I want to make UISlider
with minimumTrackTintColor
and minimumTrackTintColor
with track borderColor
I've already set a trackTintColor
for both minimum
and maximum
state but instead I want to add border for UISlider
track
UISlider
looks Like this:
class SliderWithHeart: UISlider
{
override func awakeFromNib()
{
super.awakeFromNib()
let imageTint = UIImage(named: "SliderHeart")
self.minimumTrackTintColor = colorWithHex(hex: COLORCODE.APP_BUTTON_COLOR)
self.maximumTrackTintColor = colorWithHex(hex: COLORCODE.APP_ORANGE_COLOR)
self.setThumbImage(imageTint, for: .normal)
}
override func layoutSubviews()
{
super.layoutSubviews()
super.layer.cornerRadius = self.frame.height/2
}
override func trackRect(forBounds bounds: CGRect) -> CGRect
{
var newBounds = super.trackRect(forBounds: bounds)
newBounds.size.height = 10
return newBounds
}
}
How do I set the border color of the slider track, not the entire slider?
You can get the super-view of UISlider
to do the modifications as per the requirements.
To increase the height:
class CustomSlider: UISlider {
override func trackRect(forBounds bounds: CGRect) -> CGRect {
let customBounds = CGRect(origin: bounds.origin, size: CGSize(width: bounds.size.width, height: 17.0))
super.trackRect(forBounds: customBounds)
return customBounds
}
}
To add the border (you can write this code in the viewDidLoad()
method):
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
if #available(iOS 14.0, *) {
self.slider.subviews.first?.subviews[1].layer.borderWidth = 2.8
self.slider.subviews.first?.subviews[1].layer.borderColor = UIColor.white.cgColor
self.slider.subviews.first?.subviews[1].makeRoundCorner(8.0)
}
else{
self.slider.subviews[1].layer.borderWidth = 2.8
self.slider.subviews[1].layer.borderColor = UIColor.white.cgColor
self.slider.subviews[1].makeRoundCorner(8.0)
}
}
I had to use the delay to get it initialized.
Result:
Note: I didn't provide the code for the thumb, shadow, and other properties of the slider.
I guess the best option is to add a border layer to Track CGRect.
Find below a UISlider subclassing approach in Swift 5:
final class BorderedUISlider: UISlider {
private var sliderBorder: CALayer = {
let layer = CALayer()
layer.borderWidth = 1
layer.borderColor = ***Here Your Color***.cgColor
return layer
}()
override func layoutSubviews() {
super.layoutSubviews()
let rect = trackRect(forBounds: bounds)
sliderBorder.removeFromSuperlayer()
sliderBorder.frame = rect
sliderBorder.cornerRadius = rect.height / 2
layer.addSublayer(sliderBorder)
}
}
If you debug UISlider on view hierarchy, you will see the boundaries of the slider.
According to this, you can set the backgroundColor
of the slider to add a border effect (default is nil
).
Example:
let valueSlider: UISlider = {
let slider = UISlider(frame: .zero)
slider.translatesAutoresizingMaskIntoConstraints = false
slider.isContinuous = true
slider.tintColor = .green
slider.thumbTintColor = .darkGray
slider.cornerRadius = 4
slider.clipsToBounds = false
slider.maximumTrackTintColor = .gray
// Setting the background will add the effect of a border for the slider
slider.backgroundColor = .gray
return slider
}()
The above figure is an example, using pure code implementation.
private let volumeSlider = UISlider().then {
let minimumTrackImage = UIView().then {
$0.backgroundColor = R.color.tint()
$0.pin.size(CGSize(width: 312, height: 6)) // <<< Key location, width of your slider, you can also customize the height here.
$0.cornerRadius = 3
}.screenshot
let maximumTrackImage = UIView().then {
$0.backgroundColor = .white
$0.pin.size(CGSize(width: 312, height: 6))
$0.borderColor = R.color.tint()
$0.borderWidth = 1
$0.cornerRadius = 3
}.screenshot
let thumbImage = UIView().then {
$0.backgroundColor = .white
$0.cornerRadius = 13
$0.pin.size($0.cornerRadius * 2)
$0.borderColor = R.color.tint()
$0.borderWidth = 1
}.screenshot
$0.setMinimumTrackImage(minimumTrackImage, for: .normal)
$0.setMaximumTrackImage(maximumTrackImage, for: .normal)
$0.setThumbImage(thumbImage, for: .normal)
$0.value = 0.3
}
The code is from my project, using a bunch of third-party libraries, but I think it should not prevent you from understanding it. They are all helpers and will not affect the core code.
Which:
- R
is from R.Swift .
- then
is from Then .
- pin
is from PinLayout .
- screenshot
is
extension UIView {
var screenshot: UIImage {
return UIGraphicsImageRenderer(size: bounds.size).image { _ in
drawHierarchy(in: bounds, afterScreenUpdates: true)
}
}
}
You can also use images. As long as the width is the same as the maximum width of the slider. Hope it helps you, although it is a little late. Any questions can be commented below.
Add the border width and border color to your UISlider
Yourslider.layer.borderWidth = 4.0
let red = UIColor(red: 255.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 1.0)
Yourslider.layer.borderColor = red.cgColor
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