iOS UITableView展开缩放动画实例代码

//
// HeaderViewTapAnimationController.swift
// Swift-Animations
//
// Created by YouXianMing on 16/8/9.
// Copyright © 2016年 YouXianMing. All rights reserved.
//

import UIKit

class HeaderViewTapAnimationController: NormalTitleViewController, UITableViewDelegate, UITableViewDataSource {
 
 private var classes   : [ClassModel]!
 private var tableView   : UITableView!
 private var sectionFirstLoad : Bool!
 private weak var tmpHeadView : ClassHeaderView!
 
 override func setup() {
  
  super.setup()
  
  sectionFirstLoad = false
  
  // TableView.
  tableView      = UITableView(frame: (contentView?.bounds)!)
  tableView.dataSource   = self
  tableView.delegate   = self
  tableView.rowHeight   = 60
  tableView.sectionHeaderHeight = 30
  tableView.separatorStyle  = .None
  contentView?.addSubview(tableView!)
  
  // Register.
  ClassHeaderView.registerToTableView(tableView)
  StudentInfoCell.registerToTableView(tableView)
  
  // Data source.
  let Aitna = ClassModel(className: "Aitna")
  Aitna.expend = false
  Aitna.students?.append(StudentModel(name: "Y.X.M.", age: 27))
  Aitna.students?.append(StudentModel(name: "Leif", age: 12))
  Aitna.students?.append(StudentModel(name: "Lennon", age: 23))
  Aitna.students?.append(StudentModel(name: "Jerome", age: 19))
  Aitna.students?.append(StudentModel(name: "Isidore", age: 15))
  
  let Melete = ClassModel(className: "Melete")
  Melete.expend = false
  Melete.students?.append(StudentModel(name: "Merle", age: 17))
  Melete.students?.append(StudentModel(name: "Paddy", age: 31))
  Melete.students?.append(StudentModel(name: "Perry", age: 59))
  Melete.students?.append(StudentModel(name: "Philip", age: 23))
  
  let Aoede = ClassModel(className: "Aoede")
  Aoede.expend = false
  Aoede.students?.append(StudentModel(name: "Verne", age: 12))
  Aoede.students?.append(StudentModel(name: "Vincent", age: 89))
  Aoede.students?.append(StudentModel(name: "Walter", age: 43))
  Aoede.students?.append(StudentModel(name: "Zachary", age: 21))

  let Dione = ClassModel(className: "Dione")
  Dione.expend = false
  Dione.students?.append(StudentModel(name: "Timothy", age: 72))
  Dione.students?.append(StudentModel(name: "Roderick", age: 34))
  Dione.students?.append(StudentModel(name: "Quentin", age: 12))
  Dione.students?.append(StudentModel(name: "Paddy", age: 75))
  
  let Adanos = ClassModel(className: "Adanos")
  Adanos.expend = false
  Adanos.students?.append(StudentModel(name: "Mortimer", age: 43))
  Adanos.students?.append(StudentModel(name: "Michael", age: 64))
  Adanos.students?.append(StudentModel(name: "Kevin", age: 23))
  Adanos.students?.append(StudentModel(name: "Jeremy", age: 21))
  
  classes = [ClassModel]()
  classes.append(Aitna)
  classes.append(Melete)
  classes.append(Aoede)
  classes.append(Dione)
  classes.append(Adanos)
  
  // Expend animations.
  GCDQueue.executeInMainQueue({ 
   
   self.sectionFirstLoad = true
   self.tableView.insertSections(NSIndexSet(indexesInRange: NSMakeRange(0, self.classes.count)), withRowAnimation: .Fade)
   
   GCDQueue.executeInMainQueue({
    
    self.tmpHeadView.buttonEvent()
    
    }, afterDelaySeconds: 0.4)
   }, afterDelaySeconds: 0.3)
 }
 
 // MARK: UITableView's delegate & dataSource.
 
 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
  
  let classModel = classes[section]
  if classModel.expend == true {
   
   return (classModel.students?.count)!
   
  } else {
  
   return 0
  }
 }
 
 func numberOfSectionsInTableView(tableView: UITableView) -> Int {
  
  if sectionFirstLoad == false {
   
   return 0
   
  } else {
  
   return classes.count
  }
 }
 
 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
  
  let classModel  = classes[indexPath.section]
  let customCell  = tableView.dequeueReusableCellWithIdentifier("StudentInfoCell") as! CustomCell
  customCell.data  = classModel.students![indexPath.row]
  customCell.indexPath = indexPath
  customCell.loadContent()
  
  return customCell
 }
 
 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
  
  tableView.selectedEventWithIndexPath(indexPath)
 }
 
 func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
  
  let headerView  = tableView.dequeueReusableHeaderFooterViewWithIdentifier("ClassHeaderView") as! ClassHeaderView
  headerView.section = section
  headerView.data  = classes[section]
  headerView.tableView = tableView
  headerView.loadContent()
  
  if tmpHeadView == nil && section == 0 {
   
   tmpHeadView = headerView
  }
  
  return headerView
 }
}