IPhone MoviePlayer Sample Code 2

MyViewController

Interface

Imports:

• #import < MediaPlayer/MediaPlayer.h >
• #import "MyOverlayView.h"

The line 'extern NSString * const OverlayViewTouchNotification' creates a global constant that will be used for touches to the overlay view. Any class importing MyViewController can access this variable.

Instance variables:

• mMoviePlayer (MPMoviePlayerController)
• mMovieURL (NSURL)
• mOverlayView (MyOverlayView)

Instance methods:

• -(NSURL *)movieURL;
• -(void)initMoviePlayer;
• -(IBAction)playMovie:(id)sender;
• -(void)overlayViewTouches:(NSNotification *)notification;
• -(IBAction)overlayViewButtonPress:(id)sender;

Implementation

Imports:

• #import "MoviePlayerAppDelegate.h"

Initialise constant OverlayViewTouchNotification with the string 'overlayViewTouch'.

#pragma is a compiler directive. However the compiler ignores it if #pragma mark is used. #pragma mark helps with the organisation of your methods in the Xcode dropdown list.

'#pragma mark -' divvies up the methods by creating a spacer line while '#pragma mark Movie Player Routines' creates a bold label with the text 'Movie Player Routines'.

Movie Player Routines
- (void) moviePreloadDidFinish:(NSNotification*)notification
- (void) moviePlayBackDidFinish:(NSNotification*)notification
- (void) movieScalingModeDidChange:(NSNotification*)notification
These are events. When they are triggered is evident from the names. There is no code inside them.

-(void)initMoviePlayer

• Register MPMoviePlayerContentPreloadDidFinishNotification (named after the definition in MPMoviePlayerController.h) with NSNotificationCenter.
• The movie player object, mMoviePlayer, is created by allocating MPMoviePlayerController and initialising it with movieURL.
• Register MPMoviePlayerPlaybackDidFinishNotification and MPMoviePlayerScalingModeDidChangeNotification, giving mMoviePlayer as the notification sender.
• Obtain the MoviePlayerAppDelegate object and use its instance variables to set mMoviePlayer.
• Register OverlayViewTouchNotification.

-(IBAction)playMovie:(id)sender

• Play mMoviePlayer.
• Get the application windows in an array.
• Get the movie player window.
• Add mOverlayView as the subview of the movie player window.

View Controller Routines
-(NSURL *)movieURL

• Check mMovieURL whether it's null or not.
• Passing will return mMovieURL.
• Failing will get the main bundle, look for 'Movie.m4v', check it and convert the path to NSURL before assigning it to movieURL.

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation) interfaceOrientation
-(void)didReceiveMemoryWarning
-(void)overlayViewTouches:(NSNotification *)notification
-(IBAction)overlayViewButtonPress:(id)sender
Trivial or empty methods.

-(void)dealloc
Remove all registered notifications and release the movie player.