CODEWITHSUNDEEP
iosiphoneios7uinavigationbaruibarbuttonitem
Salman Zaidi
Salman Zaidi

Reputation: 9842

How to Edit Empty Spaces of Left, Right UIBarButtonItem in UINavigationBar [iOS 7]

I was using iOS 6.1 earlier, but now I have moved to iOS 7. Along with other problems, I have observed that in my navigation bar, the left space of left bar button item and right empty space of the right button bar item are quite more in IOS 7 than in iOS 6.

I need to know is there a way I can reduce empty spaces of left, right bar button items in navigation bar??

Upvotes: 84

Views: 60420

Answers (15)

user8637708
user8637708

Reputation: 3763

In iOS 17 and later

I found a solution by adding a negative space UIBarButtonItem and using CGAffineTransform to reposition the button without affecting its layout.

This way, the button stays in place and is still touchable near the screen’s edge.

let negativeSpace = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
negativeSpace.width = -16

leftItems.insert(negativeSpace, at: 0)

if leftItems.count > 1 {
    leftItems[1].customView?.transform = CGAffineTransform(translationX: -16, y: 0)
}

Upvotes: 0

tuandapen
tuandapen

Reputation: 284

This is my solution for Swift 3.0:

rightBtn.imageInsets = UIEdgeInsets(top: 0, left: -13.0, bottom: 0, right: 13.0) 
self.navigationItem.rightBarButtonItem = rightBtn

Upvotes: 9

junky
junky

Reputation: 25

worked for me

rightBarButton.customView?.transform = CGAffineTransform(translationX: 10, y: 0)

Upvotes: 1

Rafiqul Hasan
Rafiqul Hasan

Reputation: 3602

Negetive space won't work from iOS 11

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    // to remove navigation bar extra margin
    for view in (self.navigationController?.navigationBar.subviews)! {
        view.layoutMargins = UIEdgeInsets.zero
    }
}

Above code will remove margin from both side leftBarButtonItem and RightBarButtonItem. If you need to add extra margin(After removing margin) add following code

    let rightButton = UIButton(frame: CGRect(x: 0, y: 0, width: 17, height: 20))
    rightButton.setImage(UIImage(named: "ic_cart"), for: .normal)

    let rightBarButtomItem = UIBarButtonItem(customView: rightButton)

    let spacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.fixedSpace, target: nil, action: nil)
    spacer.width = 28 //This will add extra margin on right side
    navigationItem.rightBarButtonItems = [spacer,rightBarButtomItem]

Upvotes: 2

Adnan Aftab
Adnan Aftab

Reputation: 14477

I was also facing this problem. I also have feelings that in iOS 7 there is more space. And I figured out that this is about 10 points more. I usually use negative spaces when I want for LeftBarItemButton to start from the edge. This can be useful for you as well.

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];

negativeSpacer.width = -16; // it was -6 in iOS 6

[self.navigationItem setLeftBarButtonItems:@[negativeSpacer, requiredButton]; /* this will be the button which you actually need */] animated:NO];

Upvotes: 223

vinny
vinny

Reputation: 370

As of iOS 11 wont accept negative space width, in order to align the bar button items to the margin, I have used the below code.

 override func viewWillLayoutSubviews() {
                super.viewWillLayoutSubviews()
                for view in (self.navigationController?.navigationBar.subviews)! {
                    view.layoutMargins = UIEdgeInsets.zero
                }
            }

Upvotes: 5

rp2701
rp2701

Reputation: 31

Swift 3.1

To give left bar button item negative space:

    let backButton = UIButton.init(type: .custom)
    backButton.frame = CGRect.init(x: 0, y: 0, width: 40, height: 40)
    // negative space
    backButton.contentEdgeInsets = UIEdgeInsets(top: 0, left: -44.0, bottom: 0, right: 0)
    backButton.setImage(Ionicons.iosArrowBack.image(30, color: UIColor(hex: 0xFD6250)), for: .normal)
    backButton.addTarget(self, action: #selector(InviteVC.goBack), for: .touchUpInside)   
    // set back button
    self.navigationItem.leftBarButtonIteUIBarButtonItem.init(customView: backButton)

Upvotes: 2

Dvole
Dvole

Reputation: 5795

Swift 3:

let negativeSpacer:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.fixedSpace, target: nil, action: nil)
        negativeSpacer.width = -10
self.navigationItem.leftBarButtonItems = [negativeSpacer, yourBarButtonItem]

Upvotes: 4

Simon
Simon

Reputation: 2125

For Swift 2.0, this was my solution to get the following effect...

(the actual values may be different, depending on your situation)

enter image description here

let captureButton = UIButton()
captureButton.setTitle("CAPTURE DETAILS", forState: .Normal)
captureButton.frame = CGRectMake(0, 0, 200, 95)
captureButton.addTarget(self, action: Selector("showCaptureDetailsForm:"), forControlEvents: .TouchUpInside) // *** See update below for Swift 2.2 syntax
captureButton.setBackgroundImage(UIImage(named: "blueTopRight"), forState: .Normal)
        
let rightBarButton = UIBarButtonItem()
rightBarButton.customView = captureButton        
        
let negativeSpacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
negativeSpacer.width = -25;
        
self.navigationItem.setRightBarButtonItems([negativeSpacer, rightBarButton ], animated: false)

Swift 2.2 UPDATE:

For Swift 2.2, the action: Selector method has changed, and should be typed as follows

captureButton.addTarget(self, action: #selector(YourViewController.showCaptureDetailsForm(_:)), forControlEvents: .TouchUpInside)

Upvotes: 10

reza pahlevi
reza pahlevi

Reputation: 51

for swift you can do this

var negativeSpace:UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
negativeSpace.width = -17.0
self.navigationItem.rightBarButtonItems = [negativeSpace, requiredButton /* this will be the button which you actually need */]

Upvotes: 5

jaredsinclair
jaredsinclair

Reputation: 12687

In order to fix this bug, you must subclass UIButton so that you can override alignmentRectInsets. From my testing, you'll need to return a UIEdgeInsets with either a positive right offset or a positive left offset, depending on the button position. These numbers make no sense to me (at least one of them should be negative, according to common sense), but this is what actually works:

- (UIEdgeInsets)alignmentRectInsets {
    UIEdgeInsets insets;
    if (IF_ITS_A_LEFT_BUTTON) {
        insets = UIEdgeInsetsMake(0, 9.0f, 0, 0);
    } 
    else { // IF_ITS_A_RIGHT_BUTTON
        insets = UIEdgeInsetsMake(0, 0, 0, 9.0f);
    }
    return insets;
}

Special thanks to @zev for suggesting I try adjusting alignmentRectInsets.

Upvotes: 6

Igor Leonovich
Igor Leonovich

Reputation: 517

Nice decision, thanks a lot! I needed to add just two elements to the left side of navigation header. This is my solution:

  // Settings Button
  // This trick correct spacing between two left buttons
  UIBarButtonItem *settingsButtonItem = [[UIBarButtonItem alloc] init];
  UIView *settingsButtonItemView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 22.0, 22.0)];
  settingsButtonItem.customView = settingsButtonItemView;
  UIButton *settingsButton = [UIButton buttonWithType:UIButtonTypeSystem];
  settingsButton.frame = settingsButtonItemView.frame;
  [settingsButton setImage:[UIImage imageNamed:@"settings"] forState:UIControlStateNormal];
  settingsButton.tintColor = [[[[UIApplication sharedApplication] delegate] window] tintColor];
  [settingsButton addTarget:self action:@selector(showSettings:) forControlEvents:UIControlEventTouchDown];
  [settingsButtonItemView addSubview:settingsButton];

  // Star Button
  UIBarButtonItem *starButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"star_gray"] style:UIBarButtonItemStyleBordered target:self action:@selector(showStarred)];
  starButtonItem.width = 22.0;
  NSLog(@"%f", starButtonItem.width);

  // Negative Spacer
  // It shifts star button to the left
  UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
  negativeSpacer.width = -10.0;

  NSArray *leftNavigtaionBarButtonItems = @[negativeSpacer, starButtonItem, settingsButtonItem];
  [self.navigationItem setLeftBarButtonItems:leftNavigtaionBarButtonItems];

Upvotes: -1

Chris Wagner
Chris Wagner

Reputation: 20993

Following smek's lead I made a category but modified it to provide backwards compatibility rather than forwards. I setup everything to work how I want it in iOS 7 and then if the user is running something lower I start mucking with things. 

@interface UINavigationItem (BarButtonItemSpacingSupport)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem;
- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem;

@end

@implementation UINavigationItem (BarButtonItemSpacingSupport)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem
{
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        // Add a spacer on when running lower than iOS 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                                                                        target:nil action:nil];
        negativeSpacer.width = 10;
        [self setLeftBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, leftBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setLeftBarButtonItem:leftBarButtonItem];
    }
}

- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem
{
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        // Add a spacer on when running lower than iOS 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                           initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                           target:nil action:nil];
        negativeSpacer.width = 10;
        [self setRightBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, rightBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setRightBarButtonItem:rightBarButtonItem];
    }
}

@end

And then to get this globally, I have a thin UIViewController subclass that all of my view controllers inherit from.

@interface INFViewController : UIViewController

@end

@implementation INFViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    if (SYSTEM_VERSION_LESS_THAN(@"7.0")) {
        [self setupNavBarForPreIOS7Support];
    }
}

- (void)setupNavBarForPreIOS7Support {
    if (self.navigationController) {
        UINavigationItem *navigationItem = self.navigationItem;
        UIBarButtonItem *leftItem = navigationItem.leftBarButtonItem;
        UIBarButtonItem *rightItem = navigationItem.rightBarButtonItem;

        if (leftItem) {
            [navigationItem addLeftBarButtonItem:leftItem];
        }

        if (rightItem) {
            [navigationItem addRightBarButtonItem:rightItem];
        }
    }
}

@end

I realize that I am checking the OS version twice (once in INFViewController and again in the category), I left it in the category incase I want to use this as a one-off anywhere in the project.

Upvotes: 5

smek
smek

Reputation: 1669

Based on @C_X his answer I've created a category which adds and positions the UIBarButtonItem based on the iOS version of the current device.

// UINavigationItem+Additions.h
@interface UINavigationItem (Additions)
- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem;
- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem;
@end

// UINavigationItem+Additions.m
@implementation UINavigationItem (Additions)

- (void)addLeftBarButtonItem:(UIBarButtonItem *)leftBarButtonItem
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
        // Add a negative spacer on iOS >= 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                              target:nil action:nil];
        negativeSpacer.width = -10;
        [self setLeftBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, leftBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setLeftBarButtonItem:leftBarButtonItem];
    }
}

- (void)addRightBarButtonItem:(UIBarButtonItem *)rightBarButtonItem
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
        // Add a negative spacer on iOS >= 7.0
        UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                       initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
                                       target:nil action:nil];
        negativeSpacer.width = -10;
        [self setRightBarButtonItems:[NSArray arrayWithObjects:negativeSpacer, rightBarButtonItem, nil]];
    } else {
        // Just set the UIBarButtonItem as you would normally
        [self setRightBarButtonItem:rightBarButtonItem];
    }
}

@end

In your view controller you can now use [self.navigationItem addLeftBarButtonItem:leftBarButtonItem]; and [self.navigationItem addRightBarButtonItem:rightBarButtonItem];

I've also tried subclassing UIButton and override -alignmentRectInsets but this gave me problems with transitions between views.

Upvotes: 23

Zev Eisenberg
Zev Eisenberg

Reputation: 8148

I believe you need to use a custom button with a UIButton subclass, and in your subclass, override -alignmentRectInsets. I forget whether you need a positive or negative value for the appropriate edge to get it to shift correctly, but if one doesn’t work, try the other.

Upvotes: 0

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