About This Fork
This fork contains some major changes from the main repository.
- XML & JSON extensions merged back to TTNetwork
- TTExtensionLoader removed
- Removed YAJL JSON support
- Removed old xcode templates
- Appledoc Documentation
- TTSplitViewController removed
- Major iOS 5 TTNaviagtor bug fixes
- iOS 3.1 support
Three20 is a collection of iPhone UI classes, like a photo viewer, and general utilities, like an HTTP disk cache. Three20 is derived from the Facebook iPhone app, which is one of the most downloaded iPhone apps ever.
If you would like to ask any questions regarding Three20, please check out any of the following:
You can access Three20 API documentation in several ways:
- Online: http://aporat.github.com/three20/api
- Within Xcode:
- Open your Xcode Preferences (
⌘,) and switch to Documentation tab.
- Click the
- Add the Three20 doc set feed:
- Open your Xcode Preferences (
- Generate the documentation from the project repository with the
An Overview of Three20
TTPhotoViewController emulates Apple's Photos app with all of its flick n' pinch delight. You can supply your own "photo sources", which works similiarly to the data sources used by UITableView. Unlike Apple's Photos app, it isn't limited to photos stored locally. Your photos can be loaded from the network, and long lists of photos can be loaded incrementally.
TTMessageController emulates the message composer in Apple's Mail app. You can customize it to send any kind of message you want. Include your own set of message fields, or use the standard "To:" and "Subject:". Recipient names can be autocompleted from a data source that you provide.
Web image views
TTImageView makes it as easy to display an image as it is in HTML. Just supply the URL of the image, and TTImageView loads it and displays it efficiently. TTImageView also works with the HTTP cache described below to avoid hitting the network when possible.
Internet-aware table view controllers
TTTableViewController and TTTableViewDataSource help you to build tables which load their content from the Internet. Rather than just assuming you have all the data ready to go, like UITableView does by default, TTTableViewController lets you communicate when your data is loading, and when there is an error or nothing to display. It also helps you to add a "More" button to load the next page of data, and optionally supports reloading the data by shaking the device.
Better text fields
TTTextEditor is a UITextView which can grow in height automatically as you type. I use this for entering messages in Facebook Chat, and it behaves similarly to the editor in Apple's SMS app.
TTPickerTextField is a type-ahead UITextField. As you type it searches a data source, and it adds bubbles into the flow of text when you choose a type-ahead option. I use this in TTMessageController for selecting the names of message recipients.
HTTP disk cache
TTURLRequest is a replacement for NSURLRequest which supports a disk cache (NSURLRequest can only cache in RAM). It has some other nice features too. HTTP posts are as easy as supplying a dictionary of parameters. The TTURL loading system can also be suspended and resumed at any time, which is a great performance helper. Network threads often fight with the UI thread, so you can suspend the network any time your app is momentarily graphically intensive.
TTNavigator is for those grizzled old web developers like myself who want to organize their app by "pages" which can be displayed by visiting a URL.
Your view controllers can simply register URL patterns that they handle, and when those URLs are visited the controllers will be created and displayed. You can also register generic actions that are called when a URL is visited.
TTNavigator also persists and restores the full path of navigation controllers and modal view controllers, so your users can quite the app and come back exactly where they left off.
Learn more at Three20.info