Objective-C

Declare a slider property in the ViewController.h or in the interface of ViewController.m

@property (strong, nonatomic)UISlider *slider;//Define frame of slider and add to viewCGRect frame = CGRectMake(0.0, 100.0, 320.0, 10.0);
UISlider *slider = [[UISlider alloc] initWithFrame:frame];
[slider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
[self.slider setBackgroundColor:[UIColor clearColor]];
self.slider.minimumValue = 0.0;
self.slider.maximumValue = 50.0;
//sending a NO/False would update the value of slider only…