Get UIButton reference from viewDidLoad

Question

I am very new to iPhone development. I am trying to disable an already existing button but I cant actually obtain a pointer to a specific element in the view. For instance, I have the following in the viewController header

- (IBAction)one:(id)sender;

and the implementation is

- (IBAction)one:(id)sender {

}

which are just event handlers. However, I need disable the button when view opens and I am a little bit lost on how to obtain references to elements outside of the event handler.

So in other words, my thought is to have something like:

UIButton* myButton = //something

where the something is where I am lost on what to do. Any ideas? I greatly appreciate any help I get on here!

One way is to set tags to the button specific event & change when you want it.. — iCreative
– iCreative, Commented Oct 17, 2012 at 7:49

romeouald · Accepted Answer · 2012-10-17 07:50:07Z

You need to create a property for your button in the interface:

@property(nonatomic, retain) IBOutlet UIButton * button;

And add this to implementation:

@synthesize button;

Then connect the button to it in interface builder. After this you can disable the button by:

button.enabled = NO;

Hope I could help!

Unfortunately I cannot choose your answer for a few min, however one thing to add to this would be you need to @synthesize the variable in the implementation.Thank you very much!

Rajneesh071 · Accepted Answer · 2012-10-17 08:49:26Z

Just give tag to your button and access your button with tag value.

UIButton *btn = (UIButton*)[self.view viewWithTag:1]; [btn setHidden:YES];

Curious_k.shree · Accepted Answer · 2012-10-17 08:46:35Z

In your .h File

#import <UIKit/UIKit.h> @interface RpViewController : UIViewController @property (retain , nonatomic)IBOutlet UIButton *Btn1; @end

In your .m file , in implementation write this :

@synthesize Btn1; Now on interface , click on button. In button's properties - > Drawings - check Hidden checkbox. Wherever you want to show that button , just write. [Btn1 setHidden:FALSE];

Vinod ram · Accepted Answer · 2012-10-18 05:26:51Z

@property (strong, nonatomic) UIButton *button; @synthesize button; // In View Did Load... self.button = [UIButton buttonWithType:UIButtonTypeCustom]; // button can be of any type. [self.button setTag:1]; // if you have more buttons initialize it and set its tag. you can get to know which button was pressed using tags. [button addTarget:self action:@selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside]; -(void) buttonEvent:(UIButton *) sender { NSLog(@"%d",sender.tag); if(sender.tag == 1) { [self.button setEnabled:NO]; // This makes your button disabled, i.e you can see the button but you cannot click on it. [self.button setHidden:YES]; // This makes your button hidden. } }

if you have more doubts ping me back.

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