ios - iOS：如何在 SKStoreProductViewController 顶部放置一个按钮

Question

我想在 SKStoreProductViewController 的顶部放置一个自定义按钮。我像下面这样尝试过，但没有奏效。我想知道你是否可以给我任何建议。

SKStoreProductViewController *storeViewController = [[SKStoreProductViewController alloc] init];

UIBarButtonItem *shareButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
                                                                             target:self
                                                                             action:@selector(showShareDialog)];
storeViewController.navigationItem.rightBarButtonItem = shareButton;

storeViewController.delegate = self;
[self presentViewController:storeViewController animated:YES completion:^() {
    [storeViewController loadProductWithParameters:@{SKStoreProductParameterITunesItemIdentifier:appId}
                                   completionBlock:^(BOOL result, NSError *error) {}];
}];