swift 实现QQ好友列表功能

import UIKit

class QQFriend: NSObject {
    var name: String?
    var intro: String?
    
    init(dic: NSDictionary) {
        super.init()
        self.setValuesForKeys(dic as! [String : AnyObject])
    }
}

import UIKit

class QQFriendGroup: NSObject {
    var name: String?
    var friends: NSArray?
    var isOpen: Bool? = false
    
    init(withDic dic: NSDictionary) {
        super.init()
        self.setValuesForKeys(dic as! [String : AnyObject])
        let arrayFriend: NSMutableArray = NSMutableArray()
        
        for friendDic in self.friends! {
            let friend : QQFriend = QQFriend.init(dic: friendDic as! NSDictionary)
            arrayFriend.add(friend)
        }
        self.friends = arrayFriend
    }

}

import UIKit
//协议
protocol QQHeaderViewDelegate: NSObjectProtocol {
    func headerViewDidClickedNameLab(headerView:QQHeaderView)
}

class QQHeaderView: UITableViewHeaderFooterView {
    weak var delegate:QQHeaderViewDelegate?

    var nameLabel: UILabel? = {
       let nameLabel = UILabel()
       return nameLabel
    }()
    
    var arrow: UIImageView? = {
        let arrow = UIImageView.init(image: UIImage(named: "orderDown"))
        return arrow
    }()
    
    var group: QQFriendGroup? {
        didSet {
            self.nameLabel?.text = group?.name
            didMoveToSuperview()
        }
    }
    
    var clickNameBlock: ((Void)->())? = nil
    var dividerView : UIView! = nil
    
    class func headerViewWithTableView(tableview: UITableView) -> QQHeaderView {
        let headerID = "myHeader"
        var header = tableview.dequeueReusableHeaderFooterView(withIdentifier: headerID)
        if header == nil {
            header = QQHeaderView.init(reuseIdentifier: headerID)
        }
        return header as! QQHeaderView
    }
    
    override init(reuseIdentifier: String?) {
        super.init(reuseIdentifier: reuseIdentifier)
        
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(QQHeaderView.nameClick))
        self.nameLabel?.isUserInteractionEnabled = true
        self.arrow?.isUserInteractionEnabled = true
        self.contentView.addGestureRecognizer(tap)
        self.contentView.addSubview(nameLabel!)
        self.contentView.addSubview(arrow!)
        
        let divideView = UIFactory.create_AView()
        divideView.backgroundColor = UIColor.hrgb("cccccc")
        self.contentView.addSubview(divideView)
        self.dividerView = divideView
        
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    //点击展开或收起列表
    func nameClick() {
        self.group?.isOpen = !(self.group?.isOpen)!
//        if ((self.delegate?.responds(to: Selector(("headerViewDidClickedNameLab:")))) != nil) {
//            self.delegate?.headerViewDidClickedNameLab(headerView: self)
//        }
        if self.clickNameBlock != nil {
            self.clickNameBlock!()
        }
    }
    
    override func didMoveToSuperview() {
        super.didMoveToSuperview()
        if self.group?.isOpen == true {
            self.arrow?.transform = CGAffineTransform.init(rotationAngle: .pi)
        }else {
            self.arrow?.transform = CGAffineTransform.init(rotationAngle: 0)
        }
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        self.nameLabel?.snp.makeConstraints({ (make) in
            make.left.equalTo(15)
            make.top.equalTo(0)
            make.bottom.equalTo(0)
            make.right.equalTo(-30)
        })
        self.arrow?.snp.makeConstraints({ (make) in
            make.right.equalTo(-10)
            make.width.height.equalTo(14)
            make.centerY.equalTo(self.height * 0.5)
        })
        self.dividerView.snp.makeConstraints { (make) in
            make.height.equalTo(0.5)
            make.left.right.bottom.equalTo(0)
        }
    }

}

import UIKit

extension ImitationQQ {
    func numberOfSections(in tableView: UITableView) -> Int {
        return (self.groups?.count)!
    }
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        let group: QQFriendGroup = self.groups![section] as! QQFriendGroup
        return group.isOpen == true ? group.friends!.count : 0
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell : UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "default", for: indexPath)
        cell.textLabel?.text = "\(indexPath.section)" + "\(indexPath.row)"
        cell.selectionStyle = .none
        return cell
    }
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 40
    }
    func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
        return 0.01
    }
    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let header: QQHeaderView = QQHeaderView.headerViewWithTableView(tableview: tableView)
        header.delegate = self
        header.clickNameBlock = {
            self.tabView.reloadData()
        }
        header.group = self.groups![section] as? QQFriendGroup
        return header
    }
    
    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        return 44
    }
}

extension ImitationQQ {
    func headerViewDidClickedNameLab(headerView: QQHeaderView) {
        self.tabView.reloadData()
    }
}

class ImitationQQ: UIViewController, UITableViewDataSource, UITableViewDelegate, QQHeaderViewDelegate {
    var tabView: UITableView! = nil
    var dividerView : UIView! = nil
    lazy var groups : NSArray? = {
       var arr : NSMutableArray = NSMutableArray()
       for i in 0..<3 {
            let group: QQFriendGroup = QQFriendGroup.init(withDic: ["name":"\(i)" + "组", "friends":[["name":"00","intro":"挺好的"],["name":"01","intro":"挺好好的"],["name":"02","intro":"挺好好好的"],["name":"03","intro":"挺好好好好的"]]] as NSDictionary)
            arr.add(group)
       }
       return arr
    }()
    

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor.hrgb("f4f4f4")
        self.title = "好友列表"
        
        let tabView = UIFactory.create_ATableView(frame: CGRect.init(x: 0, y: 0.5, width: Screen_Width, height: kScreenHeight-64.5), delegate: self, dataSource: self, superView: self.view, type: .plain)
        tabView.backgroundColor = UIColor.hrgb("f4f4f4")
        tabView.register(UITableViewCell.self, forCellReuseIdentifier: "default")
        self.tabView = tabView
        
        let divideView = UIFactory.create_AView()
        divideView.frame = CGRect(x: 0, y: 0, width: Screen_Width, height: 0.5)
        divideView.backgroundColor = UIColor.hrgb("cccccc")
        self.view.addSubview(divideView)
        self.dividerView = divideView
        
    }

}