Hide right button n QLPreviewController?

Question

I am subclassing QLPreviewController in my application and using the following code.

QLPreviewControllerSubClass* preview = [[QLPreviewControllerSubClass all         


        

Answer 1

I have found a solution to disable (not hide) therightBarButtonItem in QLPreviewController

The solution works fine for me in iOS8 and iOS9

You simply need to subclass QLPreviewController and override the following methods, then use your subclass instead of the original QLPreviewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // When coming back from background we make sure the share button on the rightbBarButtonItem is disabled
    __weak typeof(self) weakSelf = self;
    [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidBecomeActiveNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
        weakSelf.navigationItem.rightBarButtonItem.enabled = NO;
    }];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    self.navigationItem.rightBarButtonItem.enabled = NO; // Disable the share button
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    self.navigationItem.rightBarButtonItem.enabled = NO; // Disable the share button
}