适配iOS11,为什么底部栏重叠了,为什么不能移除系统的tabBar，急急急

[a65859492]

http://blog.csdn.net/xyt8023y/article/details/44134791

原始模型是这样写的，一摸一样

-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];

self.navigationController.navigationBarHidden = YES;

// 删除系统自动生成的UItabButton
for (UIView *child in self.tabBar.subviews)
{
if ([child isKindOfClass:[UIControl class]])
{
[child removeFromSuperview];
}
}
}
也删除了系统的tabBar.
为什么还会重叠？ 并没有删除系统的tabBar

[a65859492]

iOS11删除tabBar后打印 (lldb) po self.tabBar.subviews <__NSArrayM 0x1c4444530>( <_UIBarBackground: 0x13bf32580; frame = (0 0; 320 49); userInteractionEnabled = NO; layer = <CALayer: 0x1c0828e20>>, <TabBar: 0x13bf332a0; frame = (0 0; 320 49); layer = <CALayer: 0x1c0829180>>, <UITabBarButton: 0x139dfb440; frame = (2 1; 103 48); opaque = NO; layer = <CALayer: 0x1c082d880>>, <UITabBarButton: 0x13bf479a0; frame = (109 1; 102 48); opaque = NO; layer = <CALayer: 0x1c082eca0>>, <UITabBarButton: 0x139e78930; frame = (215 1; 103 48); opaque = NO; layer = <CALayer: 0x1c042e3a0>> ) iOS10之前打印 (lldb) po self.tabBar.subviews <__NSArrayM 0x17005dac0>( <_UIBarBackground: 0x151d889b0; frame = (0 0; 320 49); userInteractionEnabled = NO; layer = <CALayer: 0x17423bf80>>, <TabBar: 0x151d81580; frame = (0 0; 320 49); layer = <CALayer: 0x174238720>> ) 明显是删除了 可是为什么还有添加？

[在路上奔跑的coder]

iOS11上只能隐藏，不能删除。因为控件内部在下一次layout时会自动把删除的元素加上去