typealias PopPickerViewCallBackClosure = (_ resultStr:NSString?) -> ()class PopPickerView : UIView{    var dismissCallBack = {}    var rowAndComponentCallBack:PopPickerViewCallBackClosure?        fileprivate var blockContent : NSString?        var titleLabel : UILabel?    var divideLine : UIView?    var confirmButton : UIButton?    var cancelButton : UIButton?    var overlayView : UIControl?    var keyWindow : UIWindow?        override init(frame: CGRect) {        super.init(frame: frame)        self.backgroundColor = UIColor.white;                if (keyWindow == nil) {            self.keyWindow = UIApplication.shared.keyWindow        }        overlayView = UIControl.init(frame: UIScreen.main.bounds)        overlayView?.backgroundColor = UIColor.init(red: 0, green: 0, blue: 0, alpha: 0.5)        overlayView?.addTarget(self, action: #selector(hide), for: .touchUpInside)        overlayView?.alpha = 0        let toolView:UIView = UIView.init(frame: CGRect.init(x: 0, y: 0, width: Int(self.bounds.size.width), height: Int(40)))        toolView.backgroundColor = .white        addSubview(toolView)                cancelButton = UIButton.init(frame: CGRect.init(x: 18, y: 0, width: 40, height: toolView.bounds.size.height))        cancelButton?.setTitle("取消", for: .normal)        cancelButton?.setTitleColor(newColor(225, 185, 0), for: .normal)        cancelButton?.titleLabel?.font = UIFont.systemFont(ofSize: 14)        cancelButton?.contentHorizontalAlignment = .left        cancelButton?.addTarget(self, action: #selector(cancelAction), for: .touchUpInside)        toolView.addSubview(cancelButton!)                confirmButton = UIButton.init(frame: CGRect.init(x: (toolView.bounds.size.width - 30 - 18), y: 0, width: 30, height: toolView.bounds.size.height))        confirmButton?.setTitle("确定", for: .normal)        confirmButton?.setTitleColor(newColor(225, 185, 0), for: .normal)        confirmButton?.titleLabel?.font = UIFont.systemFont(ofSize: 14)        confirmButton?.contentHorizontalAlignment = .left        confirmButton?.addTarget(self, action: #selector(confirmAction), for: .touchUpInside)        toolView.addSubview(confirmButton!)                titleLabel = UILabel.init(frame: CGRect(x: CGFloat(Int(self.bounds.size.width)/2 - 75), y: 0, width: 150, height: toolView.bounds.size.height))        titleLabel?.text = "汽车排量"        titleLabel?.textColor = newColor(1, 1, 1)        titleLabel?.font = UIFont.systemFont(ofSize: 14)        titleLabel?.textAlignment = .center        toolView.addSubview(titleLabel!)                divideLine = UIView.init(frame: CGRect(x: 0, y: (confirmButton?.superview?.frame.maxY)!, width: toolView.bounds.size.width, height: 1))        divideLine?.backgroundColor = colorWithHexString("0xe5e5e5")        toolView.addSubview(divideLine!)    }       convenience init(frame: CGRect,dataSource:NSArray,title:String) {        self.init(frame: frame)        titleLabel?.text = title        if (dataSource.count != 0) {                        let picker = PickerViewBuilder.init(frame: CGRect.init(x: 38, y: ((confirmButton?.superview?.frame.maxY)! + 1), width: UIScreen.main.bounds.size.width - CGFloat(76), height: CGFloat(215)),dataSource:dataSource,contentCallBack:{ [weak self] (resultStr) in                self?.blockContent = resultStr            })            picker.rowAndComponentCallBack = {[weak self](resultStr) in                self?.blockContent = resultStr            }                        self.addSubview(picker)        }else{            assert(dataSource.count != 0, "dataSource is not allowed to be nil")        }    }        required init?(coder aDecoder: NSCoder) {        fatalError("init(coder:) has not been implemented")    }        func show(){        keyWindow?.addSubview(overlayView!)        keyWindow?.addSubview(self)        UIView.animate(withDuration: 0.25, animations: {            self.overlayView?.alpha = 1.0            var frame = self.frame            frame.origin.y = UIScreen.main.bounds.size.height - self.bounds.size.height            self.frame = frame        }) { (isFinished) in        }    }    @objc func hide() {        self.dismissCallBack()        UIView.animate(withDuration: 0.25, animations: {            self.overlayView?.alpha = 0            var frame = self.frame            frame.origin.y = UIScreen.main.bounds.size.height            self.frame = frame        }) { (isFinished) in            self.overlayView?.removeFromSuperview()            self.removeFromSuperview()        }    }    @objc func cancelAction() {        hide()    }        @objc func confirmAction() {        if blockContent == "" {            showAlert(withTitle: "提示", message: "未选择任何一项！")        }else{            self.rowAndComponentCallBack!(blockContent)        }        hide()    }        @objc private func showAlert(withTitle title: String?, message: String?) {        let alertVc = UIAlertController.init(title: title, message: message, preferredStyle: UIAlertController.Style.alert)        alertVc.addAction(UIAlertAction.init(title: "我知道了", style: UIAlertAction.Style.cancel, handler: nil))        UIApplication.shared.keyWindow?.rootViewController?.present(alertVc, animated: true, completion: nil)    }}class PickerViewBuilder : UIPickerView, UIPickerViewDelegate,UIPickerViewDataSource {    fileprivate var rowAndComponentCallBack:PopPickerViewCallBackClosure?//选择内容回调    lazy var currentSelectRow : NSInteger = 0    lazy var dataArr = NSMutableArray()    override init(frame: CGRect) {        super.init(frame: frame)    }        convenience init(frame:CGRect,dataSource:NSArray,contentCallBack:PopPickerViewCallBackClosure?) {        self.init(frame: frame)        self.backgroundColor = UIColor.white        self.dataArr = NSMutableArray.init(array: dataSource)        self.selectedRow(inComponent: 0)        self.delegate = self        self.dataSource = self    }        required init?(coder aDecoder: NSCoder) {        fatalError("init(coder:) has not been implemented")    }        func numberOfComponents(in pickerView: UIPickerView) -> Int {        return 1    }        func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {        return dataArr.count    }        func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {        //设置分割线        for view in pickerView.subviews {            if view.frame.size.height <= 1 {                view.isHidden = false                view.frame = CGRect(x: 0, y: view.frame.origin.y, width: UIScreen.main.bounds.size.width, height: 1)                view.backgroundColor = colorWithHexString("0xe5e5e5")            }        }                var pickerLabel = view as? UILabel        if pickerLabel == nil {            pickerLabel = UILabel()            pickerLabel?.textAlignment = .center            if currentSelectRow == row {                pickerLabel?.font = UIFont.systemFont(ofSize: 16)                pickerLabel?.textColor = newColor(225, 185, 0)            }else{                pickerLabel?.font = UIFont.systemFont(ofSize: 12)                pickerLabel?.textColor = newColor(153, 153, 153)            }                    }        pickerLabel?.text = dataArr[row] as? String                return pickerLabel!    }            func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {        return dataArr[row] as? String    }        func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {        return 33    }        func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {        currentSelectRow = row        rowAndComponentCallBack!(dataArr[currentSelectRow] as? NSString)        self.reloadAllComponents()    }}

使用：

let pickerView = PopPickerView.init(frame: CGRect(x: 0, y: UIScreen.main.bounds.size.height, width: UIScreen.main.bounds.size.width, height: 256), dataSource: selectParams[indexPath.row - 1] as NSArray,title:titleArr[indexPath.row])pickerView.rowAndComponentCallBack = {(resultStr) in    print(resultStr as Any)        self.currentSelectCell?.rightSelectLabel.text = resultStr! as String    }pickerView.show()

效果图：

　　仅限于Component内容，想要多行，可自行扩展。

　　自定义弹窗、可修改分割线颜色、修改字体大小、修改字体颜色。