Best tutorial in swift
https://www.letsbuildthatapp.com/course_video?id=2242
http://vasundharavision.com/blog/ios/expandable-tableview-without-third-party
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let kHeaderSectionTag: Int = 6900;
@IBOutlet weak var tableView: UITableView!
var expandedSectionHeaderNumber: Int = -1
var expandedSectionHeader: UITableViewHeaderFooterView!
var sectionItems: Array<Any> = []
var sectionNames: Array<Any> = []
override func viewDidLoad() {
super.viewDidLoad()
sectionNames = [ "iPhone", "iPad", "Apple Watch","iPhone", "iPad", "Apple Watch","iPhone", "iPad", "Apple Watch","iPhone", "iPad", "Apple Watch","iPhone", "iPad", "Apple Watch" ];
sectionItems = [ ["iPhone 5", "iPhone 5s", "iPhone 6", "iPhone 6 Plus", "iPhone 7", "iPhone 7 Plus"],
["iPad Mini", "iPad Air 2", "iPad Pro", "iPad Pro 9.7"],
["Apple Watch", "Apple Watch 2", "Apple Watch 2 (Nike)"], ["iPhone 5", "iPhone 5s", "iPhone 6", "iPhone 6 Plus", "iPhone 7", "iPhone 7 Plus"],
["iPad Mini", "iPad Air 2", "iPad Pro", "iPad Pro 9.7"],
["Apple Watch", "Apple Watch 2", "Apple Watch 2 (Nike)"], ["iPhone 5", "iPhone 5s", "iPhone 6", "iPhone 6 Plus", "iPhone 7", "iPhone 7 Plus"],
["iPad Mini", "iPad Air 2", "iPad Pro", "iPad Pro 9.7"],
["Apple Watch", "Apple Watch 2", "Apple Watch 2 (Nike)"], ["iPhone 5", "iPhone 5s", "iPhone 6", "iPhone 6 Plus", "iPhone 7", "iPhone 7 Plus"],
["iPad Mini", "iPad Air 2", "iPad Pro", "iPad Pro 9.7"],
["Apple Watch", "Apple Watch 2", "Apple Watch 2 (Nike)"], ["iPhone 5", "iPhone 5s", "iPhone 6", "iPhone 6 Plus", "iPhone 7", "iPhone 7 Plus"],
["iPad Mini", "iPad Air 2", "iPad Pro", "iPad Pro 9.7"],
["Apple Watch", "Apple Watch 2", "Apple Watch 2 (Nike)"]
];
self.tableView!.tableFooterView = UIView()
}
override func viewWillAppear(_ animated: Bool)
{
super.viewWillAppear(animated)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Tableview Methods
func numberOfSections(in tableView: UITableView) -> Int {
if sectionNames.count > 0 {
tableView.backgroundView = nil
return sectionNames.count
} else {
let messageLabel = UILabel(frame: CGRect(x: 0, y: 0, width: view.bounds.size.width, height: view.bounds.size.height))
messageLabel.text = "Retrieving data.\nPlease wait."
messageLabel.numberOfLines = 0;
messageLabel.textAlignment = .center;
messageLabel.font = UIFont(name: "HelveticaNeue", size: 20.0)!
messageLabel.sizeToFit()
self.tableView.backgroundView = messageLabel;
}
return 0
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.expandedSectionHeaderNumber == section) {
let arrayOfItems = self.sectionItems[section] as! NSArray
return arrayOfItems.count;
} else {
return 0;
}
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if (self.sectionNames.count != 0) {
return self.sectionNames[section] as? String
}
return ""
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 44.0;
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat{
return 0;
}
func tableView(_ tableView: UITableView, willDisplayHeaderView view: UIView, forSection section: Int) {
//recast your view as a UITableViewHeaderFooterView
let header: UITableViewHeaderFooterView = view as! UITableViewHeaderFooterView
header.contentView.backgroundColor = UIColor.colorWithHexString(hexStr: "#0075d4")
header.textLabel?.textColor = UIColor.white
if let viewWithTag = self.view.viewWithTag(kHeaderSectionTag + section) {
viewWithTag.removeFromSuperview()
}
let headerFrame = self.view.frame.size
let theImageView = UIImageView(frame: CGRect(x: headerFrame.width - 32, y: 13, width: 18, height: 18));
theImageView.image = UIImage(named: "Chevron-Dn-Wht")
theImageView.tag = kHeaderSectionTag + section
header.addSubview(theImageView)
// make headers touchable
header.tag = section
let headerTapGesture = UITapGestureRecognizer()
headerTapGesture.addTarget(self, action: #selector(ViewController.sectionHeaderWasTouched(_:)))
header.addGestureRecognizer(headerTapGesture)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell", for: indexPath) as UITableViewCell
let section = self.sectionItems[indexPath.section] as! NSArray
cell.textLabel?.textColor = UIColor.black
cell.textLabel?.text = section[indexPath.row] as? String
return cell
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
// MARK: - Expand / Collapse Methods
@objc func sectionHeaderWasTouched(_ sender: UITapGestureRecognizer) {
let headerView = sender.view as! UITableViewHeaderFooterView
let section = headerView.tag
let eImageView = headerView.viewWithTag(kHeaderSectionTag + section) as? UIImageView
if (self.expandedSectionHeaderNumber == -1) {
self.expandedSectionHeaderNumber = section
tableViewExpandSection(section, imageView: eImageView!)
} else {
if (self.expandedSectionHeaderNumber == section) {
tableViewCollapeSection(section, imageView: eImageView!)
} else {
let cImageView = self.view.viewWithTag(kHeaderSectionTag + self.expandedSectionHeaderNumber) as? UIImageView
tableViewCollapeSection(self.expandedSectionHeaderNumber, imageView: cImageView!)
tableViewExpandSection(section, imageView: eImageView!)
}
}
}
func tableViewCollapeSection(_ section: Int, imageView: UIImageView) {
let sectionData = self.sectionItems[section] as! NSArray
self.expandedSectionHeaderNumber = -1;
if (sectionData.count == 0) {
return;
} else {
UIView.animate(withDuration: 0.4, animations: {
imageView.transform = CGAffineTransform(rotationAngle: (0.0 * CGFloat(Double.pi)) / 180.0)
})
var indexesPath = [IndexPath]()
for i in 0 ..< sectionData.count {
let index = IndexPath(row: i, section: section)
indexesPath.append(index)
}
self.tableView!.beginUpdates()
self.tableView!.deleteRows(at: indexesPath, with: UITableView.RowAnimation.fade)
self.tableView!.endUpdates()
}
}
func tableViewExpandSection(_ section: Int, imageView: UIImageView) {
let sectionData = self.sectionItems[section] as! NSArray
if (sectionData.count == 0) {
self.expandedSectionHeaderNumber = -1;
return;
} else {
UIView.animate(withDuration: 0.4, animations: {
imageView.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat(Double.pi)) / 180.0)
})
var indexesPath = [IndexPath]()
for i in 0 ..< sectionData.count {
let index = IndexPath(row: i, section: section)
indexesPath.append(index)
}
self.expandedSectionHeaderNumber = section
self.tableView!.beginUpdates()
self.tableView!.insertRows(at: indexesPath, with: UITableView.RowAnimation.fade)
self.tableView!.endUpdates()
}
}
}
No comments:
Post a Comment