Ios 视图分层如何影响视图定位？

这个问题已经被重写了，因为我认为它更多地与视图和层有关，而不是最初的“查找表视图的中心”。也希望找到另一个答案。

有问题的是，这是一组4个视图，用于在表视图和选项卡栏中显示活动

代码：

NSLog(@"view.center: %@", self.view.center);
NSLog(@"view.frame: %@", self.view.frame);

在第一次显示“加载”时产生：

view.center: {160, 250}
view.frame: {{0, 20}, {320, 460}}

对于第二次（及后续）显示：（在弹出日期选择器之后）

Self（ListViewController）是UITableViewController的子类因此，视图（或tableview）框架的高度正在更改。为什么？

我一直在探索，并在调试器中找到了这些信息，这似乎是相关的

--- Before ---
[self parentViewController]:
              <UITabBarController: 0x6e115a0>
[[self parentViewController] view]:
              <UILayoutContainerView: 0x6e1b750; frame = (0 0; 320 480); autoresize = W+H; layer = <CALayer: 0x6e0c8f0>>
self:         <ListsViewController: 0x6e13730>
[self tableView]: 
              <UITableView: 0x71e4000; frame = (0 20; 320 460); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x6834db0>; contentOffset: {0, 0}>
[[self view] subviews]:  (array)
              <UIImageView: 0x6825e30; frame = (0 453; 320 7); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x6835a90>>,
              <UIImageView: 0x68314e0; frame = (313 411; 7 20); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x683d120>>,
              <UIView: 0x6a054f0; frame = (0 0; 320 460); alpha = 0.4; tag = 12; layer = <CALayer: 0x6a07840>>,
              <UIView: 0x6a04c60; frame = (110 155.5; 100 100); alpha = 0.6; tag = 13; layer = <CALayer: 0x6a073c0>>,
              <UILabel: 0x6a07480; frame = (110 200.5; 100 50); text = 'Loading ...'; clipsToBounds = YES; userInteractionEnabled = NO; tag = 14; layer = <CALayer: 0x6a065b0>>,
              <UIActivityIndicatorView: 0x6a07a80; frame = (140 167.5; 40 40); tag = 15; layer = <CALayer: 0x6a07b40>>

--- After datepicker ---
[self parentViewController]:
              <UITabBarController: 0x6e115a0>
[self parentViewController] view]:
              <UILayoutContainerView: 0x6e1b750; frame = (0 0; 320 480); autoresize = W+H; layer = <CALayer: 0x6e0c8f0>> 
self:         <ListsViewController: 0x6e13730>
[self tableView]:
              <UITableView: 0x71e4000; frame = (0 0; 320 411); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x6834db0>; contentOffset: {0, 0}>
[[self view] subviews]:
              <DetailTableViewCell: 0xb642120; baseClass = UITableViewCell; frame = (0 369; 320 44); autoresize = W; layer = <CALayer: 0xb642230>>,
              <DetailTableViewCell: 0xb643850; baseClass = UITableViewCell; frame = (0 325; 320 44); autoresize = W; layer = <CALayer: 0xb643960>>,
              <DetailTableViewCell: 0xb6435c0; baseClass = UITableViewCell; frame = (0 281; 320 44); autoresize = W; layer = <CALayer: 0xb6436d0>>,
              <DetailTableViewCell: 0xb63cf30; baseClass = UITableViewCell; frame = (0 237; 320 44); autoresize = W; layer = <CALayer: 0xb63d130>>,
              <DetailTableViewCell: 0x6a14050; baseClass = UITableViewCell; frame = (0 193; 320 44); autoresize = W; layer = <CALayer: 0x6a16fb0>>,
              <DetailTableViewCell: 0x6a13760; baseClass = UITableViewCell; frame = (0 149; 320 44); autoresize = W; layer = <CALayer: 0x6a13870>>,
              <DetailTableViewCell: 0x6a10920; baseClass = UITableViewCell; frame = (0 105; 320 44); autoresize = W; layer = <CALayer: 0x6a10010>>,
              <DetailTableViewCell: 0xb63ce20; baseClass = UITableViewCell; frame = (0 60; 320 45); autoresize = W; layer = <CALayer: 0xb63c3e0>>,
              <UIImageView: 0x6825e30; frame = (0 404; 320 7); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x6835a90>>,
              <UIView: 0xb6477f0; frame = (0 0; 320 60); autoresize = W; layer = <CALayer: 0xb647820>>,
              <UIImageView: 0x68314e0; frame = (313 411; 7 20); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x683d120>>,
              <UIView: 0x6a098a0; frame = (0 0; 320 411); alpha = 0; tag = 9; animations = { opacity <CABasicAnimation: 0xb6279f0>; }; layer = <CALayer: 0x6a154b0>>,
              <UIDatePicker: 0x6a23350; frame = (0 455; 320 216); tag = 10; animations = { position <CABasicAnimation: 0xb63bd40>; }; layer = <CALayer: 0x6a20590>>,
              <UIToolbar: 0x6843f60; frame = (0 411; 320 44); opaque = NO; tag = 11; animations = { position=<CABasicAnimation: 0xb645f80>; }; layer = <CALayer: 0x6844a20>>,
              <UIView: 0xb60baa0; frame = (0 0; 320 411); alpha = 0.4; tag = 12; layer = <CALayer: 0xb626af0>>,
              <UIView: 0xb626b20; frame = (110 155.5; 100 100); alpha = 0.6; tag = 13; layer = <CALayer: 0xb626930>>,
              <UILabel: 0xb60cfb0; frame = (110 200.5; 100 50); text = 'Loading ...'; clipsToBounds = YES; userInteractionEnabled = NO; tag = 14; layer = <CALayer: 0xb60d020>>,
              <UIActivityIndicatorView: 0xb649e20; frame = (140 167.5; 40 40); tag = 15; layer = <CALayer: 0xb626960>>

---之前---
[自父视图控制器]：
[[self-parentViewController]视图]：
自我：
[自我表格视图]：
[[self view]子视图]：（数组）
,
,
,
,
,
---后日期选择器---
[自父视图控制器]：
[自父视图控制器]视图]：
自我：
[自我表格视图]：
[[self view]子视图]：
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,

您可以使用tableview.frame访问原点及其尺寸。您可以使用tablview.center，它是一个CGPoint，可以为您提供对象的中心点。

我最初是这么想的，后来添加了日志语句，用tableView代替view。第一次和随后的记录结果相同。视图和tableView之间没有区别（边界、中心和框架）。那么tableView必须被某些东西重叠（UITabBar？），也可以尝试手动设置框架。手动设置框架不是问题。我仍然在搜索为什么控制器的视图和表视图具有相同的帧和边界。还有，为什么self.tableView.Center给出了320 X 480窗口的中心（在第一个显示器上），而桌子下面有一个tabBar？没有。在搜索答案时，我发现：Xcode只接受self.tableView.frame。这让我相信我访问了错误的属性，因为前面的答案不清楚。但是，在tableview中使用IB，通过编程方式向现有窗口添加3个视图&一个不透明视图，使用

[self.view addSubview:refreshViewSquare]

。

--- Before ---
[self parentViewController]:
              <UITabBarController: 0x6e115a0>
[[self parentViewController] view]:
              <UILayoutContainerView: 0x6e1b750; frame = (0 0; 320 480); autoresize = W+H; layer = <CALayer: 0x6e0c8f0>>
self:         <ListsViewController: 0x6e13730>
[self tableView]: 
              <UITableView: 0x71e4000; frame = (0 20; 320 460); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x6834db0>; contentOffset: {0, 0}>
[[self view] subviews]:  (array)
              <UIImageView: 0x6825e30; frame = (0 453; 320 7); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x6835a90>>,
              <UIImageView: 0x68314e0; frame = (313 411; 7 20); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x683d120>>,
              <UIView: 0x6a054f0; frame = (0 0; 320 460); alpha = 0.4; tag = 12; layer = <CALayer: 0x6a07840>>,
              <UIView: 0x6a04c60; frame = (110 155.5; 100 100); alpha = 0.6; tag = 13; layer = <CALayer: 0x6a073c0>>,
              <UILabel: 0x6a07480; frame = (110 200.5; 100 50); text = 'Loading ...'; clipsToBounds = YES; userInteractionEnabled = NO; tag = 14; layer = <CALayer: 0x6a065b0>>,
              <UIActivityIndicatorView: 0x6a07a80; frame = (140 167.5; 40 40); tag = 15; layer = <CALayer: 0x6a07b40>>

--- After datepicker ---
[self parentViewController]:
              <UITabBarController: 0x6e115a0>
[self parentViewController] view]:
              <UILayoutContainerView: 0x6e1b750; frame = (0 0; 320 480); autoresize = W+H; layer = <CALayer: 0x6e0c8f0>> 
self:         <ListsViewController: 0x6e13730>
[self tableView]:
              <UITableView: 0x71e4000; frame = (0 0; 320 411); clipsToBounds = YES; opaque = NO; autoresize = W+H; layer = <CALayer: 0x6834db0>; contentOffset: {0, 0}>
[[self view] subviews]:
              <DetailTableViewCell: 0xb642120; baseClass = UITableViewCell; frame = (0 369; 320 44); autoresize = W; layer = <CALayer: 0xb642230>>,
              <DetailTableViewCell: 0xb643850; baseClass = UITableViewCell; frame = (0 325; 320 44); autoresize = W; layer = <CALayer: 0xb643960>>,
              <DetailTableViewCell: 0xb6435c0; baseClass = UITableViewCell; frame = (0 281; 320 44); autoresize = W; layer = <CALayer: 0xb6436d0>>,
              <DetailTableViewCell: 0xb63cf30; baseClass = UITableViewCell; frame = (0 237; 320 44); autoresize = W; layer = <CALayer: 0xb63d130>>,
              <DetailTableViewCell: 0x6a14050; baseClass = UITableViewCell; frame = (0 193; 320 44); autoresize = W; layer = <CALayer: 0x6a16fb0>>,
              <DetailTableViewCell: 0x6a13760; baseClass = UITableViewCell; frame = (0 149; 320 44); autoresize = W; layer = <CALayer: 0x6a13870>>,
              <DetailTableViewCell: 0x6a10920; baseClass = UITableViewCell; frame = (0 105; 320 44); autoresize = W; layer = <CALayer: 0x6a10010>>,
              <DetailTableViewCell: 0xb63ce20; baseClass = UITableViewCell; frame = (0 60; 320 45); autoresize = W; layer = <CALayer: 0xb63c3e0>>,
              <UIImageView: 0x6825e30; frame = (0 404; 320 7); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x6835a90>>,
              <UIView: 0xb6477f0; frame = (0 0; 320 60); autoresize = W; layer = <CALayer: 0xb647820>>,
              <UIImageView: 0x68314e0; frame = (313 411; 7 20); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x683d120>>,
              <UIView: 0x6a098a0; frame = (0 0; 320 411); alpha = 0; tag = 9; animations = { opacity <CABasicAnimation: 0xb6279f0>; }; layer = <CALayer: 0x6a154b0>>,
              <UIDatePicker: 0x6a23350; frame = (0 455; 320 216); tag = 10; animations = { position <CABasicAnimation: 0xb63bd40>; }; layer = <CALayer: 0x6a20590>>,
              <UIToolbar: 0x6843f60; frame = (0 411; 320 44); opaque = NO; tag = 11; animations = { position=<CABasicAnimation: 0xb645f80>; }; layer = <CALayer: 0x6844a20>>,
              <UIView: 0xb60baa0; frame = (0 0; 320 411); alpha = 0.4; tag = 12; layer = <CALayer: 0xb626af0>>,
              <UIView: 0xb626b20; frame = (110 155.5; 100 100); alpha = 0.6; tag = 13; layer = <CALayer: 0xb626930>>,
              <UILabel: 0xb60cfb0; frame = (110 200.5; 100 50); text = 'Loading ...'; clipsToBounds = YES; userInteractionEnabled = NO; tag = 14; layer = <CALayer: 0xb60d020>>,
              <UIActivityIndicatorView: 0xb649e20; frame = (140 167.5; 40 40); tag = 15; layer = <CALayer: 0xb626960>>