UISlider with ProgressView combined

Question

Is there an apple-house-made way to get a UISlider with a ProgressView. This is used by many streaming applications e.g. native quicktimeplayer or youtube. (Just to be sure:

Answer 1

for Swift5

First, add tap gesture to slider:

let tap_gesture = UITapGestureRecognizer(target: self, action: #selector(self.sliderTapped(gestureRecognizer:)))
self.slider.addGestureRecognizer(tap_gesture)

Then, implement this function:

@objc func sliderTapped(gestureRecognizer: UIGestureRecognizer) {
    
    let locationOnSlider = gestureRecognizer.location(in: self.slider)
    let maxWidth = self.slider.frame.size.width
    let touchLocationRatio = locationOnSlider.x * CGFloat(self.slider.maximumValue) / CGFloat(maxWidth)
    self.slider.value = Float(touchLocationRatio)
    
    print("New value: ", round(self.slider.value))
   
}

Answer 2

Here is a solution in Objective C. https://github.com/abhimuralidharan/BufferSlider

The idea is to create a UIProgressview as a property in the UISlider subclass and add the required constraints programatically.

#import <UIKit/UIKit.h> //.h file

@interface BufferSlider : UISlider
@property(strong,nonatomic) UIProgressView *bufferProgress;
@end

#import "BufferSlider.h" //.m file

@implementation BufferSlider


- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self setup];
    }
    return self;
}
-(void)setup {
    self.bufferProgress = [[UIProgressView alloc] initWithFrame:self.bounds];
    self.minimumTrackTintColor = [UIColor redColor];
    self.maximumTrackTintColor = [UIColor clearColor];
    self.value = 0.2;
    self.bufferProgress.backgroundColor = [UIColor clearColor];
    self.bufferProgress.userInteractionEnabled = NO;
    self.bufferProgress.progress = 0.7;
    self.bufferProgress.progressTintColor = [[UIColor blueColor] colorWithAlphaComponent:0.5];
    self.bufferProgress.trackTintColor = [[UIColor lightGrayColor] colorWithAlphaComponent:2];
    [self addSubview:self.bufferProgress];
    [self setThumbImage:[UIImage imageNamed:@"redThumb"] forState:UIControlStateNormal];
    self.bufferProgress.translatesAutoresizingMaskIntoConstraints = NO;

    NSLayoutConstraint *left = [NSLayoutConstraint constraintWithItem:self.bufferProgress attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeft multiplier:1 constant:0];
    NSLayoutConstraint *centerY = [NSLayoutConstraint constraintWithItem:self.bufferProgress attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterY multiplier:1 constant:0.75];  // edit the constant value based on the thumb image
    NSLayoutConstraint *right = [NSLayoutConstraint constraintWithItem:self.bufferProgress attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTrailing multiplier:1 constant:0];

    [self addConstraints:@[left,right,centerY]];
    [self sendSubviewToBack:self.bufferProgress];
}
- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self) {
        [self setup];
    }
    return self;
}
@end

Answer 3

This is doable using the standard controls.

In Interface Builder place your UISlider immediately on top of your UIProgressView and make them the same size.

On a UISlider the background horizontal line is called the track, the trick is to make it invisible. We do this with a transparent PNG and the UISlider methods setMinimumTrackImage:forState: and setMaximumTrackImage:forState:.

In the viewDidLoad method of your view controller add:

[self.slider setMinimumTrackImage:[UIImage imageNamed:@"transparent.png"] forState:UIControlStateNormal];
[self.slider setMaximumTrackImage:[UIImage imageNamed:@"transparent.png"] forState:UIControlStateNormal];

where self.slider refers to your UISlider.

I've tested the code in Xcode, and this will give you a slider with an independent progress bar.