iOS 修改导航栏验证2023-02-20

场景：特定页面需要修改状态栏的颜色

方法：可以利用view 的viewWillAppear 和 WillDisappear 分别设置和恢复，恢复的目的不影响其他页面

appear:  [self setStatusBarBackgroundColor:UIColor.blackColor];
disappear: [self setStatusBarBackgroundColor:UIColor.clearColor];

- (void)setStatusBarBackgroundColor:(UIColor *)color
{
    if (@available(iOS 13.0, *)) {
        static UIView *statusBar = nil;
        if (!statusBar) {
            static dispatch_once_t onceToken;
            dispatch_once(&onceToken, ^{
                statusBar = [[UIView alloc] initWithFrame:[UIApplication sharedApplication].keyWindow.windowScene.statusBarManager.statusBarFrame] ;
                [[UIApplication sharedApplication].keyWindow addSubview:statusBar];
                statusBar.backgroundColor= color;
                
            });
        } else {
            statusBar.backgroundColor= color;
        }
    } else {
        UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
        if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
            statusBar.backgroundColor= color;
        }
    }
}