I am creating a taller navigation bar, height == 200, however, when i clicked below the back button, it also navigates back.
here is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
navBar = [[SRNavigationBar alloc] initWithFrame:CGRectMake(0, 0, screenWidth, 200.0)];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:NO];
[self.navigationItem setHidesBackButton:YES animated:YES];
__weak id weakSelf = self;
self.navigationController.interactivePopGestureRecognizer.delegate = weakSelf;
[self styleNavBar];
}
- (void)styleNavBar
{
UINavigationItem *newItem = [[UINavigationItem alloc]initWithTitle:[[PFUser currentUser] objectForKey:#"nickName"]];
UIBarButtonItem *menu = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:#"back"] style:UIBarButtonItemStyleDone target:self action:#selector(back)];
newItem.leftBarButtonItem = menu;
newItem.leftBarButtonItem.tintColor = [UIColor colorWithRed:245/255.0 green:124/255.0 blue:0/255.0 alpha:1];
[navBar setItems:#[newItem]];
[self.view addSubview:navBar];
}
- (void)back
{
[self.navigationController popViewControllerAnimated:YES];
}
Any help will be appreciated
you can use custom button giving height as per your need
-(void)addLeftButton
{
UIImage *buttonImage = [UIImage imageNamed:#"btn_back.png"];
UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
[aButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
aButton.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, 200.0);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
[self.navigationItem setLeftBarButtonItem:aBarButtonItem];
}
Apple Support:
I recommend that you avoid having touch-sensitive UI in such close
proximity to the nav bar or toolbar. These areas are typically known
as "slop factors" making it easier for users to perform touch events
on buttons without the difficulty of performing precision touches.
This is also the case for UIButtons for example.
But if you want to capture the touch event before the navigation bar
or toolbar receives it, you can subclass UIWindow and override:
-(void)sendEvent:(UIEvent *)event;
https://stackoverflow.com/a/9719364/2138564
When i testing my app through xcode in multiple devices, my app shows one toolbar as expected. After that i have uploaded the update of my app, in app store. But suddenly, I realized that in some iphones (ios 7.0.4), after app's update, on launching it cames with 2 toolbars.
I am adding the toolbar programmatically in viewDidLoad function of this controller.
UIImage* leftImg = [UIImage imageNamed:#"left.png"];
UIImage* rightImg = [UIImage imageNamed:#"right.png"];
CGRect frame = CGRectMake(0, 0, leftImg.size.width, leftImg.size.height);
UIButton* lefButton = [[UIButton alloc] initWithFrame:frame];
UIButton* rigButton = [[UIButton alloc] initWithFrame:frame];
[lefButton setTitle:#"" forState:UIControlStateNormal & UIControlStateHighlighted];
[rigButton setTitle:#"" forState:UIControlStateNormal & UIControlStateHighlighted];
[lefButton setImage:leftImg forState:UIControlStateNormal];
[lefButton setImage:leftImg forState:UIControlStateSelected];
[rigButton setImage:rightImg forState:UIControlStateNormal];
[rigButton setImage:rightImg forState:UIControlStateSelected];
[lefButton addTarget:self action:#selector(loadPrevChapter:) forControlEvents:UIControlEventTouchUpInside];
[rigButton addTarget:self action:#selector(loadNextChapter:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *itemLeft = [[UIBarButtonItem alloc] initWithCustomView:lefButton];
UIBarButtonItem *itemRight = [[UIBarButtonItem alloc] initWithCustomView:rigButton];
// In case i want to add Space between barbuttonitems
UIBarButtonItem *flexiableItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
// add items to toolbar
NSArray *items = [NSArray arrayWithObjects:itemLeft, flexiableItem, itemRight, nil];
self.toolbarItems = items;
[self.navigationController setToolbarHidden:NO animated:NO];
UIImage *toolbarBgImage = [UIImage imageNamed:tlbImg];
UIImage *navbarBgImage = ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0f) ? [UIImage imageNamed:navImgIos7] : [UIImage imageNamed:navImg];
[[UINavigationBar appearance] setBackgroundImage:navbarBgImage forBarMetrics:UIBarMetricsDefault];
[[UIToolbar appearance] setBackgroundImage:toolbarBgImage forToolbarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];
But i haven't added at navigation controller the toolbar this:
[[self navigationController].view addSubview:_toolbar];
as #Xeieshan said below.
Has anyone notice something like this before or does anyone know why this happening?
Screenshot of my app running on my iPhone 5 (v7.0.4)
Screenshot of my app, installed through appstore, after update, running on an iPhone 5 (v7.0.4)
[[self navigationController].view addSubview:toolbar]; This is how to add UIToolbar in UINavigationController but i cannot see your code where you do it?
I think you are adding UIToolbar on both UIViewController and UINavigationController.
I'd advise against adding the toolbar to UINavigationController.view, as it breaks encapsulation (even though that's not enforced very much in UIKit).
Instead, add a custom root view controller containing the toolbar and a contained UINavigationController. This also allows you to properly layout the toolbar so that it doesn't cover the views in the navigation controller.
I'm having an issue that so far I cannot find a solution to. I am adding a new feature to my app and wish to add a second UIBarButtonItem on the left side of my UINavigationBar. For some reason iOS 7 takes this as a button1, grandCanyon, button2. I cannot find any way to remove the ridiculous spacing between these two buttons, which is also causing my title to be out of alignment. Can anyone help!? Is there a solution to this!?
Code:
UIBarButtonItem *firstButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"firstButton"] style:UIBarButtonItemStylePlain target:self action:#selector(showSettings)];
UIBarButtonItem *secondButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"secondButton"] style:UIBarButtonItemStylePlain target:self action:#selector(showAttachments)];
[self.navigationItem setLeftBarButtonItems:[NSArray arrayWithObjects:firstButton, secondButton, nil]];
Think I've managed to sort out the problem using a custom view as shown below, it's not perfect (selection dims the buttons darker rather than lighter for example) but I'll try fixing that tomorrow. Just glad my headache is over! Thank you for your help, it lead me to a few new approaches I didn't try.
UIImage *firstButtonImage = [UIImage imageNamed:#"firstButton"];
firstButtonImage = [firstButtonImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIButton *firstButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 35, 35)];
[firstButton setImage:firstButtonImage forState:UIControlStateNormal];
[firstButton addTarget:self action:#selector(firstButtonPressed) forControlEvents:UIControlEventTouchUpInside];
UIImage *secondButtonImage = [UIImage imageNamed:#"secondButton"];
secondButtonImage = [secondButtonImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIButton *secondButton = [[UIButton alloc] initWithFrame:CGRectMake(45, 0, 35, 35)];
[secondButton setImage:secondButtonImage forState:UIControlStateNormal];
[secondButton addTarget:self action:#selector(secondButtonPressed) forControlEvents:UIControlEventTouchUpInside];
UIView *leftBarItemsView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 80, 35)];
[leftBarItemsView addSubview:firstButton];
[leftBarItemsView addSubview:secondButton];
UIBarButtonItem *leftBarItem = [[UIBarButtonItem alloc] initWithCustomView:leftBarItemsView];
[self.navigationItem setLeftBarButtonItems:[NSArray arrayWithObject:leftBarItem]];
There may be a better way, but to correct spacing issues on bar button items on iOS 7, I've subclassed UINavigationBar and overridden the layoutSubviews method. There you can move each bar button item wherever you want.
As an example:
- (void)layoutSubviews
{
[super layoutSubviews];
// If iOS 7, fix the bar button positions
BOOL isIOS7 = [[[UIDevice currentDevice] systemVersion] compare:#"7" options:NSNumericSearch] != NSOrderedAscending;
if (isIOS7)
{
for (UIBarButtonItem *item in self.topItem.leftBarButtonItems)
{
// Reposition the customView property
}
for (UIBarButtonItem *item in self.topItem.rightBarButtonItems)
{
// Reposition the customView property
}
}
}
Actually, as I looked at my code, I was using UIBarButtonItems with custom views. So I was able to move the custom view position.
You will likely need to loop through the subviews of the UINavigationBar to move them if you're just using UIBarButtonItems with images like this:
- (void)layoutSubviews
{
[super layoutSubviews];
// If iOS 7, fix the bar button positions
BOOL isIOS7 = [[[UIDevice currentDevice] systemVersion] compare:#"7" options:NSNumericSearch] != NSOrderedAscending;
if (isIOS7)
{
for (UIView *subview in self.subviews)
{
// Reposition as needed
}
}
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] autorelease];
UINavigationController *nav=[[UINavigationController alloc] initWithRootViewController:self.viewController];
// CHANGE COLOR TO BLACK
nav.navigationBar.tintColor = [UIColor blackColor];
// ADDING IMAGE TO NAVIGATION BAR
UIImage *image = [UIImage imageNamed:#"logo_36.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[nav.navigationBar.topItem setTitleView:imageView];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}
I have tried this code in appdelegate class because i want it throughout the whole project, it works for displaying image, but it shows in centre also i need text which i couldn't display.
Please could someone suggest how can i display both image and text on left side of navigation bar in iOS
Why you are setting imageview to navigation topItem titleview
Replace
[nav.navigationBar.topItem setTitleView:imageView];
with nav.navigationbar.topItem.leftBarButtonItem:imageview
and set `[nav.navigationBar.topItem setTitle:#"text you want"];
UIImage* image3 = [UIImage imageNamed:#"mail-48_24.png"];
CGRect frameimg = CGRectMake(0, 0, image3.size.width, image3.size.height);
UIButton *someButton = [[UIButton alloc] initWithFrame:frameimg];
[someButton setBackgroundImage:image3 forState:UIControlStateNormal];
[someButton addTarget:self action:#selector(sendmail)
forControlEvents:UIControlEventTouchUpInside];
[someButton setShowsTouchWhenHighlighted:YES];
UIBarButtonItem *mailbutton =[[UIBarButtonItem alloc] initWithCustomView:someButton];
self.navigationItem.leftBarButtonItem=mailbutton;
[someButton release];
I want to use custom back button. in iOS 6 everything is perfect but iOS 7 is strange.
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[[UIImage imageNamed:#"back_button_normal"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12.0, 0, 12.0)] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
first, it has no iOS 7 arrow and no background image.
(Russian locale)
then, if you press the button background image appears. Also i had background image set for UIControlStateHighlighted state and when you hold the button pressed highlighted image appears too. After any back button once pressed all back buttons have background image.
BUT! If you present modal view controller, dismiss it, then push any view controller - iOS 7 arrow will appear at every back button.
I use DP5. Is that a UIKit bug?
PS Also i tried to create back button manually, using UIBarButtonItem, set background image to it, then self.navigationItem.backBarButtonItem = barButtonItem; Did not help.
Then i tried to set background image to disabled state and change enabled property of my bar button item, did not help too.
This is not a bug, this how Back button looks in iOS 7. For example:
You should probably use the new concept for your application, and not to set background image for back button in iOS 7.
If you still want you back button have the same as it looked in iOS6 than you should probably create those back buttons manually:
- (void)loadView
{
[super loadView];
UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 60.0f, 30.0f)];
UIImage *backImage = [[UIImage imageNamed:#"back_button_normal.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12.0f, 0, 12.0f)];
[backButton setBackgroundImage:backImage forState:UIControlStateNormal];
[backButton setTitle:#"Back" forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(popBack) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
self.navigationItem.leftBarButtonItem = backButtonItem;
}
-(void) popBack {
[self.navigationController popViewControllerAnimated:YES];
}
Edit: Not to break Swipe Gesture (Here is a source)
self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;
The custom background image not appearing on the first push was fixed in iOS 7 GM.
To hide standard back indicator use this code:
if ([UINavigationBar instancesRespondToSelector:#selector(setBackIndicatorImage:)]) { // iOS 7
[navigationBarAppearance setBackIndicatorImage:[UIImage imageNamed:#"transparent_1px"]];
[navigationBarAppearance setBackIndicatorTransitionMaskImage:[UIImage imageNamed:#"transparent_1px"]];
}
The custom background image not appearing initially was not fixed in iOS7 GM or final, as far as I can tell. I see the same problem. It does seem to be an Apple bug; the private view Apple uses simply does not get a setNeedsDisplay call when it needs it on initial display. Doing anything to it which causes that call should fix it -- like pressing on it (which likely changes internal state so it calls setNeedsDisplay on itself), or bringing a modal up (which probably forces a redisplay of the entire view hierarchy on the next viewWillAppear: call).
Using leftBarItems instead also can work, but that may cause a lot of maintenance issues with existing code (some screens may have their own left items, expecting that when set back to nil they restore the original back item, for example).
As mentioned, ideally you would be able to change to a borderless look on iOS7, which means that the bug isn't really apparent (since there is no background image). For some iOS6/iOS7 transition situations though, that may be difficult (lots of screens, and/or the need to support older iOS versions for a while and too hard to have two looks implemented, and it doesn't look good borderless without other changes). If that's the case, the following patch should work:
#import <objc/runtime.h>
#implementation UINavigationBar (BackButtonDisplayFix)
+ (void)load
{
if ([UIDevice currentDevice].systemVersion.intValue >= 7)
{
/*
* We first try to simply add an override version of didAddSubview: to the class. If it
* fails, that means that the class already has its own override implementation of the method
* (which we are expecting in this case), so use a method-swap version instead.
*/
Method didAddMethod = class_getInstanceMethod(self, #selector(_displaybugfixsuper_didAddSubview:));
if (!class_addMethod(self, #selector(didAddSubview:),
method_getImplementation(didAddMethod),
method_getTypeEncoding(didAddMethod)))
{
Method existMethod = class_getInstanceMethod(self, #selector(didAddSubview:));
Method replacement = class_getInstanceMethod(self, #selector(_displaybugfix_didAddSubview:));
method_exchangeImplementations(existMethod, replacement);
}
}
}
- (void)_displaybugfixsuper_didAddSubview:(UIView *)subview
{
[super didAddSubview:subview];
[subview setNeedsDisplay];
}
- (void)_displaybugfix_didAddSubview:(UIView *)subview
{
[self _displaybugfix_didAddSubview:subview]; // calls the existing method
[subview setNeedsDisplay];
}
#end
Note: UINavigationBar does currently have an override of the method in question, so I'd expect the method_exchangeImplementations style to be used. I just added the other stuff for safety in case Apple changes their code. We may go borderless ourselves, but I did find this approach worked as an option (until a more thorough UI uplift), at least.
Additional note: This bug appears to be fixed in iOS 7.1. So, the patch could be conditionalized to only install the methods if running >= 7.0 and < 7.1.
There is a better solution that doesn't involve method swizzling.
You need to add UINavigationViewControllerDelegate method somewhere in your app.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
dispatch_async(dispatch_get_main_queue(), ^{
[[navigationController.navigationBar subviews] makeObjectsPerformSelector:#selector(setNeedsDisplay)];
});
}
My solution is for iOS 7 and above.
At first, make default back button invisible.
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"" style:UIBarButtonItemStylePlain target:nil action:nil];
then, set default backIndicatorImage of back button using custom image.
[UINavigationBar appearance].backIndicatorImage = [[UIImage imageNamed:#"topbar_icon_back_n.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[UINavigationBar appearance].backIndicatorTransitionMaskImage = [[UIImage imageNamed:#"topbar_icon_back_p.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
At this point, make custom UINavigationBar for resizing _UINavigationBarBackIndicatorView which contains above backIndicatorImage.
const CGPoint SANavigationBarOffset = {-8, 11.5};
#implementation SANavigationBar
- (void)layoutSubviews
{
[super layoutSubviews];
// set back button position
NSArray *classNamesToReposition = #[#"_UINavigationBarBackIndicatorView"];
for (UIView *view in [self subviews]) {
if ([classNamesToReposition containsObject:NSStringFromClass([view class])]) {
CGRect frame = [view frame];
frame.origin.x = 0;
frame.origin.y = 0;
[view setFrame:frame];
}
}
}
#end
then, set it as my navigationBar
// set custom NavagationBar for back button position
[self.navigationController setValue:[[SANavigationBar alloc] init] forKey:#"navigationBar"];
Add button as navigation item in ios7 as below
UIButton *btnAdd = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
[btnAdd setContentMode:UIViewContentModeScaleAspectFit];
[btnAdd setBackgroundImage:[UIImage imageNamed:#"back.png"] forState:UIControlStateNormal];
[btnAdd addTarget:self action:#selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *btnAdd = [[UIBarButtonItem alloc] initWithCustomView:imView];
self.navigationItem.rightBarButtonItem = btnAdd;
Using Swift you can just add a extension:
extension UIViewController: UIGestureRecognizerDelegate {
func popBack() {
self.navigationController?.popViewControllerAnimated(true)
}
func enableCustomBackButtom() {
self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: UIImage(named: "icon-back"), style: UIBarButtonItemStyle.Plain, target: self, action:"popBack")
self.navigationController?.interactivePopGestureRecognizer.delegate = self
}
}
And in your UIViewController use like this:
self.enableCustomBackButtom()
I just did it providing the same behaviour as in iOS6 (notice that navigationBar is the UINavigationBar), make sure that navigationBar has a topItem
UINavigationItem *topItemNavigation = [navigationBar topItem];
UIBarButtonItem *barButtonTopItemNavigation = [[UIBarButtonItem alloc] initWithTitle:topItemNavigation.title style:UIBarButtonItemStyleBordered target:nil action:nil];
[barButtonTopItemNavigation setBackButtonBackgroundImage:YOUR_IMAGE_BACKGROUND forState:UIControlStateNormal barMetrics:UIBarMetricsDefault ];
[topItemNavigation setBackBarButtonItem: barButtonTopItemNavigation];
}
My solution was to write a category on UINavigationItem. This is for iOS7.
- (void)mdSetCustomBackButton:(UINavigationController *)navigationController
{
MDBackButton *backButton = [[MDBackButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 44.0, 44.0) navigationController:navigationController];
[backButton addTarget:self action:#selector(popBack:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
[self setLeftBarButtonItem:barButtonItem];
[navigationController.interactivePopGestureRecognizer setDelegate:(id<UIGestureRecognizerDelegate>)self];
}
- (void)popBack:(MDBackButton *)sender
{
[sender.navigationController popViewControllerAnimated:YES];
}
And subclass UIButton to add a UINavigationController property (to pop and set swipe back delegate).
#property (nonatomic, weak) UINavigationController *navigationController;
#implementation MDBackButton
- (id)initWithFrame:(CGRect)frame navigationController:(UINavigationController *)navigationController
{
self = [super initWithFrame:frame];
if(self){
_navigationController = navigationController;
[self setImage:[UIImage imageNamed:#"back_button"] forState:UIControlStateNormal];
}
return self;
}
This is work for me:
- (void)setCustomNavigationBackButton
{
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"" style:UIBarButtonItemStylePlain target:nil action:nil];
UIImage *myIcon = [self imageWithImage:[UIImage imageNamed:#"backbutton.png"] scaledToSize:CGSizeMake(20, 20)];
self.navigationController.navigationBar.backIndicatorImage = myIcon;
self.navigationController.navigationBar.backIndicatorTransitionMaskImage = myIcon;
}
- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize
{
//UIGraphicsBeginImageContext(newSize);
// In next line, pass 0.0 to use the current device's pixel scaling factor (and thus account for Retina resolution).
// Pass 1.0 to force exact pixel size.
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Also, custom font with custom color:
//self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:
#{NSForegroundColorAttributeName:[UIColor whiteColor],
NSFontAttributeName:[UIFont fontWithName:#"Signika-Bold" size:20]}
forState:UIControlStateNormal];
Reference: https://stackoverflow.com/a/2658801/1371949
I use these codes below, which works in iOS 8
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.translatesAutoresizingMaskIntoConstraints = NO;
button.exclusiveTouch = YES;
button.titleLabel.font = [UIFont systemFontOfSize:14.0];
[button setTitleColor:kWhiteColor forState:UIControlStateNormal];
[button setTitleColor:[UIColor colorWithRed:1/255.0 green:36/255.0 blue:60/255.0 alpha:1.0] forState:UIControlStateHighlighted];
[button setTitle:#"Back" forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:#"barbutton_back"] forState:UIControlStateNormal];
[button setImageEdgeInsets:UIEdgeInsetsMake(1.0, 0.0, 0.0, 0.0)];
CGSize fontSize = [button.titleLabel sizeThatFits:CGSizeMake(100.0, 30.0)];
button.frame = CGRectMake(0.0, 0.0, button.imageView.image.size.width+fontSize.width, 30.0);
UIBarButtonItem *barbtn = [[UIBarButtonItem alloc] initWithCustomView:button];
//fix iOS 7 left margin
UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
negativeSpacer.width = -10;
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:negativeSpacer,barbtn, nil];
-(void) viewWillAppear:(BOOL)animated
{
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setFrame:CGRectMake(0, 0, 30, 44)];
[btn setImage:[UIImage imageNamed:#"btnBack.png"] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(PopToView) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *btnBack = [[UIBarButtonItem alloc] initWithCustomView:btn];
[btnBack setTintColor:[UIColor whiteColor]];
[[self.navigationController navigationItem] setLeftBarButtonItem:btnBack];
}