Adding custom back button on navigation bar - ios

Question

I am trying to add custom back button on navigation bar but it is not working below is my code
-(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, buttonImage.size.height);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.backBarButtonItem = aBarButtonItem;
}
Please tell what's wrong with this code

Answer 1

Try this.
-(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, buttonImage.size.height);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:nil forControlEvents:UIControlEventTouchUpInside];
[self.navigationItem setLeftBarButtonItem:aBarButtonItem];
}

Answer 2

Here is the code that i have used to create custom backbutton
- (void)viewDidLoad
{
[super viewDidLoad];
// Set the custom back button
//add the resizable image
UIImage *buttonImage = [[UIImage imageNamed:#"backbtn.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 5)];
//create the button and assign the image
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setBackgroundImage:buttonImage forState:UIControlStateNormal];
MSLabel *lbl = [[MSLabel alloc] initWithFrame:CGRectMake(12, 4, 65, 28)];
lbl.text = #"Settings";
lbl.backgroundColor = [UIColor clearColor];
//lbl.font = [UIFont fontWithName:#"Helvetica" size:12.0];
lbl.numberOfLines = 0;
lbl.lineHeight = 12;
lbl.verticalAlignment = MSLabelVerticalAlignmentMiddle;
lbl.font = [UIFont fontWithName:#"Helvetica" size:12];
[button addSubview:lbl];
//set the frame of the button to the size of the image (see note below)
button.frame = CGRectMake(0, 0, 70, buttonImage.size.height);
[button addTarget:self action:#selector(back) forControlEvents:UIControlEventTouchUpInside];
//create a UIBarButtonItem with the button as a custom view
UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = customBarItem;
}
-(void)back {
// Tell the controller to go back
[self.navigationController popViewControllerAnimated:YES];
}
This code will resize your image so it can fit the text.
You can also put this button in any method.

Answer 3

You didn't add action to your button. So you need to add action to your button. For more info see in the below code..
-(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, buttonImage.size.height);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:#selector(backBtnPressed) forControlEvents:UIControlEventTouchUpInside]; // -------- Edit here -----
self.navigationItem.backBarButtonItem = aBarButtonItem;
}
-(void)backBtnPressed
{
[self.navigationController popViewControllerAnimated:YES];
}