Question

I have an imageView and within it I put a button. I have two questions:

• How can I properly add a button without losing its functionality?
• How can I refer to my imageView within the method to animate the view?

The code:

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIImageView *grayFrame = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"expSqrGray.png"]];

    [self.view addSubview:grayFrame];

    grayFrame.frame = CGRectOffset(grayFrame.frame, 0, 0);

    UIButton *testButton = [UIButton buttonWithType:UIButtonTypeCustom];
    testButton.frame = CGRectMake(20, 20, 200, 44);
    testButton.backgroundColor = [UIColor blackColor];
    [testButton setTitle:@"Test" forState:UIControlStateNormal];
    [testButton addTarget:self action:@selector(tapped:) forControlEvents:UIControlEventTouchUpInside];

    [grayFrame addSubview:testButton];
    //[self.view addSubview:testButton];
}

Answer 1

I have little to no knowledge about Objective-C but what you probably want to do is to make grayFrame and testButton member variables of your class. That way, your whole class has access to those two objects.

For example:

// Test.H
@interface YourClass : NSObject {
   UIImageView * grayFrame;
   UIButton * testButton;
}

You can then have another method referring to either one of them.

- (void) initializeObjects {
   grayFrame = [ [ UIImageView alloc ] initWithImage:[ UIImage imageNamed:@"expSqrGray.png" ] ];
   testButton = [ UIButton buttonWithType:UIButtonTypeCustom ];

   // Do things here.
}