QuickTime Kit Programming Guide - filibeto.org

C H A P T E R 6
Adding Multimedia Playback Capability
}
4. Define the actions you need before the @end directive in order to show movies in your window
and to show the window itself:
- (IBAction)doSetMovies:(id)sender;
- (IBAction)doShowViewTestsWindow:(id)sender;
That’s it. Save your ViewTestsController.h file.
Adding Code To Your ViewTestController.m
In this next sequence of steps, you’ll be adding a larger chunk of code to your ViewTestsController.m
implementation file.
To begin, in your QTKitPlayer project, choose File > New File. In the Assistant window for your new
file in Xcode 2.0, select Cocoa > Objective-C class and in the window that opens enter the title
ViewTestsController.m . Now follow these steps
1. Insert the following import line at the beginning of your file:
#import "ViewTestsController.h"
2. Following your import statement, you want to add this line:
@implementation ViewTestsController
3. You want to be notified when the window is closing so you can do a cleanup. Insert these lines
of code:
-(void)awakeFromNib
{
[ [NSNotificationCenter defaultCenter]
addObserver:self selector:@selector(closeWin:)
name:NSWindowWillCloseNotification object:mViewTestsWindow ];
}
4. Add this next block to specify if the movie is playing or not. If the movie is currently playing, it
returns YES. If not, it returns NO.
-(BOOL)isPlaying:(QTMovie *)aMovie
{
if ([aMovie rate == 0)
{
return NO;
}
return YES:
}
5. Next, you need to add code to stop the movie from playing. Add these lines:
-(void)stopPlayingMovie:(QTMovie *)aMovie
{
if ([self isPlaying:aMovie] == YES)
{
114 Adding Code To Display and Playback Multimedia
2005-11-09 | © 2004, 2005 Apple Computer, Inc. All Rights Reserved.