最近碰到个需求，需要仿微信语音通话缩小化后，保持界面最上层有一个悬浮的小View可以一点击就把刚刚缩放掉的界面再放回来，其实本质就是创造了一个新的Window，在这个window上创建了一个rootController并展示他，缩小化时是把controller dismiss掉了，再次点击那个小View之后把这个controller再展示出来便可以了。同理微信小程序其实也是在一个新的Window中做了一套新的逻辑。随着现在手机性能的提升，多Window同时存在并不会造成严重卡顿，而衍生出来的一种新的开发方式。
上代码，这个是根据网上找到的类似效果进行了部分修改的，作者叫冯琦帆
SuspendTool
import Foundation
import UIKit
enum SuspendType {
case none
case single
case multi
}
class SuspendTool: NSObject {
static let sharedInstance = SuspendTool()
private var suspendWindows: [SuspendWindow] = []
// var semicircle: Semicircle?
var origin: CGPoint = CGPoint.init(x: 10, y: 300)
static func showSuspendWindow(rootViewController: UIViewController, coverImageName: String) {
let tool = SuspendTool.sharedInstance
let window = SuspendWindow.init(rootViewController: rootViewController, coverImageName: coverImageName, frame: CGRect.init(origin: tool.origin, size: CGSize.init(width: radious, height: radious)))
window.show()
tool.suspendWindows.append(window)
}
static func replaceSuspendWindow(rootViewController: UIViewController, coverImageName: String) {
let tool = SuspendTool.sharedInstance
tool.suspendWindows.removeAll()
let window = SuspendWindow.init(rootViewController: rootViewController, coverImageName: coverImageName, frame: CGRect.init(origin: tool.origin, size: CGSize.init(width: radious, height: radious)))
window.show()
tool.suspendWindows.append(window)
}
static func remove(suspendWindow: SuspendWindow) {
UIView.animate(withDuration: 0.25, animations: {
suspendWindow.alpha = 0
}) { (complete) in
if let index = SuspendTool.sharedInstance.suspendWindows.index(of: suspendWindow) {
SuspendTool.sharedInstance.suspendWindows.remove(at: index)
}
}
}
static func setLatestOrigin(origin: CGPoint) {
SuspendTool.sharedInstance.origin = origin
}
}
SuspendWindow
import UIKit
let radious: CGFloat = 82
class SuspendWindow: UIWindow {
fileprivate let coverImageName: String
fileprivate let space: CGFloat = 15
var containsRootViewController: UIViewController?
init(rootViewController: UIViewController ,coverImageName: String, frame: CGRect) {
self.coverImageName = coverImageName
super.init(frame: frame)
// self.rootViewController = rootViewController
self.containsRootViewController = rootViewController
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func show() {
self.backgroundColor = UIColor.clear
self.windowLevel = UIWindow.Level.alert - 1//UIWindowLevelAlert - 1
self.screen = UIScreen.main
self.isHidden = false
let bgView = UIView()
bgView.isUserInteractionEnabled = true
bgView.frame = self.bounds
bgView.backgroundColor = UIColor.white
bgView.layer.cornerRadius = radious / 2.0
bgView.layer.borderColor = UIColor.lightGray.cgColor
bgView.layer.borderWidth = 5
bgView.layer.masksToBounds = true
self.addSubview(bgView)
bgView.addSubview(iconImageView)
bgView.addSubview(timeLabel)
let panGesture = UIPanGestureRecognizer.init(target: self, action: #selector(didPan(_:)))
self.addGestureRecognizer(panGesture)
let tapGesture = UITapGestureRecognizer.init(target: self, action: #selector(didTap(_:)))
self.addGestureRecognizer(tapGesture)
}
@objc fileprivate func didTap(_ tapGesture: UITapGestureRecognizer) {
SuspendTool.sharedInstance.origin = self.frame.origin
self.containsRootViewController?.spread(from: self.self.frame.origin)
SuspendTool.remove(suspendWindow: self)
}
@objc fileprivate func didPan(_ panGesture: UIPanGestureRecognizer) {
let point = panGesture.translation(in: panGesture.view)
var originX = self.frame.origin.x + point.x
if originX < space {
originX = space
} else if originX > UIScreen.main.bounds.width - radious - space {
originX = UIScreen.main.bounds.width - radious - space
}
var originY = self.frame.origin.y + point.y
if originY < space {
originY = space
} else if originY > UIScreen.main.bounds.height - radious - space {
originY = UIScreen.main.bounds.height - radious - space
}
self.frame = CGRect.init(x: originX, y: originY, width: self.bounds.width, height: self.bounds.height)
if panGesture.state == UIGestureRecognizer.State.cancelled || panGesture.state == UIGestureRecognizer.State.ended || panGesture.state == UIGestureRecognizer.State.failed {
self.adjustFrameAfterPan()
}
panGesture.setTranslation(CGPoint.zero, in: self)
}
fileprivate func adjustFrameAfterPan() {
var originX: CGFloat = space
if self.center.x < UIScreen.main.bounds.width / 2 {
originX = space
} else if self.center.x >= UIScreen.main.bounds.width / 2 {
originX = UIScreen.main.bounds.width - radious - space
}
UIView.animate(withDuration: 0.25, animations: {
self.frame = CGRect.init(x: originX, y: self.frame.origin.y, width: self.frame.size.width, height: self.frame.size.height)
}) { (complete) in
SuspendTool.setLatestOrigin(origin: self.frame.origin)
}
}
lazy var timeLabel: UILabel = {
let timeLabel = UILabel()
timeLabel.frame = CGRect(x: 0, y: 55.5, width: 42, height: 13)
timeLabel.center.x = self.bounds.size.width / 2
timeLabel.textAlignment = .center
timeLabel.text = "0:00"
timeLabel.textColor = UIColor.text
timeLabel.font = UIFont.mediumFont(ofSize: 13)
return timeLabel
}()
lazy var iconImageView: UIImageView = {
let iconImageView = UIImageView.init(image: UIImage.init(named: coverImageName))
iconImageView.isUserInteractionEnabled = true
iconImageView.frame = CGRect(x: 0, y: 12, width: 38, height: 38)
iconImageView.center.x = self.bounds.size.width / 2
return iconImageView
}()
}
UIViewController+FF
import Foundation
import UIKit
extension UIViewController {
func suspend(coverImageName: String, type: SuspendType) {
if type == .none {
self.navigationController?.popViewController(animated: true)
return
}
self.view.layer.masksToBounds = true
UIView.animate(withDuration: 0.25, animations: {
self.view.layer.cornerRadius = radious / 2.0
self.view.frame = CGRect.init(origin: SuspendTool.sharedInstance.origin, size: CGSize.init(width: radious, height: radious))
self.view.layoutIfNeeded()
}) { (complete) in
self.navigationController?.popViewController(animated: false)
if type == .single {
SuspendTool.replaceSuspendWindow(rootViewController: self, coverImageName: coverImageName)
} else {
SuspendTool.showSuspendWindow(rootViewController: self, coverImageName: coverImageName)
}
}
}
func spread(from point: CGPoint) {
if let isContain = self.navigationController?.viewControllers.contains(self), isContain {
return
}
self.view.frame = CGRect.init(origin: point, size: CGSize.init(width: radious, height: radious))
//UIViewController.currentViewController()
UIViewController.currentViewController().navigationController?.pushViewController(self, animated: false)
UIView.animate(withDuration: 0.25, animations: {
self.view.layer.cornerRadius = 0
self.view.frame = UIScreen.main.bounds
self.view.layoutIfNeeded()
})
}
static func currentViewController() -> UIViewController {
var rootViewController: UIViewController? = nil
for window in UIApplication.shared.windows {
if (window.rootViewController != nil) {
rootViewController = window.rootViewController
break
}
}
var viewController = rootViewController
while (true) {
if viewController?.presentedViewController != nil {
viewController = viewController!.presentedViewController
} else if viewController!.isKind(of: UINavigationController.self) {
viewController = (viewController as! UINavigationController).visibleViewController
} else if viewController!.isKind(of: UITabBarController.self) {
viewController = (viewController as! UITabBarController).selectedViewController
} else {
break
}
}
return viewController!
}
}
