试试这个代码：在 Xcode 8 中测试的代码。
/使用以下代码更新您的 plist
View controller-based status bar appearance = NO
//在你的VC中：
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
title = "Some Title"
navigationController?.navigationBar.tintColor = UIColor.white
navigationController?.navigationBar.barTintColor = UIColor.red
navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName:UIColor.white]
UIApplication.shared.statusBarStyle = .lightContent // To change your status bar to display light content (In white colour)
}
func sleepCycleNotify() {
// To set BannerView
let barView = UIView(frame: CGRect(x:0, y:0, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height)))
barView.backgroundColor=UIColor.red // set to any colour you want..
navigationController?.navigationBar.addSubview(barView)
let notifyLabel = UILabel()
notifyLabel.frame = CGRect(x:0, y:0, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height))
notifyLabel.backgroundColor=UIColor.clear
notifyLabel.text = "Sleep Cycle"
notifyLabel.textAlignment = .center
notifyLabel.textColor = UIColor.white
notifyLabel.alpha = 0.8
barView.addSubview(notifyLabel)
// Animation 1:
// To achive animation
barView.center.y -= (navigationController?.navigationBar.bounds.height)!
UIView.animate(withDuration: 0.7, delay: 0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.6, options: UIViewAnimationOptions.curveEaseIn, animations:{
barView.center.y += (self.navigationController?.navigationBar.frame.height)!
}, completion:{ finished in
UIView.animate(withDuration: 1, delay: 1.5, usingSpringWithDamping: 0.6, initialSpringVelocity: 0.9, options: UIViewAnimationOptions.curveEaseOut, animations:{
barView.center.y -= ((self.navigationController?.navigationBar.frame.height)! + UIApplication.shared.statusBarFrame.height)
}, completion: nil)
})
}
以上代码的输出：
//动画2：
func sleepCycleNotify() {
//
let barView = UIView(frame: CGRect(x:0, y:0, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height)))
barView.backgroundColor=UIColor.red // set any colour you want..
navigationController?.navigationBar.addSubview(barView)
let notifyLabel = UILabel()
notifyLabel.frame = CGRect(x:0, y:0, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height))
notifyLabel.backgroundColor=UIColor.clear
notifyLabel.text = "Sleep Cycle"
notifyLabel.textAlignment = .center
notifyLabel.textColor = UIColor.white
notifyLabel.alpha = 0.8
barView.addSubview(notifyLabel)
// To achive animation
barView.center.y -= (navigationController?.navigationBar.bounds.height)!
UIView.animate(withDuration: 1, delay: 0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.6, options: UIViewAnimationOptions.curveEaseIn, animations:{
UIApplication.shared.isStatusBarHidden = true
UINavigationController().navigationBar.isHidden = true
barView.center.y += (self.navigationController?.navigationBar.frame.height)!
}, completion:{ finished in
UIView.animate(withDuration: 1.5, delay: 0, usingSpringWithDamping: 0.6, initialSpringVelocity: 0.9, options: UIViewAnimationOptions.curveEaseOut, animations:{
// notifyLabel.alpha = 0...1
UIApplication.shared.isStatusBarHidden = false
UINavigationController().navigationBar.isHidden = false
barView.center.y -= ((self.navigationController?.navigationBar.frame.height)! + UIApplication.shared.statusBarFrame.height)
}, completion: nil)
})
}
动画 2 的输出：
改进的答案：
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
title = "Some Title"
navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName:UIColor.white]
navigationController?.navigationBar.barTintColor = UIColor.purple
UIApplication.shared.statusBarStyle = .lightContent
}
func sleepCycleNotify() {
// To set BannerView
let barView = UIView(frame: CGRect(x:0, y:-UIApplication.shared.statusBarFrame.height, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height) + UIApplication.shared.statusBarFrame.height ))
barView.backgroundColor=UIColor.red // set to any colour you want..
navigationController?.navigationBar.addSubview(barView)
let notifyLabel = UILabel()
notifyLabel.frame = CGRect(x:0, y:UIApplication.shared.statusBarFrame.height, width:view.frame.width, height:(UINavigationController().navigationBar.frame.height))
notifyLabel.backgroundColor=UIColor.clear
notifyLabel.numberOfLines = 0
notifyLabel.text = "Sleep Cycle"
notifyLabel.textAlignment = .center
notifyLabel.textColor = UIColor.white
notifyLabel.alpha = 0.8
barView.addSubview(notifyLabel)
// Animation 1:
// To achive animation
barView.center.y -= (navigationController?.navigationBar.bounds.height)!
UIView.animate(withDuration: 0.7, delay: 0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.6, options: UIViewAnimationOptions.curveEaseIn, animations:{
barView.center.y += (self.navigationController?.navigationBar.frame.height)!
}, completion:{ finished in
UIView.animate(withDuration: 1, delay: 1.5, usingSpringWithDamping: 0.6, initialSpringVelocity: 0.9, options: UIViewAnimationOptions.curveEaseOut, animations:{
barView.center.y -= ((self.navigationController?.navigationBar.frame.height)! + UIApplication.shared.statusBarFrame.height)
}, completion: nil)
})
}
动画 3 的输出：