1. ios11 tabBarController 去除 tabBar 不能再 viewDidLoad 而是 viewDidAppear
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// ios11 删除系统自动生成的UITabBarButton
for (UIView *child in self.tabBar.subviews) {
if ([child isKindOfClass:[UIControl class]]) {
[child removeFromSuperview];
}
}
}
