SAlertView (swift)

2018-05-07

• swift4.0
• snapkit

import UIKit

class SAlertView: UIView {

    static var alert : SAlertView?
    
    typealias Block = () -> Void
    var selectBlock : Block?
    
    var blackView : UIView!
    var alertLab : UILabel!
    var alertBgView : UIVisualEffectView!
    
    var alertTitleLab : UILabel!
    var alertCancelBtn : UIButton!
    var alertConfirmBtn : UIButton!
    
    var horizontalLine : UIView!
    var verticalLine : UIView!
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        createLayouts()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    //MARK: - 布局
    func createLayouts() {
        
        blackView = UIView()
        blackView.backgroundColor = kRGBACOLOR(r: 65, g: 65, b: 65, a: 0.5)
        addSubview(blackView)
        
        alertBgView = UIVisualEffectView.init(effect: UIBlurEffect.init(style: .extraLight))
        alertBgView.layer.cornerRadius = 10
        alertBgView.layer.masksToBounds = true
        addSubview(alertBgView)
        
        alertLab = UILabel()
        alertLab.font = UIFont.systemFont(ofSize: 16)
        alertLab.textAlignment = .center
        alertLab.numberOfLines = 10
        addSubview(alertLab)
        
        alertTitleLab = UILabel()
        alertTitleLab.font = UIFont.boldSystemFont(ofSize: 18)
        alertTitleLab.textAlignment = .center
        addSubview(alertTitleLab)
        
        alertCancelBtn = UIButton.init(type: .system)
        alertCancelBtn.setTitleColor(.blue, for: .normal)
        alertCancelBtn.setTitle("取消", for: .normal)
        alertCancelBtn.addTarget(self, action: #selector(cancelAction(sender:)), for: .touchUpInside)
        addSubview(alertCancelBtn)
        
        alertConfirmBtn = UIButton.init(type: .system)
        alertConfirmBtn.setTitleColor(.red, for: .normal)
        alertConfirmBtn.setTitle("確定", for: .normal)
        alertConfirmBtn.addTarget(self, action: #selector(comfirmAction(sender:)), for: .touchUpInside)
        addSubview(alertConfirmBtn)
        
        horizontalLine = UIView()
        horizontalLine.backgroundColor = .lightGray
        addSubview(horizontalLine)
        
        verticalLine = UIView()
        verticalLine.backgroundColor = .lightGray
        addSubview(verticalLine)
        
        blackView.snp.makeConstraints { (make) in
            make.edges.equalTo(self.snp.edges)
        }
        
        alertLab.snp.makeConstraints { (make) in
            make.center.equalTo(self.snp.center)
            make.left.equalTo(50)
            make.right.equalTo(-50)
            make.height.greaterThanOrEqualTo(50).priority(.high)
        }
        
        alertTitleLab.snp.makeConstraints { (make) in
            make.bottom.equalTo(alertLab.snp.top)
            make.left.equalTo(50)
            make.right.equalTo(-50)
            make.height.equalTo(30)
        }
        
        alertCancelBtn.snp.makeConstraints { (make) in
            make.top.equalTo(alertLab.snp.bottom).offset(5)
            make.left.equalTo(40)
            make.height.equalTo(40)
        }
        
        alertConfirmBtn.snp.makeConstraints { (make) in
            make.top.equalTo(alertLab.snp.bottom).offset(5)
            make.left.equalTo(alertCancelBtn.snp.right)
            make.right.equalTo(-40)
            make.width.equalTo(alertCancelBtn.snp.width)
            make.height.equalTo(40)
        }
        
        alertBgView.snp.makeConstraints { (make) in
            make.top.equalTo(alertTitleLab.snp.top).offset(-10)
            make.left.equalTo(alertLab.snp.left).offset(-10)
            make.right.equalTo(alertLab.snp.right).offset(10)
            make.bottom.equalTo(alertConfirmBtn.snp.bottom).offset(0)
        }
        
        horizontalLine.snp.makeConstraints { (make) in
            make.bottom.equalTo(alertCancelBtn.snp.top).offset(-0.5)
            make.left.equalTo(40)
            make.right.equalTo(-40)
            make.height.equalTo(0.5)
        }
        
        verticalLine.snp.makeConstraints { (make) in
            make.top.equalTo(alertCancelBtn.snp.top)
            make.left.equalTo(alertCancelBtn.snp.right).offset(-0.25)
            make.right.equalTo(alertConfirmBtn.snp.left).offset(0.25)
            make.height.equalTo(40)
        }
    }
    
    //MARK: - 展示
    static func show(title: String, alertText: String, action: @escaping Block) {
        
        if alert != nil {
            alert?.removeFromSuperview()
            alert = nil
        }
        
        alert = SAlertView()
        alert?.selectBlock = action
        alert?.alertTitleLab.text = title
        alert?.alertLab.text = alertText
        kAppDelegate?.window?.addSubview(alert!)
        alert?.snp.makeConstraints { (make) in
            make.edges.equalTo((kAppDelegate?.window?.snp.edges)!)
        }
    }
    
    //MARK: - 隐藏
    private func dismiss() {
        
        SAlertView.alert?.removeFromSuperview()
        SAlertView.alert = nil
    }
    
    //MARK: - 取消
    @objc func cancelAction(sender: UIButton) {
        
        dismiss()
    }
    
    //MARK: - 确定
    @objc func comfirmAction(sender: UIButton) {
        
        if let block = self.selectBlock {
            
            block()
        }
        
        dismiss()
    }

}

• example

SAlertView.show(title: "延迟通知", alertText: "邮件的延迟通知内容邮件的延迟通知内容"){
                printLog("確定")
            }

• display

SAlertView.jpeg