initWithNibName上的內存泄漏

Question

我的內存泄漏有問題。 在Instruments中，此行出現內存泄漏：

VDLPlaybackViewController *videoController = [[VDLPlaybackViewController alloc] initWithNibName:@"VDLPlaybackView" bundle:nil];

我不確定這可能是什么問題。 這是VDLPlaybackViewController.h的頭文件：

@protocol VDLPlaybackViewControllerDelegate <NSObject>
@required
-(void)playerShouldClose;
@end

@interface VDLPlaybackViewController : UIViewController <UIDocumentInteractionControllerDelegate>


@property (nonatomic, strong) id<VDLPlaybackViewControllerDelegate> delegate;

// content file stuff.
@property (nonatomic, strong) File *file;
@property (nonatomic, strong) NSNumber *contentID;
@property (nonatomic, strong) NSURL *fileURL;
@property (nonatomic, strong) NSString *pageTitle;

// layout stuff
@property (strong, nonatomic) IBOutlet NSLayoutConstraint *topTimeViewHeight;
@property (strong, nonatomic) IBOutlet NSLayoutConstraint *bottomControlViewHeight;

@property (nonatomic, strong) IBOutlet UIView *movieView;
@property (nonatomic, strong) IBOutlet UIView *navBarView;
@property (nonatomic, strong) IBOutlet UISlider *positionSlider;
@property (nonatomic, strong) IBOutlet UIButton *timeDisplay;
@property (nonatomic, strong) IBOutlet UIButton *playPauseButton;
@property (nonatomic, strong) IBOutlet UIButton *subtitleSwitcherButton;
@property (nonatomic, strong) IBOutlet UIButton *audioSwitcherButton;
@property (nonatomic, strong) IBOutlet UIButton *screenSizeSwitcherButton;
//@property (nonatomic, strong) IBOutlet UINavigationBar *toolbar;
@property (nonatomic, strong) IBOutlet UIView *controllerPanel;
@property (nonatomic, strong) IBOutlet UISlider *volumeSlider;
@property (nonatomic, strong) IBOutlet MPVolumeView *volumeView;
@property (nonatomic, strong) IBOutlet MPVolumeView *airplayView;

@property (nonatomic, assign) CGRect shareButtonFrame;
@property (nonatomic, strong) MultiFileShareButtonController *shareButtonController;
@property (nonatomic, strong) FavoriteFileButtonView *favoriteButtonController;
@property (nonatomic, strong) UIDocumentInteractionController *interactionController;
@property (nonatomic, assign) BOOL isDestroying;

- (void)setMediaURL:(NSURL*)theURL;

- (IBAction)closePlayback:(id)sender;

- (IBAction)positionSliderDrag:(id)sender;
- (IBAction)positionSliderAction:(id)sender;
- (IBAction)toggleTimeDisplay:(id)sender;

- (IBAction)playandPause:(id)sender;
//- (IBAction)switchAudioTrack:(id)sender;
//- (IBAction)switchSubtitleTrack:(id)sender;
- (IBAction)switchVideoDimensions:(id)sender;

@end

有誰知道是什么原因造成的？

Answer 1

檢測工具會告訴您以下行存在泄漏：

VDLPlaybackViewController *videoController = [[VDLPlaybackViewController alloc] initWithNibName:@"VDLPlaybackView" bundle:nil];

這並不是說，正是這條線導致了泄漏，該工具告訴您該變量的引用作為泄漏存在。

您應該查找傳遞了對VDLPlaybackViewController *videoController的強引用的實例。

您在問題中擁有的界面有一個小問題。 應該是弱而不是強

@property (nonatomic, weak) id<VDLPlaybackViewControllerDelegate> delegate;

找到更多這樣的實例，您已將VDLPlaybackViewController作為強大的引用委托傳遞給您，您將能夠解決此問題。

了解更多有關泄漏實際發生原因的信息。 瀏覽https://cocoacasts.com/what-are-strong-reference-cycles