How to pass a string as a tag of UIButton

Question

The tag value is an Integer:

UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:addressField forState:UIControlStateNormal];
[bu         


        

Answer 1

NSLog(@"The part number is:%@",[NSString stringWithFormat:@"%d",(UIControl*)sender).tag]);

Answer 2

You can convert the integer value of a tag to a NSString with:

[NSString stringWithFormat:@"%i", ((UIControl*)sender).tag];

Or, if you really need a string as identifier for an UI object, just subclass it and add a property like:

@property (nonatomic, strong) NSString *stringID;

And then use it instead of use the tag property.

Answer 3

There is a simple way for passing a NSString parameter with uibutton i.e. just set title of buuton with clear color and font size 0.0f.This is valid if your using a image([button setBackgroundImage:anyImage. forState:UIControlStateNormal];) on button and not showing the titl and then you can get "sender.currentTitle" and use this variable

Answer 4

try

-(void)pickTheQuiz:(id)sender{           
 NSNumber *tag = [NSNumber numberWithInt:sender.tag];
  NSLog(@"The part number is:%@",[tag stringValue]);
}

Answer 5

Probably not best practice, but one simple way to pass a string with UIButton is to store it in the accessibilityIdentifier property.

yourButton.accessibilityIdentifier = "Some string you want to pass"

...

@objc func tappedButton(sender: UIButton) {
  print("passed string is: \(sender.accessibilityIdentifier)")
}

Answer 6

The tag property will only accept integers, and if hacking the integer value to get to a string is not an option for you, you can sub-class the UIButton, and then use the User Defined Runtime Attributes section in IB to set the value of the property in your StoryBoard.

Subclass the UIButton with a new non-integer property:

@interface MyCustomUIButton : UIButton

@property (strong) NSString* stringTag;

@end

Set your button's class to the sub-class:

Identity inspector > Custom Class > Class => MyCustomUIButton

Set the property value from IB OR through code:

From IB:

Identity inspector > User Defined Runtime Attributes:

Key Path => stringTag

Type => String

Value => yourstringvalue

OR From Code:

((MyCustomUIButton*)yourButton).stringTag = @"yourstringvalue";

Then you can retrieve the value of the property from your button action method:

-(void)yourMethod:(id)sender
    {           
     NSLog(@"The string value is: ",((MyCustomUIButton*)sender).stringTag);

    // or use this idiom, to avoid a possible crash if it's the wrong class:

    if ( [sender respondsToSelector:@selector(stringTag)] )
          testeee = [sender valueForKey:@"stringTag"];
    else
          NSLog(@"this IS NOT a MyCustomUIButton, it's a plain UIButton");

    // testeee will be NULL if you FORGOT to set the
    // User Defined Runtime Attribute for 'stringTag' in storyboard

    // note that a useful alternative to
    // if ( [sender respondsToSelector:@selector(stringTag)] )
    // is... 
    // if ( [sender respondsToSelector:NSSelectorFromString(@"stringTag")] )
    }