objective-c - UILabel 在 UISlider 拇指上

Question

我如何将 UILabel 放在 UISlider 的拇指上...这样当我移动拇指时...UILabel 也会移动...就像在拇指上一样...

有什么想法吗？？

Answer 1

试试这个

yourLabel = [[UILabel alloc]initWithFrame:....];

//Call this method on Slider value change event

-(void)sliderValueChanged{
    CGRect trackRect = [self.slider trackRectForBounds:self.slider.bounds];
    CGRect thumbRect = [self.slider thumbRectForBounds:self.slider.bounds
                               trackRect:trackRect
                                   value:self.slider.value];

    yourLabel.center = CGPointMake(thumbRect.origin.x + self.slider.frame.origin.x,  self.slider.frame.origin.y - 20);
}

通过使用此代码段，我可以获得最准确的值。