在自定义设置导航背景色时，使用下面的方法，在iOS15+系统上不起作用：UINavigationBar*appearance=[UINavigationBarappearance];//[appearanceconfi];[appearancesetBarTintColor:[UIColorwhiteColor]];[appearancesetTintColor:[UIColorwhiteColor]];appearance.translucent=NO;NSMutableDictionary*textAttribute=[NSMutableDictionarydictionary];text