UIBarButton项目文本颜色在iOS 11中不会更改

Question

UIBarButton项目文本颜色在ios 11中不变

[btnAddtoSheet setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIFont fontWithName:@"Helvetica Bold" size:15.0f],  NSFontAttributeName,[UIColor whiteColor],NSForegroundColorAttributeName,nil] forState:UIControlStateNormal];