CollapsibleTableSectionViewController

A Swift library that helps you collapse table view sections.

Features

• Support collapsible sections in a table view
• Collapse all the sections by default (configurable)
• Keep only one section expanded (configurable)
• Auto resize table view cell
• Easy-to-use protocols for configuration

Requirements

• iOS 9.0+
• Xcode 10.0+
• Swift 4.2

Installation

Manual

Just clone and add the following Swift files to your project:

• CollapsibleTableSectionViewController.swfit
• CollapsibleTableViewHeader.swift

Cocoapods

• Make sure that you use latest stable Cocoapods version: pod --version
• If not, update it: sudo gem install cocoapods
• pod init in you project root dir
• nano Podfile, add:

use_frameworks! 
pod 'CollapsibleTableSectionViewController', '~> 2.0.1'

• Save it: ctrl-x, y, enter
• pod update
• Open generated .xcworkspace
• Don't forget to import CollapsibleTableSectionViewController: import CollapsibleTableSectionViewController!

Carthage

• nano Cartfile
• put github "jeantimex/CollapsibleTableSectionViewController" ~> 2.0.1 into Cartfile
• Save it: ctrl-x, y, enter
• Run carthage update
• Copy CollapsibleTableSectionViewController.framework from Carthage/Build/iOS to your project
• Make sure that CollapsibleTableSectionViewController is added in Embedded Binaries section of your target (or else you will get dyld library not loaded referenced from ... reason image not found error)
• Add import CollapsibleTableSectionViewController on top of your view controller's code

Usage

Step 1. Subclass CollapsibleTableSectionViewController

import CollapsibleTableSectionViewController

class ViewController: CollapsibleTableSectionViewController { ... }

Step 2. Conforms to the CollapsibleTableSectionDelegate protocol

extension ViewController: CollapsibleTableSectionDelegate { ... }

CollapsibleTableSectionDelegate Protocol

Most of the protocol methods are optional and they are very similar to UITableViewDataSource and UITableViewDelegate, here is a list of the available protocol methods:

1. optional func numberOfSections(_ tableView: UITableView) -> Int

Asks the data source to return the number of sections in the table view. Default is 1.

extension ViewController: CollapsibleTableSectionDelegate {
  func numberOfSections(_ tableView: UITableView) -> Int {
    return 10
  }
}

2. optional func collapsibleTableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int

Returns the number of rows (table cells) in a specified section. Default is 0.

extension ViewController: CollapsibleTableSectionDelegate {
  func collapsibleTableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 5
  }
}

3. optional func collapsibleTableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell

Returns the table cell at the specified index path. You can also use your custom cells, see our example projects for more details.

extension ViewController: CollapsibleTableSectionDelegate {
  func collapsibleTableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as UITableViewCell? ?? UITableViewCell(style: .default, reuseIdentifier: "Cell")
    cell.textLabel?.text = "Cell Text"
    return cell
  }
}

4. optional func shouldCollapseByDefault(_ tableView: UITableView) -> Bool

Return true if you would like collapse all the sections when the table is loaded. Default is false.

5. optional func shouldCollapseOthers(_ tableView: UITableView) -> Bool

Return true if you would like to keep only one extended section (like accordion style). Default is false.

6. optional func collapsibleTableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?

The title for each section. Default is nil.

7. optional func collapsibleTableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)

Tells the delegate that the specified row is now selected.

Examples

Run the Examples project in this repo and you will find the following demos that help you get up and running:

1. Basic: The minimal working example
2. Custom Cell: Implement a custom cell programmatically
3. Collapse By Default: All sections are collapsed by default
4. Collapse Others: Accordion-style table view that only keeps one section expanded at a time

For more details of how to implement collapsible table sections using Swift, please checkout this repo for more information: https://github.com/jeantimex/ios-swift-collapsible-table-section.

Contribution

Anyone who would like to contribute to the project is more than welcome.

• Fork this repo
• Make your changes
• Submit pull request

License

MIT License

Copyright (c) 2017 Yong Su @jeantimex

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.