125 lines
3.9 KiB
Swift
125 lines
3.9 KiB
Swift
//
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// MainViewController.swift
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// HackerNews
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//
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// Copyright (c) 2014 Amit Burstein. All rights reserved.
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// See LICENSE for licensing information.
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//
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// Abstract:
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// Handles fetching and displaying posts from Hacker News.
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//
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import UIKit
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import QuartzCore
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class MainViewController: UIViewController, UITableViewDataSource {
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// MARK: Properties
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let postCellIdentifier = "PostCell"
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let showBrowserIdentifier = "ShowBrowser"
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var postFilter = PostFilterType.Top
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var posts = HNPost[]()
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var refreshControl = UIRefreshControl()
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@IBOutlet var tableView: UITableView
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// MARK: Lifecycle
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override func viewDidLoad() {
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super.viewDidLoad()
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configureUI()
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fetchPosts()
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}
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override func viewWillAppear(animated: Bool) {
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tableView.deselectRowAtIndexPath(tableView.indexPathForSelectedRow(), animated: animated)
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super.viewWillAppear(animated)
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}
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// MARK: Functions
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func configureUI() {
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refreshControl.addTarget(self, action: "fetchPosts", forControlEvents: .ValueChanged)
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refreshControl.attributedTitle = NSAttributedString(string: "Pull to Refresh")
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tableView.insertSubview(refreshControl, atIndex: 0)
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}
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func fetchPosts() {
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UIApplication.sharedApplication().networkActivityIndicatorVisible = true;
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HNManager.sharedManager().loadPostsWithFilter(postFilter, completion: { posts in
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if (posts != nil && posts.count > 0) {
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self.posts = posts as HNPost[]
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dispatch_async(dispatch_get_main_queue(), {
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self.tableView.reloadSections(NSIndexSet(index: 0), withRowAnimation: .Fade)
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self.refreshControl.endRefreshing()
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UIApplication.sharedApplication().networkActivityIndicatorVisible = false
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})
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} else {
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println("Could not fetch posts!")
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self.refreshControl.endRefreshing()
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UIApplication.sharedApplication().networkActivityIndicatorVisible = false;
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}
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})
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}
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func stylePostCellAsRead(cell: UITableViewCell) {
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cell.textLabel.textColor = UIColor(red: 119/255.0, green: 119/255.0, blue: 119/255.0, alpha: 1)
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cell.detailTextLabel.textColor = UIColor(red: 153/255.0, green: 153/255.0, blue: 153/255.0, alpha: 1)
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}
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// MARK: UITableViewDataSource
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func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {
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return posts.count
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}
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func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
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let cell = tableView.dequeueReusableCellWithIdentifier(postCellIdentifier) as UITableViewCell
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let post = posts[indexPath.row]
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if HNManager.sharedManager().hasUserReadPost(post) {
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stylePostCellAsRead(cell)
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}
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cell.textLabel.text = post.Title
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cell.detailTextLabel.text = "\(post.Points) points by \(post.Username)"
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return cell
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}
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// MARK: UIViewController
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override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject) {
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if segue.identifier == showBrowserIdentifier {
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let webView = segue.destinationViewController as BrowserViewController
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let cell = sender as UITableViewCell
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let post = posts[tableView.indexPathForCell(cell).row]
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HNManager.sharedManager().setMarkAsReadForPost(post)
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stylePostCellAsRead(cell)
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webView.post = post
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}
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}
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// MARK: IBActions
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@IBAction func changePostFilter(sender: UISegmentedControl) {
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switch sender.selectedSegmentIndex {
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case 0:
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postFilter = .Top
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fetchPosts()
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case 1:
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postFilter = .New
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fetchPosts()
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case 2:
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postFilter = .Ask
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fetchPosts()
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default:
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println("Bad segment index!")
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}
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}
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}
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