- (void)initUIAppearance {
[UINavigationBar appearance].tintColor = [UIColor whiteColor];
[UINavigationBar appearance].barTintColor = [UIColor blackColor];
[UINavigationBar appearance].barStyle = UIBarStyleBlack;
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:@{NSFontAttributeName: [UIFont systemFontOfSize:16]} forState:UIControlStateNormal];
}
启动图设置