How to get the center of the thumb image of UISlider

Question

I\'m creating a custom UISlider to test out some interface ideas. Mostly based around making the thumb image larger.

I found out how to do that, <

Answer 1

Above solution is useful when UISlider is horizontal. In a recent project,we need to use UISlider with angle. So I need to get both x and y position. Using below to calculate the x,y axis:

- (CGPoint)xyPositionFromSliderValue:(UISlider *)aSlider WithAngle:(double)aangle{
   //aangle means the dextrorotation angle compare to horizontal.
   float xOrigin = 0.0;
   float yOrigin = 0.0;
   float xValueToaXis=0.0;
   float yValueToaXis=0.0;
   float sliderRange = slider_width-aSlider.currentThumbImage.size.width;
   xOrigin = aSlider.frame.origin.x+slider_width*fabs(cos(aangle/180.0*M_PI));
   yOrigin = aSlider.frame.origin.y;

   xValueToaXis = xOrigin + ((((((aSlider.value-aSlider.minimumValue)/(aSlider.maximumValue-aSlider.minimumValue)) * sliderRange))+(aSlider.currentThumbImage.size.width / 2.0))*cos(aangle/180.0*M_PI)) ;
   yValueToaXis =  yOrigin + ((((((aSlider.value-aSlider.minimumValue)/(aSlider.maximumValue-aSlider.minimumValue)) * sliderRange))+(aSlider.currentThumbImage.size.width / 2.0))*sin(aangle/180.0*M_PI));

   CGPoint xyPoint=CGPointMake(xValueToaXis, yValueToaXis);
   return xyPoint;
}

Besides, can I Create a Ranger Slider based on UISlider? Thanks.