ここでのコードは、RootViewController から起動されるモーダル ビューであり、ムービーの下にサムネイル フィルムストリップを含むビデオを表示し、次にムービーにバインドされた時間指定された指示を表示します。
それはすべて機能しますが、メモリリーク/リリースの欠如があり、それを見て、3日間かけて修正しようとしただけではわかりません。助けを求める時が来ました...
コメントアウトして NSNotificationCenter を無効にすると (.m で強調表示されます)、メモリに関する問題は発生せず、時間指定されたテキストが保持されます。しかし、サムネイルもありません。[[NSNotificationCenter alloc] removeObserver:self];私はそれが私のためにそれを取り除くかどうかを確認するために多くのポイントで挿入しようと しました. しかし、残念ながら、役に立ちませんでした。
「backgroundTimer」もリリースしようとしましたが、コンパイルして実行しようとしてもあまり感銘を受けませんでした。
本質的に、モーダル ビューを初めてロードするときは、まったく問題はなく、すべてが素晴らしいよう-(IBAction)close:(id)sender;に見えます。約 30% (サムネイル生成で使用される量とほぼ同じ) 増加し、モーダル ビューを再起動するたびにほぼ同じ量だけ増加します。
私はこれに初心者であり、エラーは知っている人にとっては血まみれのばかげたものである可能性が高いことを心に留めておいてください. しかし、このプロジェクトを成功させるためには、あなたが私に投げかけてくる嫌がらせは喜んで受け入れます。
コードは次のとおりです。
.h
#import <UIKit/UIKit.h>
#import <MediaPlayer/MPMoviePlayerController.h>
#import "ImageViewWithTime.h"
#import "CommentView.h"
@interface SirloinVideoViewController_iPad : UIViewController {
UIView *landscapeView;
UIView *viewForMovie;
MPMoviePlayerController *player;
UILabel *onScreenDisplayLabel;
UIScrollView *myScrollView;
NSMutableArray *keyframeTimes;
NSArray *shoutOutTexts;
NSArray *shoutOutTimes;
NSTimer *backgroundTimer;
UIView *instructions;
}
-(IBAction)close:(id)sender;
-(IBAction)textInstructions:(id)sender;
@property (nonatomic, retain) IBOutlet UIView *instructions;
@property (nonatomic, retain) NSTimer *theTimer;
@property (nonatomic, retain) NSTimer *backgroundTimer;
@property (nonatomic, retain) IBOutlet UIView *viewForMovie;
@property (nonatomic, retain) MPMoviePlayerController *player;
@property (nonatomic, retain) IBOutlet UILabel *onScreenDisplayLabel;
@property (nonatomic, retain) IBOutlet UIScrollView *myScrollView;
@property (nonatomic, retain) NSMutableArray *keyframeTimes;
-(NSURL *)movieURL;
- (void) playerThumbnailImageRequestDidFinish:(NSNotification*)notification;
- (ImageViewWithTime *)makeThumbnailImageViewFromImage:(UIImage *)image andTimeCode:(NSNumber *)timecode;
- (void)handleTapFrom:(UITapGestureRecognizer *)recognizer;
@end
.m
#import "SirloinVideoViewController_iPad.h"
#import "SirloinTextViewController.h"
@implementation SirloinVideoViewController_iPad
@synthesize theTimer, backgroundTimer, viewForMovie, player,
onScreenDisplayLabel, myScrollView, keyframeTimes, instructions;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
}
return self;
[nibNameOrNil release];
[nibBundleOrNil release];
}
- (IBAction)close:(id)sender{
[self.parentViewController dismissModalViewControllerAnimated:YES];
[player stop];
[player release];
[theTimer invalidate];
[theTimer release];
[backgroundTimer invalidate];
[SirloinVideoViewController_iPad release];
}
—</p>
-(IBAction)textInstructions:(id)sender {
SirloinTextViewController *vController = [[SirloinTextViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:vController animated:YES];
[vController release];
}
- (void)viewDidLoad {
[super viewDidLoad];
keyframeTimes = [[NSMutableArray alloc] init];
shoutOutTexts = [[NSArray
arrayWithObjects:
@"1. XXXXXXXXXXXX",
@"2. XXXXXXXXXXXX",
@"3. XXXXXXXXXXXX",
@"4. XXXXXXXXXXXX",
@"5. XXXXXXXXXXXX",
@"6. XXXXXXXXXXXX"
@"7. XXXXXXXXXXXX",
@"8. XXXXXXXXXXXX",
@"9. XXXXXXXXXXXX",
@"10. XXXXXXXXXXXX",
@"11. XXXXXXXXXXXX",
@"12. XXXXXXXXXXXX",
@"13. XXXXXXXXXXXX",
@"14. XXXXXXXXXXXX",
@"15. XXXXXXXXXXXX",
nil] retain];
shoutOutTimes = [[NSArray
arrayWithObjects:
[[NSNumber alloc] initWithInt: 1],
[[NSNumber alloc] initWithInt: 73],
[[NSNumber alloc] initWithInt: 109],
[[NSNumber alloc] initWithInt: 131],
[[NSNumber alloc] initWithInt: 205],
[[NSNumber alloc] initWithInt: 250],
[[NSNumber alloc] initWithInt: 337],
[[NSNumber alloc] initWithInt: 378],
[[NSNumber alloc] initWithInt: 402],
[[NSNumber alloc] initWithInt: 420],
[[NSNumber alloc] initWithInt: 448],
[[NSNumber alloc] initWithInt: 507],
[[NSNumber alloc] initWithInt: 531],
[[NSNumber alloc] initWithInt: 574],
nil] retain];
self.player = [[MPMoviePlayerController alloc] init];
self.player.contentURL = [self movieURL];
self.player.view.frame = self.viewForMovie.bounds;
self.player.view.autoresizingMask =
UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleHeight;
[self.viewForMovie addSubview:player.view];
backgroundTimer = [NSTimer scheduledTimerWithTimeInterval:0.5f target:self selector:@selector(timerAction:) userInfo:nil repeats:YES];
[self.view addSubview:self.myScrollView];
//I am pretty sure that this is the culprit - Just not sure why...
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(movieDurationAvailable:)
name:MPMovieDurationAvailableNotification
object:theTimer];
//Could be wrong, but when commented out I don't have the memory issues
}
—</p>
- (NSInteger)positionFromPlaybackTime:(NSTimeInterval)playbackTime
{
NSInteger position = 0;
for (NSNumber *startsAt in shoutOutTimes)
{
if (playbackTime > [startsAt floatValue])
{
++position;
}
}
return position;
}
-(NSURL *)movieURL
{
NSBundle *bundle = [NSBundle mainBundle];
NSString *moviePath =
[bundle
pathForResource:@"sirloin"
ofType:@"m4v"];
if (moviePath) {
return [NSURL fileURLWithPath:moviePath];
} else {
return nil;
}
}
NSTimeInterval lastCheckAt = 0.0;
- (void)timerAction: theTimer
{
int count = [shoutOutTimes count];
NSInteger position = [self positionFromPlaybackTime:self.player.currentPlaybackTime];
NSLog(@"position is at %d", position);
if (position > 0)
{
--position;
}
if (position < count)
{
NSNumber *timeObj = [shoutOutTimes objectAtIndex:position];
int time = [timeObj intValue];
NSLog(@"shout scheduled for %d", time);
NSLog(@"last check was at %g", lastCheckAt);
NSLog(@"current playback time is %g", self.player.currentPlaybackTime);
if (lastCheckAt < time && self.player.currentPlaybackTime >= time)
{
NSString *shoutString = [shoutOutTexts objectAtIndex:position];
NSLog(@"shouting: %@", shoutString);
CommentView *cview = [[CommentView alloc] initWithText:shoutString];
[self.instructions addSubview:cview];
[shoutString release];
}
}
lastCheckAt = self.player.currentPlaybackTime;
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
-(void)removeObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath {
[[NSNotificationCenter defaultCenter] removeObserver:MPMovieDurationAvailableNotification];
[[NSNotificationCenter defaultCenter] removeObserver:MPMoviePlayerThumbnailImageRequestDidFinishNotification];
[keyPath release];
}
- (void) movieDurationAvailable:(NSNotification*)notification {
float duration = [self.player duration];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(playerThumbnailImageRequestDidFinish:)
name:MPMoviePlayerThumbnailImageRequestDidFinishNotification
object:nil];
NSMutableArray *times = [[NSMutableArray alloc] init];
for(int i = 0; i < 20; i++) {
float playbackTime = i * duration/20;
[times addObject:[NSNumber numberWithInt:playbackTime]];
}
[self.player
requestThumbnailImagesAtTimes:times
timeOption: MPMovieTimeOptionExact];
}
- (void) playerThumbnailImageRequestDidFinish:(NSNotification*)notification {
NSDictionary *userInfo = [notification userInfo];
NSNumber *timecode =
[userInfo objectForKey: MPMoviePlayerThumbnailTimeKey];
UIImage *image =
[userInfo objectForKey: MPMoviePlayerThumbnailImageKey];
ImageViewWithTime *imageView =
[self makeThumbnailImageViewFromImage:image andTimeCode:timecode];
[myScrollView addSubview:imageView];
UITapGestureRecognizer *tapRecognizer =
[[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(handleTapFrom:)];
[tapRecognizer setNumberOfTapsRequired:1];
[imageView addGestureRecognizer:tapRecognizer];
[tapRecognizer release];
[image release];
[imageView release];
}
- (void)handleTapFrom:(UITapGestureRecognizer *)recognizer {
ImageViewWithTime *imageView = (ImageViewWithTime *) recognizer.view;
self.player.currentPlaybackTime = [imageView.time floatValue];
}
- (ImageViewWithTime *)makeThumbnailImageViewFromImage:(UIImage *)image andTimeCode:(NSNumber *)timecode {
float timeslice = self.player.duration / 3.0;
int pos = [timecode intValue] / (int)timeslice;
float width = 75 *
((float)image.size.width / (float)image.size.height);
self.myScrollView.contentSize =
CGSizeMake((width + 2) * 13, 75);
ImageViewWithTime *imageView =
[[ImageViewWithTime alloc] initWithImage:image];
[imageView setUserInteractionEnabled:YES];
[imageView setFrame:CGRectMake(pos * width + 2, 0, width, 75.0f)];
imageView.time = [[NSNumber alloc] initWithFloat:(pos * timeslice)];
return imageView;
[myScrollView release];
}
- (void)dealloc {
[player release];
[viewForMovie release];
[onScreenDisplayLabel release];
[keyframeTimes release];
[instructions release];
[shoutOutTexts release];
[shoutOutTimes release];
[super dealloc];
}
@end
このアプリはすでに UIWebView (単純な sux) を大量に使用しているため、正しく実行しようとしています。