How to hide share button in QLPreviewController using swift?

Question

I\'m using the below code to use QLPreviewcontroller to show some documents in my app,

let ql = QLPreviewController()
ql.dataSource = self
//ql.navigationIte         


        

Answer 1

I know this is an old question but I spend so many hours looking for a solution and came up with something that works.

So, for any one looking for the same thing as me. Here's my solution.

Codes are in objective-c but it'l be a simple conversion to Swift

First we create subclass of QLPreviewController and in the subclass override the following methods

Edit

Swift:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationItem.rightBarButtonItem = nil
    //For ipads the share button becomes a rightBarButtonItem
    self.navigationController?.toolbar?.isHidden = true
    //This hides the share item
    self.navigationController?.toolbar?.addObserver(self, forKeyPath: "hidden", options: NSKeyValueObservingOptionPrior, context: nil)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    self.navigationController?.toolbar?.removeObserver(self, forKeyPath: "hidden")
}

override func observeValue(forKeyPath keyPath: String, ofObject object: Any, change: [AnyHashable: Any], context: UnsafeMutableRawPointer) {
    var isToolBarHidden: Bool? = self.navigationController?.toolbar?.isHidden
    // If the ToolBar is not hidden
    if isToolBarHidden == nil {
        DispatchQueue.main.async(execute: {() -> Void in
            self.navigationController?.toolbar?.isHidden = true
        })
    }
}

self.navigationController?.pushViewController(qlPreviewController, animated: true)

Objective-C:

-(void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.navigationItem.rightBarButtonItem = nil; //For ipads the share button becomes a rightBarButtonItem
    [[self.navigationController toolbar] setHidden:YES]; //This hides the share item
    [[self.navigationController toolbar] addObserver:self forKeyPath:@"hidden" options:NSKeyValueObservingOptionPrior context:nil];
}

Remove the Observer on viewWillDisappear

-(void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [[self.navigationController toolbar] removeObserver:self forKeyPath:@"hidden"];
}

And the observer method: Required because when you single tap the image to hide the navigation bar and toolbar, the share button becomes visible again on tap.

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{

    BOOL isToolBarHidden = [self.navigationController toolbar].hidden;
    // If the ToolBar is not hidden
    if (!isToolBarHidden) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [[self.navigationController toolbar] setHidden:YES];
        });
    }
}

And the PreviewController has to be pushed from you existing navigationController

[self.navigationController pushViewController:qlPreviewController animated:YES];

And also we have to use the subclass instead of QLPreviewController.