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自定义弹出消失视图
目录
import UIKit
class PopoverViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
}2.点击标题弹出控制器
@objc private func titleBtnClick(titleBtn : TitleButton) {
// 1.创建弹出的控制器
let popoverVc = PopoverViewController()
// 2.设置控制器的modal样式
popoverVc.modalPresentationStyle = .custom
// 3.设置转场的代理
popoverVc.transitioningDelegate = popoverAnimator
popoverAnimator.presentedFrame = CGRect(x: 100, y: 55, width: 180, height: 250)
// 4.弹出控制器
present(popoverVc, animated: true, completion: nil)
}3.改变弹出View的frame
封装一个XMGPresentationController，继承自UIPresentationController转场动画ViewController。
import UIKit
class XMGPresentationController: UIPresentationController {
// MARK:- 对外提供属性
var presentedFrame : CGRect = CGRect.zero
// MARK:- 懒加载属性
private lazy var coverView : UIView = UIView()
// MARK:- 系统回调函数
override func containerViewWillLayoutSubviews() {
super.containerViewWillLayoutSubviews()
// 1.设置弹出View的尺寸
presentedView?.frame = presentedFrame
// 2.添加蒙版
setupCoverView()
}
}
// MARK:- 设置UI界面相关
extension XMGPresentationController {
private func setupCoverView() {
// 1.添加蒙版
containerView?.insertSubview(coverView, at: 0)
// 2.设置蒙版的属性
coverView.backgroundColor = UIColor(white: 0.8, alpha: 0.2)
coverView.frame = containerView!.bounds
// 3.添加手势
let tapGes = UITapGestureRecognizer(target: self, action: #selector(coverViewClick))
coverView.addGestureRecognizer(tapGes)
}
}
// MARK:- 事件监听
extension XMGPresentationController {
@objc private func coverViewClick() {
presentedViewController.dismiss(animated: true, completion: nil)
}
}4.改变弹出View的frame
// MARK:- 自定义转场代理的方法
extension PopoverAnimator : UIViewControllerTransitioningDelegate {
// 目的:改变弹出View的尺寸
func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
let presentation = XMGPresentationController(presentedViewController: presented, presenting: presenting)
presentation.presentedFrame = presentedFrame
return presentation
}
// 目的:自定义弹出的动画
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = true
callBack!(isPresented)
return self
}
// 目的:自定义消失的动画
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = false
callBack!(isPresented)
return self
}
}
5. 弹出和消失动画代理的方法
extension PopoverAnimator : UIViewControllerAnimatedTransitioning {
/// 动画执行的时间
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 0.5
}
/// 获取`转场的上下文`:可以通过转场上下文获取弹出的View和消失的View
// UITransitionContextFromViewKey : 获取消失的View
// UITransitionContextToViewKey : 获取弹出的View
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
isPresented ? animationForPresentedView(transitionContext: transitionContext) : animationForDismissedView(transitionContext: transitionContext)
}
/// 自定义弹出动画
private func animationForPresentedView(transitionContext: UIViewControllerContextTransitioning) {
// 1.获取弹出的View
let presentedView = transitionContext.view(forKey: UITransitionContextViewKey.to)!
// 2.将弹出的View添加到containerView中
transitionContext.containerView.addSubview(presentedView)
// 3.执行动画
presentedView.transform = CGAffineTransform(scaleX: 1.0, y: 0.0)
presentedView.layer.anchorPoint = CGPoint(x: 0.5, y: 0)
UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
presentedView.transform = CGAffineTransform.identity
}) { (_) in
// 必须告诉转场上下文你已经完成动画
transitionContext.completeTransition(true)
}
}
/// 自定义消失动画
private func animationForDismissedView(transitionContext: UIViewControllerContextTransitioning) {
// 1.获取消失的View
let dismissView = transitionContext.view(forKey: UITransitionContextViewKey.from)
// 2.执行动画
UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
dismissView?.transform = CGAffineTransform(scaleX: 1.0, y: 0.00001)
}) { (_) in
dismissView?.removeFromSuperview()
// 必须告诉转场上下文你已经完成动画
transitionContext.completeTransition(true)
}
}
}6. 改变titleBtn的状态
1.自定义构造函数
// 注意:如果自定义了一个构造函数,但是没有对默认构造函数init()进行重写,那么自定义的构造函数会覆盖默认的init()构造函数
init(callBack : @escaping (Bool) -> ()) {
self.callBack = callBack
}2.调用闭包
// 目的:自定义弹出的动画
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = true
callBack!(isPresented)
return self
}
// 目的:自定义消失的动画
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresented = false
callBack!(isPresented)
return self
}3.调用初始化方法
private lazy var popoverAnimator : PopoverAnimator = PopoverAnimator {[weak self] (presented) -> () in
self?.titleBtn.isSelected = presented
}