当UILabel文本溢出Swift 3中的视图时,可以通过以下两种方式来实现文本滚动或动画字幕样式:
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 30))
label.text = "This is a long text that needs to be scrolled"
label.textColor = UIColor.black
label.lineBreakMode = .byTruncatingMiddle
label.textAlignment = .left
label.sizeToFit()
// 添加Marquee效果
label.frame = CGRect(x: 0, y: 0, width: label.frame.width, height: 30)
label.center = CGPoint(x: view.bounds.width / 2, y: view.bounds.height / 2)
label.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin]
label.clipsToBounds = true
let marqueeContainerView = UIView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: 30))
marqueeContainerView.addSubview(label)
view.addSubview(marqueeContainerView)
// 添加动画
UIView.animate(withDuration: 10.0, delay: 1.0, options: [.repeat, .curveLinear], animations: {
label.frame.origin.x = -label.frame.width
}, completion: nil)
在上述代码中,我们首先创建了一个UILabel,并设置了其文本、颜色、lineBreakMode和textAlignment属性。然后,我们将UILabel添加到一个容器视图中,并设置容器视图的大小和位置。最后,我们使用UIView的animate(withDuration:delay:options:animations:completion:)方法来实现UILabel的滚动动画效果。
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 30))
label.text = "This is a long text that needs to be scrolled"
label.textColor = UIColor.black
label.lineBreakMode = .byTruncatingMiddle
label.textAlignment = .left
label.sizeToFit()
// 添加自定义动画
label.frame = CGRect(x: 0, y: 0, width: label.frame.width, height: 30)
label.center = CGPoint(x: view.bounds.width / 2, y: view.bounds.height / 2)
label.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin]
label.clipsToBounds = true
let animationDuration: TimeInterval = 10.0
let animationDelay: TimeInterval = 1.0
let animationOptions: UIView.AnimationOptions = [.curveLinear, .repeat]
UIView.animate(withDuration: animationDuration, delay: animationDelay, options: animationOptions, animations: {
label.frame.origin.x = -label.frame.width
}, completion: nil)
view.addSubview(label)
在上述代码中,我们同样创建了一个UILabel,并设置了其文本、颜色、lineBreakMode和textAlignment属性。然后,我们将UILabel添加到视图中,并使用UIView的animate(withDuration:delay:options:animations:completion:)方法来实现自定义的滚动动画效果。
以上两种方式都可以实现UILabel文本溢出时的滚动或动画字幕样式。具体选择哪种方式取决于实际需求和个人偏好。
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