MarqueeLabel Please be fully aware that these use Private APIs.

MarqueeLabel-Minimal.swift

let label = UILabel()
label.text = "Swift is a modern, intuitive programming language crafted for all Apple platforms."
label.setValue(true, forKey: "marqueeEnabled")
label.setValue(true, forKey: "marqueeRunning")
label.setValue(0, forKey: "marqueeRepeatCount")

MarqueeLabel.swift

//
//  MarqueeLabel.swift
//  PrivateAPISample
//  
//  Created by Chronos2500 on 2025/05/13.
//

import SwiftUI

fileprivate let text = """
Swift is a modern, intuitive programming language crafted for all Apple platforms. 
"""

struct MarqueeLabelView: View {
    var body: some View {
        MarqueeLabel(
            text,
            font: .preferredFont(forTextStyle: .title1)
        )
    }
}

struct MarqueeLabel: UIViewRepresentable {
    var text: String
    var repeatCount: Int
    var font: UIFont
    var textColor: UIColor

    init(
        _ text: String,
        repeatCount: Int = 0,
        font: UIFont = .preferredFont(forTextStyle: .body),
        textColor: UIColor = .label
    ) {
        self.text = text
        self.repeatCount = repeatCount
        self.font = font
        self.textColor = textColor
    }

    func makeUIView(context: Context) -> UILabel {
        let label = UILabel()
        label.text = text
        label.textAlignment = .natural
        label.font = font
        label.textColor = textColor
        label.backgroundColor = .clear
        label.numberOfLines = 1
        label.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        label.setContentHuggingPriority(.defaultLow, for: .horizontal)
        label.setContentHuggingPriority(.required, for: .vertical)
        label.setContentCompressionResistancePriority(.required, for: .vertical)
        label.adjustsFontForContentSizeCategory = true
        label.setValue(true, forKey: "marqueeEnabled")
        label.setValue(true, forKey: "marqueeRunning")
        label.setValue(repeatCount, forKey: "marqueeRepeatCount")
        label.setValue(40, forKey: "marqueeLoopPadding")
        label.setValue(true, forKey: "marqueeUpdatable")
        return label
    }
    func updateUIView(_ uiView: UILabel, context: Context) {
    }
}

#Preview {
    MarqueeLabelView()
}

• Setting marqueeRepeatCount to 0 will cause the marquee effect to repeat indefinitely. If a positive integer is specified, the marquee will stop after completing the specified number of repetitions.
• By default, after completing one full scroll, the marquee pauses for a certain duration before repeating.
• When the marquee effect is active, both ends of the content are automatically masked with a fading gradient effect.
• By default, the marquee effect is not triggered if the content width is shorter than the view’s width.

MarqueeLabel.mov

Any way to make them pause to wait for another label to finish? Kinda like in apple music

Any way to make them pause to wait for another label to finish? Kinda like in apple music

@llsc12
To temporarily stop the marquee effect, execute setValue(false, forKey: "marqueeRunning").
In SwiftUI, it’s recommended to use a @ Binding variable and update the state within the updateUIView function.

@llsc12 To temporarily stop the marquee effect, execute setValue(false, forKey: "marqueeRunning"). In SwiftUI, it’s recommended to use a @ Binding variable and update the state within the updateUIView function.

@Chronos2500 how would i know when to stop one marquee label to wait for the other? presumably i'd need to know when the last label has finished before i can then tell all labels to run again right? thanks.