话不多说
效果图
一行代码完成调用
// UNoticeBar(config: UNoticeBarConfig(title: "绿壳蛋鸡佛问发")).show(duration: 3)
UNoticeBar(config: UNoticeBarConfig(title: "佛说：要化了", image: UIImage.init(named: "mine_accout"), textColor: .white, backgroundColor: .black, barStyle: .onNavigationBar, animationType: UNoticeBarAnimationType.bottom)).show(duration: 3)
代码片：
// UNoticeBar.swift
import UIKit
public enum UNoticeBarStyle {
case onStatusBar
case onNavigationBar
}
public enum UNoticeBarAnimationType {
case top
case bottom
case left
case right
}
extension UNoticeBarAnimationType {
fileprivate func noticeBarViewTransform(with frame:CGRect, _ style:UNoticeBarStyle) -> CGAffineTransform {
var transform = CGAffineTransform.identity
switch (style, self) {
case (_, .top):
transform = CGAffineTransform(translationX: 0, y: -frame.height)
case (_, .bottom):
transform = CGAffineTransform(translationX: 0, y: -frame.height)
case (_, .left):
transform = CGAffineTransform(translationX: -frame.width, y: 0)
case (_, .right):
transform = CGAffineTransform(translationX: frame.width, y: 0)
}
return transform
}
}
extension UNoticeBarStyle {
fileprivate func noticeBarProperties() -> UNoticeBarProperties {
let screenWidth = UIScreen.main.bounds.width
var properties: UNoticeBarProperties
switch self {
case .onNavigationBar:
properties = UNoticeBarProperties(shadowOffsetY: 3, fontSizeScaleFactor: 0.55, textFont: UIFont.systemFont(ofSize: 18), viewFrame: CGRect(origin: CGPoint.zero, size: CGSize(width: screenWidth, height: 44.0 + UIApplication.shared.statusBarFrame.height)))
case .onStatusBar:
properties = UNoticeBarProperties(shadowOffsetY: 2, fontSizeScaleFactor: 0.75, textFont: UIFont.systemFont(ofSize: 13), viewFrame: CGRect(origin: CGPoint.zero, size: CGSize(width: screenWidth, height: UIApplication.shared.statusBarFrame.height)))
}
return properties
}
fileprivate func noticeBarOriginY(superViewHeight: CGFloat, _ height: CGFloat) -> CGFloat {
var originY: CGFloat = 0
switch self {
case .onNavigationBar:
originY = UIApplication.shared.statusBarFrame.height + (superViewHeight - UIApplication.shared.statusBarFrame.height - height) * 0.5
case .onStatusBar:
originY = (superViewHeight - height) * 0.5
}
return originY
}
fileprivate var beginWindowLevel: UIWindowLevel {
switch self {
case .onStatusBar:
return UIWindowLevelStatusBar + 1
default:
return UIWindowLevelNormal
}
}
fileprivate var endWindowLevel: UIWindowLevel {
return UIWindowLevelNormal
}
}
fileprivate struct UNoticeBarProperties {
init() {
}
var shadowOffsetY: CGFloat = 0
var fontSizeScaleFactor: CGFloat = 0
var textFont = UIFont()
var viewFrame = CGRect.zero
init(shadowOffsetY: CGFloat, fontSizeScaleFactor: CGFloat, textFont: UIFont, viewFrame: CGRect) {
self.shadowOffsetY = shadowOffsetY
self.fontSizeScaleFactor = fontSizeScaleFactor
self.textFont = textFont
self.viewFrame = viewFrame
}
}
public struct UNoticeBarConfig {
public init() { }
public var title: String?
public var image: UIImage? = nil
public var margin: CGFloat = 10.0
public var textColor: UIColor = UIColor.black
public var backgroundColor = UIColor.white
public var animationType = UNoticeBarAnimationType.top
public var barStyle = UNoticeBarStyle.onNavigationBar
public init(title: String? = nil,
image: UIImage? = nil,
textColor: UIColor = UIColor.white,
backgroundColor: UIColor = UIColor.orange,
barStyle: UNoticeBarStyle = .onNavigationBar,
animationType: UNoticeBarAnimationType = .top) {
self.title = title
self.image = image
self.textColor = textColor
self.backgroundColor = backgroundColor
self.barStyle = barStyle
self.animationType = animationType
}
}
open class UNoticeBar: UIView {
private var config = UNoticeBarConfig()
private var _titleLabel: UILabel?
private var _imageView: UIImageView?
open var titleLabel: UILabel? {
return _titleLabel
}
open var imageView: UIImageView? {
return _imageView
}
public func show(duration: TimeInterval,completed: ((_ finished:Bool) -> Void)? = nil) {
self.show(duration: duration, willShow: {
[weak self] in
guard let strongSelf = self else { return }
let currentWindowLevel = strongSelf.config.barStyle.beginWindowLevel
UIApplication.shared.keyWindow?.windowLevel = currentWindowLevel
}, completed: {
[weak self] (finished) in
guard let strongSelf = self else {return}
completed?(finished)
if finished {
let currentWindowLevel = strongSelf.config.barStyle.endWindowLevel
UIApplication.shared.keyWindow?.windowLevel = currentWindowLevel
}
})
}
public init(config: UNoticeBarConfig) {
super.init(frame: config.barStyle.noticeBarProperties().viewFrame)
self.backgroundColor = config.backgroundColor
self.config = config
self.layer.shadowOffset = CGSize(width: 0, height: config.barStyle.noticeBarProperties().shadowOffsetY)
self.layer.shadowColor = UIColor.lightGray.cgColor
self.layer.shadowRadius = 5
self.layer.shadowOpacity = 0.44
configSubviews()
}
private override init(frame: CGRect) {
super.init(frame: frame)
}
public required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func configSubviews() {
_titleLabel = UILabel()
_titleLabel?.text = config.title
_titleLabel?.textColor = config.textColor
_titleLabel?.minimumScaleFactor = config.barStyle.noticeBarProperties().fontSizeScaleFactor
_titleLabel?.adjustsFontSizeToFitWidth = true
_titleLabel?.font = config.barStyle.noticeBarProperties().textFont
addSubview(_titleLabel!)
var titleLabelOriginY: CGFloat = 0
var titleLabelOriginX: CGFloat = 0
var titleLabelSizeWidth: CGFloat = 0
var titleLabelSizeHeight: CGFloat = 0
if let image = config.image, config.barStyle != .onStatusBar {
_imageView = UIImageView(image: image)
_imageView?.contentMode = .scaleAspectFill
addSubview(_imageView!)
let imageViewWidth:CGFloat = 25
let imageViewOriginX = config.margin + 10
let imageViewOriginY = config.barStyle.noticeBarOriginY(superViewHeight: frame.height, imageViewWidth)
_imageView?.frame = CGRect(origin: CGPoint(x: imageViewOriginX, y: imageViewOriginY), size: CGSize(width: imageViewWidth, height: imageViewWidth))
titleLabelOriginX = _imageView!.frame.maxX + config.margin
titleLabelOriginY = _imageView!.frame.origin.y
titleLabelSizeHeight = _imageView!.frame.size.height
titleLabelSizeWidth = UIScreen.main.bounds.width - titleLabelOriginX - config.margin
_titleLabel?.textAlignment = .left
} else {
_titleLabel?.textAlignment = .center
titleLabelSizeHeight = 25
titleLabelSizeWidth = UIScreen.main.bounds.width - 2 * config.margin
titleLabelOriginX = config.margin
titleLabelOriginY = config.barStyle.noticeBarOriginY(superViewHeight:frame.height, titleLabelSizeHeight)
}
_titleLabel?.frame = CGRect(x: titleLabelOriginX, y: titleLabelOriginY, width: titleLabelSizeWidth, height: titleLabelSizeHeight)
}
private func show(duration: TimeInterval,willShow:() -> Void, completed: ((_ finished: Bool) -> Void)?) {
if let subViews = UIApplication.shared.keyWindow?.subviews {
for view in subViews {
if view.isKind(of: UNoticeBar.self) {
view.removeFromSuperview()
}
}
}
willShow()
UIApplication.shared.keyWindow?.addSubview(self)
self.transform = config.animationType.noticeBarViewTransform(with: frame, self.config.barStyle)
UIView.animate(withDuration: 0.4, delay: 0, options: .curveEaseInOut, animations: {
self.transform = CGAffineTransform.identity
}) { (_) in
DispatchQueue.main.asyncAfter(deadline: .now() + duration, execute: {
UIView.animate(withDuration: 0.4, animations: {
self.transform = self.config.animationType.noticeBarViewTransform(with: self.frame, self.config.barStyle)
}, completion: { (_) in
self.removeFromSuperview()
})
})
}
}
}
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