Swift: Background color change in selected segment of UISegmentControl

Question

In my Swift app, I dont know how to change BGColor for selected segment alone, in UISegmentControl. I have tried a lot, only tint color is changing. I got success in Objective - C. I dont know how to convert that to SWIFT. Kindly guide me. My codings below:

Objective C

- (IBAction)mySeg:(UISegmentedControl *)sender {

    for (int i=0; i<[sender.subviews count]; i++)
    {
        if ([[sender.subviews objectAtIndex:i]isSelected] )
        {
            UIColor *tintcolor=[UIColor colorWithRed:255.0/255.0 green:0/255.0 blue:0/255.0 alpha:1.0];
            [[sender.subviews objectAtIndex:i] setTintColor:tintcolor];  //HERE SELECTED SEGMENT COLOR ALONE CHANGING
        }
        else
        {
            [[sender.subviews objectAtIndex:i] setTintColor:nil];
        }
    }
}

Swift

@IBAction func mySegAcn(sender: UISegmentedControl) {
for(var i : Int = 0; i < sender.subviews.count; i++)
{
    if((sender.subviews[i].isSelected) != nil) 
    {
        //var tint_Color =  UIColor(red: 1.0, green: 0, blue: 0, alpha: 1.0)

        (sender.subviews[i] as! UIView).tintColor = UIColor .redColor()  //HERE WHOLE TINT COLOR IS CHANGING
    }

    else
    {

        (sender.subviews[i] as! UIView).tintColor = nil
    }
}
}

Output

Answer 1

iOS 13 and Swift 5

Try using this extension:

extension UISegmentedControl {
    func setSelectedSegmentForegroundColor(_ foregroundColor: UIColor, andTintColor tintColor: UIColor) {
        if #available(iOS 13.0, *) {
            self.setTitleTextAttributes([.foregroundColor: foregroundColor], for: .selected)
            self.selectedSegmentTintColor = tintColor;
        } else {
            self.tintColor = tintColor;
        }
    }
}

Call:

segmentedControlName.setSelectedSegmentForegroundColor(.white, andTintColor: .black);

Answer 2

Swift 4

let sortedViews = segmentedControl.subviews.sorted( by: { $0.frame.origin.x < $1.frame.origin.x } )

for (index, view) in sortedViews.enumerated() {
    if index == segmentedControl.selectedSegmentIndex {
        view.tintColor = UIColor.red
    } else {
        view.tintColor = UIColor.green
    }
}

Answer 3

I tried using isSelected, it gives me an error saying the method does not exist. Here is another way to do it without the isSelected method

Use the value changed event for the UISegmentControl to sort the segments in order by their origin x value, then loop and compare the selectedSegmentIndex property. Here is an example with assuming a segmented control of 4 segments:

@IBAction func indexChanged(sender: UISegmentedControl) {

    let sortedViews = sender.subviews.sort( { $0.frame.origin.x < $1.frame.origin.x } )

    for (index, view) in sortedViews.enumerate() {
        if index == sender.selectedSegmentIndex {
            view.tintColor = UIColor.blueColor()
        } else {
            view.tintColor = UIColor.lightGrayColor()
        }
    }

}

Then in viewDidLoad set the tintColor for the initially selected segment, in this case it is the first:

let sortedViews = segmentedControlOutletVariable.subviews.sort( { $0.frame.origin.x < $1.frame.origin.x } )
sortedViews[0].tintColor = UIColor.blueColor()