在iOS 7上延迟UIButton突出显示的状态

我在Xcode - Single View应用程序中创建了新项目。 应用程序只有两个按钮。

UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
[button1 setBackgroundColor:[UIColor greenColor]];
[button1 setFrame:CGRectMake(0, self.view.frame.size.height-40-100, self.view.frame.size.width, 40)];
[button1 setTitle:NSLocalizedString(@"button 1", nil) forState:UIControlStateNormal];
[button1 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button1 setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
[self.view addSubview:button1];

UIButton *button2 = [UIButton buttonWithType:UIButtonTypeCustom];
[button2 setBackgroundColor:[UIColor greenColor]];
[button2 setFrame:CGRectMake(0, self.view.frame.size.height-40, self.view.frame.size.width, 40)];
[button2 setTitle:NSLocalizedString(@"button 2", nil) forState:UIControlStateNormal];
[button2 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button2 setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
[self.view addSubview:button2];

当我在iOS 7上运行此应用程序时，第二个按钮在按下此按钮时延迟了突出显示的状态。 在iOS 6的iPhone上，第二个按钮非常完美。

为什么iOS 7上的按钮有突出显示的延迟？

---

我的问题是我有一个UIButton作为分页UIScrollView的子视图，所以我希望用户能够正确地滑过按钮所在的区域，而不用按按钮。 在iOS6中，如果你通过一个四舍五入的矩形按钮来做到这一点，它可以正常工作，但在iOS7中它也可以工作，但按钮不会触发它的亮点。 所以要解决这个问题，我使用longPressGestureRecognizer实现了自己的UIButton ：

- (void) longPress:(UILongPressGestureRecognizer *)longPressGestureRecognizer
{
    if (longPressGestureRecognizer.state == UIGestureRecognizerStateBegan || longPressGestureRecognizer.state == UIGestureRecognizerStateChanged)
    {

        CGPoint touchedPoint = [longPressGestureRecognizer locationInView: self];

        if (CGRectContainsPoint(self.bounds, touchedPoint))
        {
            [self addHighlights];
        }
        else
        {
            [self removeHighlights];
        }
    }
    else if (longPressGestureRecognizer.state == UIGestureRecognizerStateEnded)
    {
        if (self.highlightView.superview)
        {
            [self removeHighlights];
        }

        CGPoint touchedPoint = [longPressGestureRecognizer locationInView: self];

        if (CGRectContainsPoint(self.bounds, touchedPoint))
        {
            if ([self.delegate respondsToSelector:@selector(buttonViewDidTouchUpInside:)])
            {
                [self.delegate buttonViewDidTouchUpInside:self];
            }
        }
    }
}

然后，当你初始化longPressGestureRecognizer ，你会这样做：

self.longPressGestureRecognizer.minimumPressDuration = .05;

这将允许您在不触发按钮的情况下轻扫按钮，还可以让您按下该按钮并使其高亮触发。 希望这可以帮助。

---

尝试在滚动视图子类中重载此方法：

- (BOOL)touchesShouldCancelInContentView:(UIView *)view
{
    // fix conflicts with scrolling and button highlighting delay:
    if ([view isKindOfClass:[UIButton class]])
        return YES;
    else
        return [super touchesShouldCancelInContentView:view];
}

---

我不确定OP是否仅仅需要视觉反馈，但如果是这样，将代码中的showsTouchWhenHighlighted属性设置为YES / true或检查IB中的Shows Touch On Highlight选项将完成此操作。

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