在点击特定点时更改Uislider值

Question

我想点击而不是通过拖动滑块来点击UISlider上的特定点时触发操作。

如何在点上设置滑块值点击UISlider？

一段代码将不胜感激。

Answer 1

如果V1是与该地方uislider后面普通的背景一个UIView \

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
    UITouch *touch = [touches anyObject]; 
    if ([touch view] == v1) 
    { 
    CGPoint location = [touch locationInView:v1]; 
    NSInteger i = location.x; 
    } 

然后通过与V1的帧即如果V1帧x值= 50和我相乘得到XPOINT的百分比

尝试的UIView的touchesBegan功能= 5means 10％然后乘以滑块值的百分比值来改变滑块值

Answer 2

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

滑块设置

… 
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]; 
}