Animating status bar iOS 7 - ios

Question

Im trying (struggling) to implement a snapchat like error message display for my app (snapchat error messages slide down over the status bar somehow) in iOS7. I cannot for the life of me get my animation to work right. Here is my method that does the animation
- (void)animateHeaderViewWithText:(NSString *)text {
//add header views
[self.headerView addSubview:self.headerLabel];
[self.navigationController.view addSubview:self.headerView];
//Hide the Status Bar
statusBarHidden = TRUE;
[self setNeedsStatusBarAppearanceUpdate];
self.headerLabel.text = text;
[UIView animateWithDuration:.5 delay:0.0 options:UIViewAnimationOptionCurveEaseIn animations:^{
self.headerLabel.frame = CGRectMake(0, 0, 320, 20);
self.headerView.frame = CGRectMake(0, 0, 320, 20);
} completion:^(BOOL finished) {
[UIView animateWithDuration:.5 delay:5.0 options:UIViewAnimationOptionCurveEaseIn animations:^{
//UnHide the Status Bar
statusBarHidden = FALSE;
[self setNeedsStatusBarAppearanceUpdate];
self.headerLabel.frame = CGRectMake(0, -20, 320, 20);
self.headerView.frame = CGRectMake(0, -20, 320, 20);
} completion:^(BOOL finished) {
[self.headerView removeFromSuperview];
[self.headerLabel removeFromSuperview];
}];
}];
}
Only the second half of the animation really works right, the message slides back up fine and the status bar appears underneath it. However, the first half of the animation, when the view slides down, the status bar disappears causing my navigation bar to move up, screwing up my animation. How can I get my navigation bar to stay where it is initially placed, even when the status bar is gone

Answer 1

This code worked in portrait, but would need to be modified to work properly in both orientations. It uses a separate UIWindow as the overlay, so there's no need to hide or unhide the status bar.
#interface ViewController ()
#property (strong,nonatomic) UIWindow *dropdown;
#property (strong,nonatomic) UILabel *label;
#property (strong,nonatomic) UIWindow *win;
#end
#implementation ViewController
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.dropdown = [[UIWindow alloc] initWithFrame:CGRectMake(0, -20, 320, 20)];
self.dropdown.backgroundColor = [UIColor redColor];
self.label = [[UILabel alloc] initWithFrame:self.dropdown.bounds];
self.label.textAlignment = NSTextAlignmentCenter;
self.label.font = [UIFont systemFontOfSize:12];
self.label.backgroundColor = [UIColor clearColor];
[self.dropdown addSubview:self.label];
self.dropdown.windowLevel = UIWindowLevelStatusBar;
[self.dropdown makeKeyAndVisible];
[self.dropdown resignKeyWindow];
}
- (IBAction)dropDown:(UIButton *)sender {
[self animateHeaderViewWithText:#"This is my test string"];
}
-(void)animateHeaderViewWithText:(NSString *) text {
self.label.text = text;
CGRect frame = self.dropdown.frame;
frame.origin.y = 0;
[UIView animateWithDuration:.6 delay:0 options:0 animations:^{
self.dropdown.frame = frame;
}completion:^(BOOL finished) {
;
}];
}