QuickTime Kit Programming Guide - filibeto.org

C H A P T E R 3
Extending the QTKitPlayer Application
// update/save
if (saveOperation == NSSaveOperation)
success = [mMovie updateMovieFile];
else
success = [super writeWithBackupToFile:fullDocumentPath ofType:type
saveOperation:saveOperation];
}
return success;
12. Add these lines of code:
- (NSData *)dataRepresentationOfType:(NSString *)docType
{
return [mMovie movieFormatRepresentation];
}
13. Add these lines to handle reading the movie from a file:
- (BOOL)readFromFile:(NSString *)fileName ofType:(NSString *)type
{
BOOL success = NO;
NSData *data;
}
// read the movie
if ([QTMovie canInitWithFile:fileName])
{
if ([type isEqualTo:@"MovieDocumentData"])
{
data = [NSData dataWithContentsOfFile:fileName];
}
}
else
{
[self setMovie:((QTMovie *)[QTMovie movieWithFile:fileName])];
success = (mMovie != nil);
}
return success;
14. The following chunk of code is intended to deal with opening movies and other media that
QuickTime “understands” using an instance method and setting a flag. Add these lines:
- (id)openDocumentWithContentsOfFile:(NSString *)fileName
display:(BOOL)displayFlag
{
// first check whether we already have a document for this file
NSDocumentController *sharedDocController = [NSDocumentController
sharedDocumentController];
MovieDocument *movieDocument = [sharedDocController
documentForFileName:fileName];
if (movieDocument)
{// we've got one, just bring it forward
if (displayFlag)
{
52 Adding Code to MovieDocument.m
2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.