I have an issue with my navigation bar, the UIBarButtonItem is not correctly vertically aligned. I don't know why because I'm using a simple UIBarButtonItem and not a custom view. See my code below and thanks for your help!
UIBarButtonItem *newGameItem = [[UIBarButtonItem alloc] initWithTitle:#"New Game" style:UIBarButtonItemStyleDone target:self action:#selector(newGame)];
self.navigationItem.rightBarButtonItem = newGameItem;
Actually there are couple ways to align the bar buttons.
Try to adjust the button title position with this:
[self.navigationItem.rightBarButtonItem setTitlePositionAdjustment:UIOffsetMake(-10, -10)
forBarMetrics:UIBarMetricsDefault];
-10 -10 - just for example
OR
you can initialize your newGameItem with custom UIButton. The custom button is a subclass of UIButton with this method overridden
- (UIEdgeInsets)alignmentRectInsets {
return UIEdgeInsetsMake(0, -10, 0, 15.0f); // here you can play with values to align your button properly
}
then initialize your newGameItem
CustomBarButton *button = [CustomBarButton buttonWithType:UIButtonTypeCustom];
[button setTitle:#"New game" forState:UIControlStateNormal];
button.frame = CGRectMake (0, 0, 60, 40);
[button addTarget:self action:#selector(newGame) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *newGameItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.rightBarButtonItem = newGameItem;
I had a similar issue: We use custom fonts via UIAppearance for both navigation titles and bar button items, and in some cases, the right item was vertically misaligned.
I could easily fix the misalignment by using [self.navigationItem setRightBarButtonItem:rightItem animated:YES] instead of the property setter.
I had the same problem with a button on the left, I was able to fix it in Xcode 6.3.1: select the button (bar button item) right column tab "ruler" inset image Top value: -54 instead of 0.
Note that: my device is an iPhone4 with iOS 7, the button was perfectly in place in Xcode and misplaced on the device, now it is in place on the device and misplaced in Xcode
Unfortunately, there is not much you can do about UIBarButtonItem vertical spacing. I believe you'll have to either increase the font size of your title on the UINavigationBar (you can do this with UIAppearance also), or decrease the font size of your UIBarButtonItem.
Related
I have created a ViewController Using Xib file of size wAny and hAny and i have used autolayaout and constraint to fit UI all devices and all orientation.
Everything is working fine but when i'm running app on iPhone portrait mode title of navigation bar is not centred where as when rotating it to landscape mode title is centred.
I have used following code for setting title
self.title = #"Download Schedule";
Already tried:
I have tried to set custom UILabel of lesser font size to Navigation bar's title view but still i'm getting it on left side .
Here is code of my right button
//add right bar button for more options
UIView *navBarButtonsView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
UIBarButtonItem *item0 = [UIBarButtonItem negativeSpacerWithWidth:5];
UIButton *moreButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
[moreButton setBackgroundImage:[UIImage imageNamed:#"ic_web"] forState:UIControlStateNormal];
[moreButton addTarget:self action:#selector(addNewSchedule) forControlEvents:UIControlEventTouchDown];
[navBarButtonsView addSubview:moreButton];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:navBarButtonsView];
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:item0, backButton, nil];
There is something else going on - something you have not told us about. I suspect that there is something wrong with how you are setting your rightButtonItems, such that there are invisible buttons taking up the space on the right. I can reproduce this issue only by deliberately making the right button really wide:
So I suspect you have applied a large width to the right button, or there are extra invisible right button items taking up the space on the right.
I'm using two images in my navigaton controller. One for the rightBarButtonItem and one for the titleView. I created both in code. So my problem is that the title view is not in the center, it's a little bit closer to the left side. It's because the right bar button, it's sure, I tested it and found some related questions, but still couldn't solve the problem.
I tried [[UIBarButtonItem appearance] setTitlePositionAdjustment:UIOffsetMake(0.0f, 0.0f) forBarMetrics:UIBarMetricsDefault]; but doesn't helped me out. I would really appreciate any suggestions.
- (void)setupLogo {
[self setNeedsStatusBarAppearanceUpdate];
CGRect myImage = CGRectMake(0, 0, 41, 41);
UIImageView *myLogo = [[UIImageView alloc] initWithFrame:myImage];
[myLogo setImage:[UIImage imageNamed:#"logo.png"]];
myLogo.contentMode = UIViewContentModeScaleAspectFit;
self.navigationItem.titleView = myLogo;
[[UIBarButtonItem appearance] setTitlePositionAdjustment:UIOffsetMake(0.0f, 0.0f) forBarMetrics:UIBarMetricsDefault];
}
The titleView is centered between the left and right items. It's not centered on the nav bar.
One possible solution would be to add a dummy left bar button item of the same size as your right bar button item. This will force the titleView to the center.
I added code to the viewDidLoad method of ViewController. I have two UIBarButtonItem, one of them is on the left called Left and the other one is at the right called Right. I can get the left button to work but I cannot even see the right button. What am I doing wrong?
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, 420, 44)];
[navbar setBackgroundImage:[UIImage imageNamed:#"bg_fade.png"] forBarMetrics:UIBarMetricsDefault];
UINavigationItem *item = [[UINavigationItem alloc]initWithTitle:#"Tray Tracker"];
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc]initWithTitle:#"Left" style:UIBarButtonItemStylePlain target:self action:
#selector(leftAction:)];
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc]initWithTitle:#"Right" style:UIBarButtonItemStylePlain target:self action:
#selector(saveAction:)];
item.leftBarButtonItem = leftButton;
item.rightBarButtonItem = rightButton;
navbar.items = #[item];
[self.view addSubview:navbar];
I do have the IBActions for leftAction and saveAction
If you simply want a bar with two buttons, you should use a UIToolbar instead. It's much easier to handle for this simple case. The only change you would need is to create a UIBarButtonItem flexibleSpace (it's a system item), and call [toolbar setItems:#[leftButton, flexibleSpace, rightButton]];
If you need actual navigation functionality such as a back button, take a look at this answer. You need to use UINavigationBar pushNavigationItem.
using UINavigationBar without UINavigationController
In your example, you are misusing the items property. The documentation for UINavigationBar states,
The bottom item is at index 0, the back item is at index n-2,
and the top item is at index n-1, where n is the number of items in the array.
In order to do accomplish what you're trying to do with a UINavigationBar, I think you need multiple navigationItems.
It would be MUCH easier to either use a UIToolbar or use the UINavigationBar in conjunction with a UINavigationController.
Edit
Now that you posted the image, I think the reason you can't see the right bar button is because your frame width is too large. The iphone screen is 320 px wide, so your frame for the navigationBar should be CGRectMake(0, 0, 320, 44)
I want to remove back button title from my navigation bar and put a custom back button to make it appear as in ios7 (just a left arrow). I could change change the text, but when i change the text to nil, the previous page title appears again. Also changing the background image is not working too, though i could change the image
try this code to hide back button:
self.navigationItem.hidesBackButton=YES;
self.navigationItem.leftBarButtonItem=nil;
create custom back button like this:
CGRect frameimgback1 = CGRectMake(0, 0, 60, 35);
UIButton *back = [[UIButton alloc] initWithFrame:frameimgback1];
[back setImage:[UIImage imageNamed:#"back.png"] forState:UIControlStateNormal];
[back addTarget:self action:#selector(back)
forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *btnL = [[UIBarButtonItem alloc]initWithCustomView:back];
self.navigationItem.leftBarButtonItem = btnL;
I think this is going to be a stupid question, but I can't seem to find the answer. I have a few simple lines of code to put a button in the navigation bar:
UIBarButtonItem *cancelButton=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:#"button-cancel.png"] style:UIBarButtonItemStylePlain target:self action:#selector(cancelPressed:)];
UINavigationItem *item = [[UINavigationItem alloc] init];
item.leftBarButtonItem = cancelButton;
item.hidesBackButton = YES;
[self.navigationBar pushNavigationItem:item animated:NO];
This button works fine, but it looks like this:
Any thoughts?
You probably want to create the bar button item using a custom view, where the custom view is a UIButton:
UIImage *cancelImage = [UIImage imageNamed:#"button-cancel"];
UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
cancelButton.frame = (CGRect){CGPointZero, cancelImage.size);
[cancelButton setImage:cancelImage forState:UIControlStateNormal];
UIBarButtonItem *cancelBarButton = [[UIBarButtonItem alloc] initWithCustomView:cancelButton];
Set your button (cancelButton) size according to the size of the button-cancel.png.
stopButton.frame = CGRectMake ();
Instead, create a custom type UIButton with your image. Set the target and selector of the UIbutton to what you wish the bar button item to do. Then initialize the bar button item as follows:
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
Where button is your UIButton using the desired image.
UIBarButtonItem/initWithImage: is typically used for making iconic buttons - not buttons that have text in them.
If you just want to change how the common textual UIBarButtonItem looks, you just need to set the background image of your bar button item. This way you don't have to have images for each button that contain your button text.
Docs: - (void)setBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics
You can also set this app-wide by calling setBackgroundImage: on the UIBarButtonItem appearance proxy.
Lastly, note that you'll likely need to create a resizeable image to pass to setBackgroundImage. This will let your single image accomodate any button size. See UIImage/resizeableImageWithCapInsets:resizingMode: (iOS6) or UIImage/stretchableImageWithLeftCapWidth:topCapHeight: (pre iOS6)
You can certainly do what #Wain suggests but there are drawbacks. For one, your press-handler will no longer be sending a UIBarButtonItem as the 'sender'. That may not seem like much until you have a common handler that suddenly needs to determine if the sender is a UIBarButtonItem or a UIButton, or if you want to present a UIPopoverController against this BarButtonItem (but you only have the UIButton reference...)