swift - UIView弹窗协议
// // DCUIAlertSystemAnimationProtocol.swift // doctor // // Created by baitongtong on 2022/6/6. // Copyright © 2022 apple. All rights reserved. // import UIKit import SnapKit private var _coverKey = "DC_alertCoverKey" private var _constraintsClosureKey = "DC_constraintsClosureKey" protocol DCAlertSystemAnimationProtocol { /// 弹出 func present() /// 消失 func dismiss() /// 指定alertView约束 present 之前可设置 func constrains(_ closure: @escaping (ConstraintMaker) -> Void) } extension DCAlertSystemAnimationProtocol where Self: UIView { private var _alertCover: UIView { set { objc_setAssociatedObject(self, &_coverKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) } get { return ((objc_getAssociatedObject(self, &_coverKey) as? UIView) ?? UIView()) } } private var _constrainsClosure: ((ConstraintMaker) -> Void)? { set { objc_setAssociatedObject(self, &_constraintsClosureKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) } get { guard let closure = objc_getAssociatedObject(self, &_constraintsClosureKey) as? ((ConstraintMaker) -> Void) else { return nil } return closure } } func constrains(_ closure: @escaping (ConstraintMaker) -> Void) { _constrainsClosure = closure } func present() { let cover = UIView() cover.frame = UIScreen.main.bounds cover.backgroundColor = .init(white: 0, alpha: 0.25) cover.addSubview(self) if let constraintsClosure = _constrainsClosure { self.snp.makeConstraints(constraintsClosure) } else { self.snp.makeConstraints { make in make.center.equalToSuperview() make.left.equalTo(25) } } cover.alpha = 0 self.alpha = 0.5 UIApplication.shared.keyWindow?.addSubview(cover) cover.layoutIfNeeded() self.transform = CGAffineTransform(scaleX: 1.1, y: 1.1) UIView.animate(withDuration: 0.2, delay: 0, options: .curveEaseInOut) { cover.alpha = 1 self.alpha = 1 self.transform = CGAffineTransform.identity } _alertCover = cover } func dismiss() { UIView.animate(withDuration: 0.2, delay: 0, options: .curveEaseInOut) { self._alertCover.alpha = 0 } completion: { isCompleted in if isCompleted { self.removeFromSuperview() self._alertCover.removeFromSuperview() } } } }
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