// 自定义TextView实现跑马灯效果
public class MarqueeTextView extends TextView {
    public MarqueeTextView(Context context) {
        super(context);
        init();
    }

    public MarqueeTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        setSingleLine(true);
        setEllipsize(TextUtils.TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-1);
        setHorizontallyScrolling(true);
    }

    @Override
    public boolean isFocused() {
        return true;
    }
}

<com.example.MarqueeTextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="这是一个会自动向右移动的标题"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:marqueeRepeatLimit="marquee_forever" />

// 自定义UILabel实现跑马灯效果
class MarqueeLabel: UILabel {
    override func draw(_ rect: CGRect) {
        let context = UIGraphicsGetCurrentContext()
        context?.saveGState()
        
        let textSize = (self.text! as NSString).size(withAttributes: [.font: self.font!])
        
        if textSize.width > self.bounds.width {
            let offset = CGFloat(5.0) // 移动速度
            let startX = self.bounds.width - (offset * CGFloat(CFAbsoluteTimeGetCurrent() - startTime))
            
            context?.translateBy(x: startX, y: 0)
        }
        
        super.draw(rect)
        context?.restoreGState()
    }
    
    private var startTime = CFAbsoluteTimeGetCurrent()
    
    override func layoutSubviews() {
        super.layoutSubviews()
        self.setNeedsDisplay()
    }
}

<div class="marquee-container">
    <div class="marquee-text">这是一个会自动向右移动的标题</div>
</div>

<style>
.marquee-container {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

.marquee-text {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 15s linear infinite;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}
</style>