How to set target and action for UIBarButtonItem at runtime

Question

Tried this but only works for UIButton:

[btn setTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];

Answer 1

Just set the UIBarButtonItem's target and action properties directly.

Answer 2

UIBarButtonItem doesnt have the same addTarget method so you have to set them directly as follows

btn.target = self;
btn.action = @selector(barButtonCustomPressed:);

...

// can specify UIBarButtonItem instead of id for this case
-(IBAction)barButtonCustomPressed:(UIBarButtonItem*)btn 
{
    NSLog(@"button tapped %@", btn.title);
}

Answer 3

I ran into a similar problem... I assume you mean that if your UIButton is not part of your UITabBar to call btnClicked then it works appropriately. If this is the problem you are proposing then, check your btnClicked method and change it from:

-btnClicked:(id)sender

to

-(void) btnClicked:(id)sender

that, and declare btnClicked in the header file...

For what it's worth, this is how I setup a button in tabbarbuttonitem:

UIBarButtonItem *exampleButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"button.png"] style:UIBarButtonItemStylePlain target:self action:@selector(btnClicked:)];

Answer 4

Set target and action of your UIBarButtonItem

Swift 5 & 4

button.target = self
button.action = #selector(action)

@objc func action (sender:UIButton) {
    print("action")
}

Answer 5

If you need this enough times in your code, it's nice to go ahead and extend UIBarButtonItem which I've done below in Swift. :)

import UIKit

extension UIBarButtonItem {
    func addTargetForAction(target: AnyObject, action: Selector) {
        self.target = target
        self.action = action
    }
}

As an example, with self as a UIViewController, you'd simply call:

self.myBarButtonItem.addTargetForAction(self, action: #selector(buttonPressed(_:))

Answer 6

  UIBarButtonItem *barListBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAdd target:self action:@selector(getTruckStopListAction)];   
    self.navigationItem.rightBarButtonItem = barListBtn;
    [barListBtn release];

Answer 7

@wp42 It does work today.

A nifty way of doing this in objective-C is adding a category to UIBarButtonItem class:

.h file

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (addons)

-(void)addTarget:(id)target andAction:(SEL)action;

@end

.m file

#import "UIBarButtonItem+addons.h"

@implementation UIBarButtonItem (addons)

-(void)addTarget:(id)target andAction:(SEL)action{
   [self setTarget:target];
   [self setAction:action];
}

@end

In practice:

[myBtn addTarget:self andAction:@selector(myFunction:)];

Answer 8

If you are programmatically adding the UIBarButtonItem, the best way to set the target and action is to initialize the button with one of the following methods:

UIBarButtonItem *customButton = [[UIBarButtonItem alloc] initWithImage:<#(UIImage)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

UIBarButtonItem *customButton = [UIBarButtonItem alloc] initWithTitle:<#(NSString *)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

UIBarButtonItem *customButton = [UIBarButtonItem alloc] initWithImage:<#(UIImage *)#> landscapeImagePhone:<#(UIImage *)#> style:<#(UIBarButtonItemStyle)#> target:<#(id)#> action:<#(SEL)#>

Answer 9

You may want to try out the addTarget method.