Alex Jiang

September 1, 2014

NSNotification

What is Notification

• It’s a message sent to one or more observing objects to inform them of an event in a program
• a way for an object that initiates or handles a program event to communicate with any number of objects that want to know about that event.
• A blind structured way of communication (notification doesn’t have to know what those observers are)
• A broadcast radio station model in MVC
• A very similar idea like the event listener model in Java

September 1, 2014

View Controller Lifecycle (UIViewController_Class)

Overview

1. awakeFromNib, nib here means storyboard
2. outlets get set
3. viewDidLoad
4. viewWillLayoutSubviews: and viewDidLayoutSubviews:
5. viewWillAppear: and viewDidAppear: etc. (both repeatedly)
6. didReceiveMemoryWarning

August 31, 2014

Attributed String & UITextView in Objective-C

What is Attributed String

Determine how text will render on the screen. You can think of NSAttributedString as an NSString where each character has an NSDictionary of “attributes”.