How to hide the “back” button in UINavigationContr

问题:

Do you know how to hide the 'back' button in a UINavigationController? Also, how to show it back, but I guess that's very similar to hiding it...

Just like the mail application does on the iPhone when you hit 'Edit' while viewing emails.

回答1:

I just found out the answer, in a controller use this:

[self.navigationItem setHidesBackButton:YES animated:YES];

And to restore it:

[self.navigationItem setHidesBackButton:NO animated:YES];

--

[UPDATE]

Swift 3.0:

self.navigationItem.setHidesBackButton(true, animated:true)

回答2:

Add this Code

[self.navigationItem setHidesBackButton:YES];

回答3:

In addition to removing the back button (using the methods already recommended), don't forget the user can still 'pop' to the previous screen with a left-to-right swipe gesture in iOS 7 and later.

To disable that (when appropriate), implement the following (in viewDidLoad for example):

 if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
     self.navigationController.interactivePopGestureRecognizer.enabled = NO;

回答4:

For hiding and showing the Back button conditionally you can use following code:

-(void)viewDidAppear:(BOOL)animated
{
    if ([tempAry count]==0)
    {
        [self.navigationItem setHidesBackButton:YES animated:YES];
    }
    else
    {
        [self.navigationItem setHidesBackButton:NO animated:YES];
    }
    [super viewDidAppear:animated];
} 

Note: in some cases, you have to put it in viewDidAppear method instead of viewWillAppear such cases like: when you are updating array of next class into previous class and then checking condition into next class as above.

回答5:

Just to clarify existing answers: the hidesBackButton property is the right answer, but it isn't clear in many answers what self refers to. Basically you should set self.navigationItem.hidesBackButton = YES in the view controller that is about to get pushed (or just got pushed) onto the UINavigationController.

In other words, say I have a UINavigationController named myNavController. I want to put a new view on it, and when I do I don't want the back button to show anymore. I could do something like:

UIViewController *newVC = [[UIViewController alloc] init];
//presumably would do some stuff here to set up the new view controller
newVC.navigationItem.hidesBackButton = YES;
[myNavController pushViewController:newVC animated:YES];

When the code finishes, the view controlled by newVC should now be showing, and no back button should be visible.

回答6:

Swift iOS (I have used following)

// hide back button
        self.navigationItem.setHidesBackButton(true, animated: false)

// pgrm mark ----- ------

    // hide the back button for this view controller

    override func setEditing(editing: Bool, animated: Bool) {
        super.setEditing(editing, animated: animated)

        self.navigationItem.setHidesBackButton(editing, animated: animated)

    }// end setEditing

回答7:

sethidesbackbutton did not work for me for some reason

I used this way ->

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:[[UIView alloc]initWithFrame:CGRectMake(0, 0, 20, 30)]] ;

回答8:

Always use Apple Documentation for simple issues they are more straightforward and lightweight :)

Here is the syntax for Swift 3.0:

self.navigationItem.setHidesBackButton(true, animated:true)

Reference

https://developer.apple.com/reference/uikit/uinavigationitem#//apple_ref/occ/instm/UINavigationItem/setHidesBackButton:animated:

回答9:

In my case I had few issues with current answers:

• inside viewDidLoad/viewWillAppear only back icon was hidden and the string "Back" was inactive but still visible
• inside viewDidAppear the back button disappeared...but I did not want the user to see it at all

So the solution that finally have worked for me is:

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];

    if (self) {
        [self.navigationItem setHidesBackButton:YES animated:NO];
    }

    return self;
}

回答10:

The solution suggest by Zoran Simic didn't work for me for some reason.

This code did work however:

MyController* controller   =   [[MyController alloc]  init];
NSArray* array             =   [[[NSArray alloc] initWithObjects:controller, nil] autorelease];

[self.navigationController setViewControllers:array animated:NO];

[controller release];

Obviously you'd have to manipulate an NSArray to your taste to make it work for you. Hope that helps somebody :)

回答11:

In my UIViewController subclass I have this method:

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

    // hide back button in edit mode
    [self.navigationItem setHidesBackButton:editing animated:YES];
}

回答12:

This hides the back button and replaces it with an add button in Swift:

override func setEditing(_ editing: Bool, animated: Bool) {
    super.setEditing(editing, animated: animated)

    // This hides the back button while in editing mode, which makes room for an add item button
    self.navigationItem.setHidesBackButton(editing, animated: animated)

    if editing {
        // This adds the add item button
        let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addTapped))
        // Use the animated setter for the left button so that add button fades in while the back button fades out
        self.navigationItem.setLeftBarButton(addButton, animated: animated)
        self.enableBackGesture(enabled: false)
    } else {
        // This removes the add item button
        self.navigationItem.setLeftBarButton(nil, animated: animated)
        self.enableBackGesture(enabled: true)
    }
}

func enableBackGesture(enabled: Bool) {
    // In addition to removing the back button and adding the add item button while in edit mode, the user can still exit to the previous screen with a left-to-right swipe gesture in iOS 7 and later. This code disables this action while in edit mode.
    if let navigationController = self.navigationController {
        if let interactivePopGestureRecognizer = navigationController.interactivePopGestureRecognizer {
            interactivePopGestureRecognizer.isEnabled = enabled
        }
    }
}

回答13:

Swift 3.

Generally, you should use Apple's per-ViewController API as described many times already on this page, but sometimes you need immediate control of the Back button.

The following code hides the Back button and ensures that tap collision detection doesn't occur in the hidden button region.

let emptyView = UIView(frame: .zero)
self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: emptyView)

回答14:

This hides the back button

let backBtn = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: navigationController, action: nil)


navigationItem.leftBarButtonItem = backBtn