UIButton - Programmatic creation issue

Question

I am creating a UIButton programmatically as below.

- (void)viewDidLoad
{
    [paymentsHomeView setFrame:CGRectMake(0, 0, 320, 520)]; // paymentsHomeView is added and referenced in IB

    UIButton *paymentButton = [[UIButton alloc] initWithFrame:CGRectMake(10, 45, 300, 41)];
    paymentButton.titleLabel.text = @"Button";
    paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [paymentButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.paymentsHomeView addSubview:paymentButton];

    [super viewDidLoad];
}

-(void) buttonClicked {

    NSLog(@"buttonClicked");
}

There is no output for the above code. The button is not created.

Whereas the same works when I create UITextField .

Help me out. Thanks in advance..!

Answer 1

you need to set frame for button after init statement and you need to set title for button in different way

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self 
           action:@selector(buttonClicked:)
 forControlEvents:UIControlEventTouchDown];
[button setTitle:@"Button" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[self.view addSubview:button];

Answer 2

Try this one my friend..

UIButton *paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[paymentButton addTarget:self 
       action:@selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[paymentButton setTitle:@"Show View" forState:UIControlStateNormal];
 paymentButton.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[self.paymentsHomeView addSubview:paymentButton];

let me know is it working or not...!!!

Happy Coding!!!!

Answer 3

You are creating button here:

UIButton *paymentButton = [[UIButton alloc] initWithFrame:CGRectMake(10, 45, 300, 41)];

and again on this line you create another button so this overwrite the previous one, so you need to set the frame again:

paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

What I suggest do this:

 paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[paymentButton setFrame:CGRectMake(10, 45, 300, 41)];

    paymentButton.titleLabel.text = @"Button";
    [paymentButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.paymentsHomeView addSubview:paymentButton];

Answer 4

I have notated some problems here:

[paymentsHomeView setFrame:CGRectMake(0, 0, 320, 520)]; // paymentsHomeView is added and referenced in IB

UIButton *paymentButton = [[UIButton alloc] initWithFrame:CGRectMake(10, 45, 300, 41)];
paymentButton.titleLabel.text = @"Button";
// You just allocated a paymentButton above. Without ARC it is leaked here:
paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
// Now you have assigned an auto released button to paymentButton. It does not have a frame or text.
[paymentButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.paymentsHomeView addSubview:paymentButton];

Try this:

UIButton *paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
paymentButton.frame = CGRectMake(10, 45, 300, 41);
paymentButton.titleLabel.text = @"Button";
[paymentButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.paymentsHomeView addSubview:paymentButton];

Answer 5

For Custom Button use bellow code...

Remove this line

paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

and add this line which shows button with black background

paymentButton.titleLabel.textColor = [UIColor whiteColor];// set text color which you want
[paymentButton setBackgroundColor:[UIColor blackColor]];// set back color which you want

And for RoundRect Button use bellow code

    UIButton *paymentButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    paymentButton.frame = CGRectMake(10, 45, 300, 41);
    paymentButton.titleLabel.text = @"Button";
    [paymentButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.paymentsHomeView addSubview:paymentButton];
    [self.paymentsHomeView bringSubviewToFront:paymentButton];