Hey, I want to display an activity indicator on the right corner of my navbar when my user changes selection in picker wheel. I have no idea how to add activity indicator there I am only able to add normal navbar buttons there. Any help? Thanks in advance!
UIActivityIndicatorView *activityIndicator =
[[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
UIBarButtonItem *barButton = [[UIBarButtonItem alloc]
initWithCustomView:activityIndicator];
[[self navigationItem] setRightBarButtonItem:barButton];
[barButton release];
[activityIndicator startAnimating];
This should work.
From: http://iosdevelopertips.com/user-interface/adding-an-activity-indicator-spinner-to-navigation-bar.html
Related
I'm writing an app in objective C for ios 8, and my navigation bar has an annoying margin thats causing it to be shifted to the right ~20 pixels for leftBarButtonItem and ~20 left for rightBarButtonItem, as shown in the image below. I have tried using negative spacers per some other posts to no avail. Any ideas?
(I'm trying to do this without using storyboards or xibs.)
Here is the code:
UIToolbar* toolbar_temp = [[UIToolbar alloc] init];
toolbar_temp.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 45);
toolbar_temp.barTintColor= [UIColor blackColor];
NSMutableArray *items = [[NSMutableArray alloc] init];
UIBarButtonItem *spaceItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIImage *camimage = [UIImage imageNamed:#"cancel"];
UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithImage:camimage style:UIBarButtonItemStylePlain target:self action:nil];
[items addObject:spaceItem ];
[items addObject:customItem ];
[items addObject:spaceItem ];
[toolbar_temp setItems:items animated:NO];
UIBarButtonItem *allButton = [[UIBarButtonItem alloc] initWithCustomView:toolbar_temp];
self.navigationItem.leftBarButtonItem = allButton;
EDIT:
I'm not sure if this gives any hints, but for some reason this works:
[[UINavigationBar appearance] setBarStyle:UIBarStyleBlackTranslucent];
While this does not:
[self.navigationController.navigationBar setBarStyle:UIBarStyleBlackTranslucent];
SOLUTION:
I ended up finding the solution myself. The issue was that I have a tabbar controller which had a navigation controller as one of the views. The navigation controller can only be setup in viewDidload, which doesn't get called in tabbar controllers. The solution was to add viewDidAppear and add the navigation controller within that function.
- (void)viewDidAppear:(BOOL)animated{[self addToolbar];}
Thanks all for the help!
It seems you cannot alter the minimum margins. You can do is add the toolbar_temp to the navigation bar:
[self.navigationController.navigationBar addSubview:toolbar_temp];
Or add to the self.view:
self.navigationController.navigationBarHidden = YES;
[self.view addSubview:toolbar_temp];
I want to change leftBarButton title. I've tried this
UIBarButtonItem *newBackButton =
[[UIBarButtonItem alloc] initWithTitle:#"Back"
style:UIBarButtonItemStyleBordered
target:nil
action:nil];
[[self navigationItem] setLeftBarButtonItem:newBackButton];
but it brings changes like
But I want it like
How it can be possible?
It may helpful for you
UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleDone target:self action:#selector(backAction:)];
self.navigationItem.leftBarButtonItem = backBarButton;
From the view controller (ViewController1) that is pushing the next view controller (ViewController2), you need to set the backBarButtonItem.
#implementation ViewController1
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"New Title" style:UIBarButtonItemStylePlain target:nil action:nil];
}
It's totally normal that you don't see any arrow in your back button. That's because you're creating a new bar button that you set its title and its style. But the style you've set for your bar button item won't give you what you wanted.
I suppose that you're using UINavigationController to navigate. If it's the case, you need to get a reference to navigationBar that UINavigationController displays on the screen. Then, you'll be able to change its color via tint color property. So,
[self.navigationController.navigationBar setTintColor:[UIColor redColor]];
would do what you want to achieve. Here is the image i obtained using the code i mentioned above.
If you're not using UINavigationController, the simplest solution is to provide an image for your back button which has already an arrow.
You should set backBarButtonItem instead of leftBarButtonItem. And remember to set it not in current view controller (where you wish it to be displayed) but in parent one (to which this button will return you).
Use this Code and
UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *backBtnImage = [UIImage imageNamed:#"BackBtn.png"] ;
[backBtn setBackgroundImage:backBtnImage forState:UIControlStateNormal];
[backBtn addTarget:self action:#selector(goback) forControlEvents:UIControlEventTouchUpInside];
backBtn.frame = CGRectMake(0, 0, 54, 30);
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:backBtn] ;
self.navigationItem.leftBarButtonItem = backButton;
and for going to back use this method .
-(void)goback
{
[self.navigationController popViewControllerAnimated:YES];
}
This worked for me
UIImage *image = [[UIImage imageNamed:#"btn_back.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStylePlain target:self action:#selector(backAction:)];
self.navigationItem.leftBarButtonItem = button;
- (IBAction)backAction:(id)sender
{
MainMenuViewController *mainMenuViewController = [[MainMenuViewController alloc] init];
[self.navigationController pushViewController:mainMenuViewController animated:YES];
}
I have a UIPickerView which has a UIToolbar placed as a subview. The problem is when I click on the UIbarviewItem nothing happens. I am not sure why, but if I insert the UIToolbar as a subview to the main view ([self.view addSubview:toolbar]) the button works fine, but not as a subview for the uIPickerView?
Here is my code I used to create the uipickerview and the uitoolabr:
dateRangePickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, CGRectGetHeight(self.view.frame)-200, CGRectGetWidth(self.view.frame), 220)];
dateRangePickerView.showsSelectionIndicator = YES;
dateRangePickerView.hidden = NO;
[dateRangePickerView reloadAllComponents];
dateRangePickerView.showsSelectionIndicator = YES;
dateRangePickerView.delegate = self;
dateRangePickerView.dataSource = self;
[dateRangePickerView setBackgroundColor:[UIColor whiteColor]];
[self.view addSubview:dateRangePickerView];
// Add toolbar
toolBar= [[UIToolbar alloc] initWithFrame:CGRectMake(0, -44, CGRectGetWidth(self.view.frame), 44)];
[toolBar setBarStyle:UIBarStyleDefault];
UIBarButtonItem *barButtonDone = [[UIBarButtonItem alloc] initWithTitle:#"Done"
style:UIBarButtonItemStyleBordered target:self action:#selector(selectDateRange)];
toolBar.items = [[NSArray alloc] initWithObjects:barButtonDone,nil];
barButtonDone.tintColor=[UIColor blackColor];
[dateRangePickerView addSubview:toolBar];
Could anybody tell me where am I going wrong?
Thanks,
Peter
I decided instead of adding a subview to the UIPicker, I placed the UIPicker and UIToolbar in a UIView to keep everything together.
Thanks all for your help :)
Im trying to add UIsearchBar to my navigation controller. Also i wish to use cancel button of UISearchBar.
UISearchBar* searchBar = [[UISearchBar alloc] init];
searchBar.frame = CGRectMake(0, 0, 300, searchBar.frame.size.height);
searchBar.translucent = NO;
searchBar.barStyle = UIBarStyleBlack;
searchBar.delegate = self;
UIView* myView = [[UIView alloc] initWithFrame:searchBar.frame];
[myView addSubview:searchBar];
UIBarButtonItem* sbItem = [[UIBarButtonItem alloc] initWithCustomView:myView];
[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:chart,sbItem,nil]];
trouble that searchBar is inactive. it appears in navigation controller. But when i tap on it it does not response at any way. If i show cancel button it appears but also not clickable.
If i doesnt wrap UIsearchBar at UIView it work fine except it doesnt want to show me a cancel button.
UPD
IF i call
[searchBar becomeFirstResponder]
it goes to edit mode and shows me a cancel button and keyboard, but looks like view in which searchBar wrapped changes it frame params and goes on 10px down from its original appearence. And change its background from trnsparent to blackopaque
Looks like a some kind of Voodoo... So simple action takes so much time...
i think you have mistaken at search bar frame,you took search bar height as searchBar.frame.size.height,but there was no height at that time,just change it like:
UISearchBar* searchBar = [[UISearchBar alloc] init];
searchBar.frame = CGRectMake(0, 0, 300, 40);
searchBar.translucent = NO;
searchBar.barStyle = UIBarStyleBlack;
searchBar.delegate = self;
UIView* myView = [[UIView alloc] initWithFrame:searchBar.frame];
[myView addSubview:searchBar];
UIBarButtonItem* sbItem = [[UIBarButtonItem alloc] initWithCustomView:myView];
[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:chart,sbItem,nil]];
i am sorry,i don't know what the chart is here,hope it is what you are looking for.
I have created a custom UINavigationBar which is a tiny bit taller than Apples default navigation bar.
I can’t seem to find a way to move the UIBarButtonItem down to be directly centered between the two dashed lines.
Is there an easy way to do this? I’ve tried creating a custom button but had no success. Ideally I would just like to move the default back button down a couple of pixels.
Code used to create UINavigationBar, custom header image and UIBarButtonItem:
//Create image for navigation background
UIImage *NavigationPortraitBackground = [[UIImage imageNamed:#"navbackground.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
[[UINavigationBar appearance] setBackgroundImage: NavigationPortraitBackground
forBarMetrics:UIBarMetricsDefault];
//Centered title image
UIImageView *headerImage = [[UIImageView alloc] initWithImage: [UIImage imageNamed: #"hometitle.png"]];
[headerImage setFrame: CGRectMake(0, 0, 180, 49)];
self.navigationItem.titleView = headerImage;
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] init];
[backBarButtonItem setTintColor: [UIColor colorWithRed:0 green:69.0/255 blue:118.0/255 alpha:1]];
[backBarButtonItem setStyle: UIBarButtonItemStylePlain];
self.navigationItem.backBarButtonItem = backBarButtonItem;
[backBarButtonItem release];
Thanks in advance,
Create the UIBarButtonItem using a custom view. This custom view will be a UIView with the actual UIButton (as a subview) placed x pixels from the top (x=the number of pixels you want to move it down).
sorry
UIButton *myButton1 = [UIButton buttonWithType:UIButtonTypeCustom];
[myButton1 setImage:[UIImage imageNamed:#"back.png"] forState:UIControlStateNormal]; myButton1.showsTouchWhenHighlighted = YES;
myButton1.frame = CGRectMake(0.0, 3.0, 50,30);
[myButton1 addTarget:self action:#selector(back) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithCustomView:myButton1];
self.navigationItem.leftBarButtonItem = leftButton;