QuickTime Kit Programming Guide - filibeto.org

C H A P T E R 5
Extending the QTKitPlayer To Stream Audio and Video
3. You also want to define the maximum number of URLs, in this case 15. Insert this line:
#define kMaximumURLs 15
4. Now you want to add the following class methods to deal with opening the URL panel. Add
these lines:
+ (id)openURLPanel
{
if (openURLPanel == nil)
openURLPanel = [[self alloc] init];
return openURLPanel;
}
5. Next, you need to add initialization code to initialize an OpenURLPanel instance and listen for
application termination notifications. Add these lines:
- (id)init
{
[super init];
// init
[self setURLArray:[NSMutableArray arrayWithCapacity:10];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(writeURLs:) name:NSApplicationWillTerminateNotification
object:NSApp];
}
return self;
6. Insert the following code to handle deallocation of memory and notifications:
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[self setURLArray:nil];
[super dealloc];
}
7. To get the URL string, insert this chunk of code:
- (NSString *)urlString
{
NSString *urlString = nil;
}
// get the url
urlString = [mUrlComboBox stringValue];
if (urlString == nil)
urlString = [mUrlComboBox objectValueOfSelectedItem];
if ([urlString length] == 0)
urlString = nil;
return urlString;
90 Adding Code To Stream Audio and Video
2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.