2023年7月13日发(作者：)

关于系统导航栏背景在iOS15中⾃动隐藏的问题iOS 15的系统导航栏背景默认静⽌时隐藏，得页⾯能滑动且有内容经过导航栏区域才会显⽰...iOS15默认样式.GIF解决⽅法iOS 15后，需要⼿动设置UINavigationBar的scrollEdgeAppearance和standardAppearance属性才⾏。// OC- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { if (@available(iOS 15.0, *)) { UINavigationBar *navigationBar = [UINavigationBar appearance];

UINavigationBarAppearance *scrollEdgeAppearance = [[UINavigationBarAppearance alloc] init]; oundColor = or; EdgeAppearance = scrollEdgeAppearance;

UINavigationBarAppearance *standardAppearance = [[UINavigationBarAppearance alloc] init]; oundColor = olor; rdAppearance = standardAppearance; }

return YES;}// Swiftfunc application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [OptionsKey: Any]?) -> Bool { if #available(iOS 15.0, *) { let navigationBar = ance() EdgeAppearance = { let appearance = UINavigationBarAppearance() oundColor = .red return appearance }() rdAppearance = { let appearance = UINavigationBarAppearance() oundColor = .green return appearance }() }

return true}设置后的样式.GIF从效果上看的出：scrollEdgeAppearance：是处于顶部时的背景standardAppearance：是滑动后的背景更多的⾃定义效果都可以在对应的UINavigationBarAppearance实例⾥⾯设置其属性。如果想统⼀样式，scrollEdgeAppearance和standardAppearance都设置同⼀个appearance即可（不设置任何属性则是默认的⽑玻璃效果）：// OC- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { if (@available(iOS 15.0, *)) { UINavigationBar *navigationBar = [UINavigationBar appearance];

UINavigationBarAppearance *appearance = [[UINavigationBarAppearance alloc] init]; EdgeAppearance = appearance; rdAppearance = appearance; }

return YES;}// Swiftfunc application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [OptionsKey: Any]?) -> Bool { if #available(iOS 15.0, *) { let navigationBar = ance() let appearance = UINavigationBarAppearance() EdgeAppearance = appearance rdAppearance = appearance } return true}以前的样式.GIFThat's all, thanks.