Programmatically add a back button to a UINavigationBar? - ios

Question

I am using the following code to achieve a navigation bar in my app. (my app was crashing when I used a push segue so I need a modal segue meaning the nav bar is hidden after the modal segue is called)
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
//do something like background color, title, etc you self
[self.view addSubview:navbar];
Does any one know any methods I can use with the above code to achieve back button functionality in the nav bar??

Answer 1

Use below code to add back button on left side of navigation bar.Add UIBarButtonItem on Navigation bar.
UIBarButtonItem *backButton = [[UIBarButtonItem alloc]
initWithTitle:#"Back"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(backBtnClicked:)];
self.navigationItem.leftBarButtonItem = backButton;

Answer 2

Use below code to add back button on left side
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
//do something like background color, title, etc you self
[self.view addSubview:navbar];
UINavigationItem *item = [[UINavigationItem alloc]
init];
navbar.items= #[item];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc]
initWithTitle:#"Back"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(backBtnClicked:)];
item.leftBarButtonItem = backButton;

Answer 3

BackButton is better than LeftButton I think:
UIBarButtonItem *backBtn = [[UIBarButtonItem alloc] init];
[desVC.navigationItem setBackBarButtonItem:backBtn];

Answer 4

Add Back Button With Image :
UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 70.0f, 21.0f)];
UIImage *backImage = [UIImage imageNamed:#"backBtn"];
[backButton setImage:backImage forState:UIControlStateNormal];
[backButton setTitleEdgeInsets:UIEdgeInsetsMake(10.0, 10.0, 10.0, 0.0)];
[backButton setTitle:#"Back" forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
[negativeSpacer setWidth:-15];
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:negativeSpacer,backButtonItem,nil];

Answer 5

Regarding the back button, the proper way is not to create your own.
The UINavigationItem class has proper support for this:
func setHidesBackButton(_:animated:)
var leftItemsSupplementBackButton: Bool
So, if you want to add a custom button on the left side, just set leftItemsSupplementBackButton to true.
Or call
self.navigationItem.setHidesBackButton(false, animated:false)