CODEWITHSUNDEEP
iphoneobjective-ccocoainterface-builder
Organiccat
Organiccat

Reputation: 5651

Get text of button from IBAction - iPhone

When an IBAction is called:

-(IBAction) onClick1: (id) sender;

What is passed in the sender? Since it's hooked up through the IB, I'm not really sure. My question is how to get the text of the button to be the passed object (NSString most likely) so that I could call it inside the action implementation.

-(IBAction) onClick1: (id) sender {
  NSLog(@"User clicked %@", sender);
  // Do something here with the variable 'sender'
}

Upvotes: 30

Views: 88001

Answers (7)

Hardik Thakkar
Hardik Thakkar

Reputation: 15981

To fetch the text from the button:

 NSLog(@"Date::%@",[btn titleForState:UIControlStateNormal]);

Upvotes: 1

GameLoading
GameLoading

Reputation: 6708

-(IBAction)onClick:(id) sender {
     UIButton *btn = (UIButton *)sender;

    //now btn is the same object. And to get title directly
    NSLog(@"Clicked button: %@",[[btn titleLabel] text]);
}

Upvotes: 14

VSN
VSN

Reputation: 2361

Simply write the following code

-(IBAction) getButtonTitle:(id)sender
{
     UIButton *button = (UIButton *)sender; 
     NSString *buttonTitle = button.currentTitle;
     NSLog(@"Button Title %@",buttonTitle);

}

Thats it... you have done!!!

Upvotes: 10

Suresh
Suresh

Reputation: 21

You can just use the following to get the button label and determine which one was clicked:

NSLog(@"Clicked button: %@",[[sender titleLabel] text]);

To answer your question, the id is the object from the IB.

Upvotes: 2

Matt Ball
Matt Ball

Reputation: 6628

The sender should be the control which initiated the action. However, you should not assume its type and should instead leave it defined as an id. Instead, check for the object's class in the actual method as follows:

- (IBAction)onClick1:(id)sender {
    // Make sure it's a UIButton
    if (![sender isKindOfClass:[UIButton class]])
        return;

    NSString *title = [(UIButton *)sender currentTitle];
}

Upvotes: 60

Marc Charbonneau
Marc Charbonneau

Reputation: 40515

Sender should be defined as type id, not int or NSString. The sender is the actual object that's calling the method; if you hooked it up to a button, it will be a UIButton, if it's a text field, a UITextField. You can use this to get information from the control (for example the text field's current string value), or compare it to an IBOutlet instance variable if you have multiple controls hooked up to the same action method.

Upvotes: 2

Marc W
Marc W

Reputation: 19251

It's actually:

-(IBAction) onClick1: (id) sender {
  NSLog(@"User clicked %@", sender);
  // Do something here with the variable 'sender'
}

sender is not a NSString, it's of type id. It's just the control that sent the event. So if your method is trigged on a button click, the UIButton object that was clicked will be sent. You can access all of the standard UIButton methods and properties programmatically.

Upvotes: 25

Related Questions