how to pass data when button is clicked

Question

Lets say I have 10 buttons. For each button i want to pass some text... e.g. Button 1, My New Button 2, etc....

What I want to do is print this text in NSLog.

Hence I created one method and passed this to button. But I am not getting how can I pass data into it...

[myButton addTarget:self action:@selector(btnSelected:) forControlEvents:UIControlEventTouchUpInside];

-(IBAction)btnSelected:(id)sender {
    NSLog(@"btnSelected data is %@", sender);
    // I want to print some text for respective button here...    
}

But I am not getting... any idea how to get this done?

score 2 · Answer 1 · answered Jul 25 '13 at 12:49

You can associate data with objects as :

Firstly import this class : #import <objc/runtime.h>

Then create a key as

static char * kIndexPathAssociationKeySTR = "associated_string_key";

then associate string as : ** Here you can associate any type of data with button like : NSMutableArray or NSString etcetra**

NSString *myAttachedValue = @"This is the info I am associating with button";
objc_setAssociatedObject(self.testBtn,
                         kIndexPathAssociationKeySTR,
                         myAttachedValue,
                         OBJC_ASSOCIATION_RETAIN);

then access it in your method you called on button event as :

- (IBAction)btnTouched:(UIButton *)sender {
    NSString *valueIs = (NSString *)objc_getAssociatedObject(self.testBtn, kIndexPathAssociationKeySTR);
    NSLog(@"value is : %@",valueIs);

}

Hope it helps you.

score 2 · Answer 2 · edited May 23 '17 at 12:06

set tag for the button

[myButton addTarget:self action:@selector(btnSelected:) forControlEvents:UIControlEventTouchUpInside];
myButton.tag = 1;

now compare tag

-(IBAction)btnSelected:(id)sender {
    UIButton *button = (UIButton *)
    if(button.tag == 1) { //do button 1 stuff
        NSLog(@"btnSelected data is %@", sender);
    }
}

Also you can probably checkout Blocks, extend a uibutton to support blocks (UIButton block equivalent to addTarget:action:forControlEvents: method?).

score -1 · Accepted Answer · answered Jul 25 '13 at 12:46

-1

Try this,

[myButton setAccessibilityValue:@"Some text"];
[myButton addTarget:self action:@selector(btnSelected:) forControlEvents:UIControlEventTouchUpInside];

-(IBAction)btnSelected:(id)sender {
    NSLog(@"btnSelected data is %@", [sender accessibilityValue];);
    // I want to print some text for respective button here...    
}

answered Jul 25 '13 at 12:46

βhargavḯ

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3

This is very wrong, conceptually. Cluttering the accessibility options of the UI? No way... – Jul 25 '13 at 15:11
1

@JackyBoy And it doesn't even use jQuery! – Jul 25 '13 at 16:17

how to pass data when button is clicked

3 Answers3