Vertically centering a UITextField's attributedPlaceholder

I am currently unable to vertically align an attributedPlaceholder inside a UITextField and I've no idea why.

Here's what I am doing:

self.addressBar = [[UITextField alloc] initWithFrame: CGRectMake(...)];
self.addressBar.backgroundColor = [UIColor whiteColor];
self.addressBar.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"Placeholder text"
                                attributes:@{
                                             NSForegroundColorAttributeName: [UIColor colorWithRed:79/255.0f green:79/255.0f blue:79/255.0f alpha:0.5f],
                                             NSFontAttributeName : [UIFont fontWithName:@"Gotham-BookItalic" size:14.0],
                                             }
 ];
self.addressBar.delegate = self;
self.addressBar.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
[self.view addSubview:self.addressBar];

And here's what happening:

It's quite clear that this happens due to the fact that the UITextFieldLabel's height is 10px smaller than the UItextField itself, but I can't seem change that.

This only happens using an attributedPlaceholder though; the default placeholder property works just fine.

Any ideas?