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[in_app_purchase] fixed a memory leak error #5358

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fluttergithubbot merged 10 commits into from
May 17, 2022
Merged

[in_app_purchase] fixed a memory leak error #5358

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178f250
[in_app_purchase] fixed a memory leak error
yimao009 Apr 24, 2022
ccd4238
update pubspec.yaml version && CHANGELOG.md version
yimao009 Apr 24, 2022
3904c0e
fix： property week -> weak
yimao009 Apr 25, 2022
2dd1ecd
Delete unused code in InAppPurchasePlugin
yimao009 Apr 26, 2022
9e84b76
fix format
yimao009 Apr 26, 2022
cc21907
Merge branch 'main' into main
yimao009 May 13, 2022
93fc23e
Merge branch 'flutter:main' into main
yimao009 May 17, 2022
27ee54b
Update CHANGELOG.md
yimao009 May 17, 2022
0603856
Style fix
stuartmorgan-g May 17, 2022
2e67871
More style
stuartmorgan-g May 17, 2022
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fix： property week -> weak
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@yimao009
yimao009 committed Apr 25, 2022
commit 3904c0e35d9d2d344231b070794b93762421b532
2 changes: 1 addition & 1 deletion packages/in_app_purchase/in_app_purchase_storekit/ios/Classes/InAppPurchasePlugin.m
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ @interface InAppPurchasePlugin ()
// Callback channel to dart used for when a function from the payment queue delegate is triggered.
@property(strong, nonatomic, readonly) FlutterMethodChannel *paymentQueueDelegateCallbackChannel;

@property(week, nonatomic, readonly) NSObject<FlutterTextureRegistry> *registry;
@property(weak, nonatomic, readonly) NSObject<FlutterTextureRegistry> *registry;
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@cyanglaz cyanglaz Apr 25, 2022

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Looks like registry is unused in the plugin code and can be completely removed. "messenger" can also be removed with a little tweak in the code.

And it looks like registrar can be weak as the engine should keep a strong reference to the registrar and plugin should out live the engine.

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@yimao009 yimao009 Apr 26, 2022

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in_app_purchase may not be a problem in pure flutter projects, but in projects that natively access flutter, the engine cannot be effectively released, resulting in memory leaks, for example:

@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (nonatomic, strong) FlutterEngineGroup *engines;
@end
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        self.engines = [[FlutterEngineGroup alloc] initWithName:@"" project:nil];
        return YES;
}

Controller A

- (IBAction)pushNext:(id)sender {
    NextViewController *vc = [[NextViewController alloc] initWithEntryPoint:nil];
    [self.navigationController pushViewController:vc animated:YES];
}

Controller B

// .h
@interface NextViewController : FlutterViewController
- (instancetype)initWithEntryPoint:(NSString *)point ;
@end
// .m 
- (instancetype)initWithEntryPoint:(NSString *)point {
    AppDelegate *delegate = ((AppDelegate *)([UIApplication sharedApplication].delegate));

    FlutterEngine *engine = [delegate.engines makeEngineWithEntrypoint:point libraryURI:nil];
    [GeneratedPluginRegistrant registerWithRegistry:engine];
    if (self = [super initWithEngine:engine nibName:nil bundle:nil]) {}
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    
    self.channel = [FlutterMethodChannel methodChannelWithName:@"normal" binaryMessenger:self.engine.binaryMessenger];
}

When I pop NextViewController , the flutter engine is not released, I found that in_app_purchase caused by debug memory graph.
The registry is not used, I don't know why it is written like this, I think it can be deleted.

@property(strong, nonatomic, readonly) NSObject<FlutterBinaryMessenger> *messenger;
@property(strong, nonatomic, readonly) NSObject<FlutterPluginRegistrar> *registrar;

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