iphone - 在特定点点击时更改 Uislider 值

Question

我想在点击 UISlider 上的特定点时触发一个 Action ，而不是拖动 slider 拇指。

如何在某个点上点击 UISlider 来设置 slider 值？

一段代码将不胜感激。

Answer 1

    UISlider *slider = [[[UISlider alloc] init] autorelease];
…

slider 设置

…
UITapGestureRecognizer *gr = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sliderTapped:)] autorelease];
[slider addGestureRecognizer:gr];
- (void)sliderTapped:(UIGestureRecognizer *)g {
     UISlider* s = (UISlider*)g.view;
    if (s.highlighted)
        return; // tap on thumb, let slider deal with it
    CGPoint pt = [g locationInView: s];
    CGFloat percentage = pt.x / s.bounds.size.width;
    CGFloat delta = percentage * (s.maximumValue - s.minimumValue);
    CGFloat value = s.minimumValue + delta;
    [s setValue:value animated:YES];
}