iOS edit UIButton properties - objective-c

Question

I am working on the basics of iOS development.
So far I have a button that on press, will show some text. But what I want to do is after it is pressed, I want it to then change the text of the button, so far this is what I have:
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
//button.backgroundColor = [UIColor redColor];
button.titleLabel.textColor=[UIColor blackColor];
button.frame = CGRectMake(25, 100, 275, 60);
[button setTitle:#"Press this button to reveal the text!" forState:UIControlStateNormal];
[button addTarget:self action:#selector(button_method:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)button_method:(UIButton *)sender {
NSString *test = #"I am learning Objective-C for the very first time! Also, this is my first ever variable!";
// handle button press
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(25, 25, 275, 60)];
label.text = test;
label.numberOfLines = 0;
label.lineBreakMode = UILineBreakModeWordWrap;
//label.lineBreakMode = NSLineBreakByWordWrapping; //iOS 6 only
[self.view addSubview:label];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
When I try adding [button setTitle:#"You pressed the button"]; to button_method
This doesn't work... why? And how would I make it work?

Answer 1

When I try adding [button setTitle:#"You pressed the button"]; to button_method, it doesn't work... why?
Because that method is nonexistent on UIButton.
And how would I make it work?
By using a method that UIButton actually responds to. For example:
[sender setTitle:#"You pressed the button" forState:UIControlStateNormal];
And read the relevant documentation, please.

Answer 2

Your code will not change the title of the button. But simply add a label as a subview for your view. Is this what you want?
If you want to change the text on the button you will want to do sender.title.text = test; in your button_method
I also recommend adding a NSLog(#"Button pressed"); to your button press method to double check that it is being called.