRecognizer *)recognizer{

    CGPoint translation = [recognizer translationInView:baseView];
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y);
    [recognizer setTranslation:CGPointMake(0, 0) inView:baseView];


    if (recognizer.state == UIGestureRecognizerStateEnded) {


        CGPoint velocity = [recognizer velocityInView:baseView];
        CGFloat magnitude = sqrtf((velocity.x * velocity.x));
        CGFloat slideMult = magnitude / 1000;
        NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult);
        float slideFactor = 0.15 * slideMult;

        CGPoint finalPoint = CGPointMake(recognizer.view.center.x + (velocity.x * slideFactor),
                                         recognizer.view.center.y + (velocity.y * slideFactor));
}

现在我的问题是我如何使用（panGestureRecogniser *）识别器参数 - （void）touchesMoved：（NSSet *）触及withEvent：（UIEvent *）事件函数。我特别想要这个，因为我想在我的TouchesMoved函数中获取finalPoint的值，而CGPoint finalPoint使用* recogniser参数。

如果有人能给我一个解决方案，真的很棒感谢

Answer 1

为什么不使用识别器状态？

if (recognizer.state == UIGestureRecognizerStateChanged) 
{
    //Save whatever information you need here
}

对于共享变量，请为StateChanged使用不同的变量并在StateEnded中同步它们？

为什么在拖动视图时不会多次调用touchesMoved方法 - IOS

1 个答案: