ios15 - 导航栏 setBackgroundImage 不适用于 iOS15

Question

- (void)viewDidLoad {
   [super viewDidLoad];
   [self.navigationController.navigationBar setBackgroundImage:xxx] forBarMetrics:UIBarMetricsDefault];
   [self.navigationController.navigationBar setBarTintColor:[UIColor redColor]];
}

它在 iOS14 上完美运行。
但是在 iOS15、XCode13 beta 上，它不再起作用了。

Answer 1

OC:

if (@available(iOS 15.0, *)) {
    UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init];
    [appearance configureWithOpaqueBackground];
    appearance.backgroundColor = [UIColor whiteColor];
    appearance.shadowColor = [UIColor whiteColor];
    appearance.shadowImage = [UIImage imageWithColor:[UIColor whiteColor]];
    self.navigationController.navigationBar.standardAppearance = appearance;
    self.navigationController.navigationBar.scrollEdgeAppearance = self.navigationController.navigationBar.standardAppearance;
}
    

迅速:

if #available(iOS 15.0, *) {
    let appearance = UINavigationBarAppearance()
    appearance.configureWithOpaqueBackground()
    appearance.backgroundColor = .white
    appearance.shadowColor = .white
    appearance.shadowImage = UIImage.color(.white)
    navigationController?.navigationBar.standardAppearance = appearance
    navigationController?.navigationBar.scrollEdgeAppearance = navigationController?.navigationBar.standardAppearance
}