change the Status Bar style on button click

Question

I want to add capability for the user to change the System Status bar style from Light to Dark.

On app launch the style is Light.

I have added the following code on button click:

//on button click
[self setNeedsStatusBarAppearanceUpdate];

- (UIStatusBarStyle)preferredStatusBarStyle
{
    if(darkMode) {
        return UIStatusBarStyleDefault;
    } else {
        return UIStatusBarStyleLightContent;
    }
}

But the prefferredStatusBarStyle method is never called and no change to the status bar occurs.

i have seen that. Does not seem to apply in my case where i want to change the status bar on button click — s.d., Dec 21 '15 at 03:06
my bad.... i had the following set to NO in the `info.plist`. issue fixed `View controller-based status bar appearance` — s.d., Dec 21 '15 at 03:15

score 2 · Answer 1 · answered Mar 01 '17 at 12:40

2

Swift 3

Set that the status bar needs to be updated when you click on the button. In this way 'preferredStatusBarStyle' will be called.

setNeedsStatusBarAppearanceUpdate()

answered Mar 01 '17 at 12:40

Andrea.Ferrando

987
13
23

score 1 · Answer 2 · answered Dec 21 '15 at 05:21

#import "ViewController.h"

@interface ViewController ()
{
    int click;
}   
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
} 
- (IBAction)ButtonClick:(UIButton *)sender
{
        sender.selected=!sender.selected;
        if (sender.isSelected)
        {
            click=1;
        }
        else
        {
            click=0;
        }
        [self setNeedsStatusBarAppearanceUpdate];
}
- (UIStatusBarStyle)preferredStatusBarStyle
{
       if(click)
        {
            return UIStatusBarStyleDefault;
        } else
        {
            return UIStatusBarStyleLightContent;
        }
 }
}
@end

change the Status Bar style on button click

2 Answers2