將UiTableView綁定到（視圖控制器）與佈局定位點的視圖

我想'將'tableview視圖到它的容器，視圖控制器的視圖。由於UIView沒有錨點屬性，我試着用layoutMarginsGuide來做到這一點。將UiTableView綁定到（視圖控制器）與佈局定位點的視圖

UIView does not provide anchor properties for the layout margin attributes. Instead, the layoutMarginsGuide property provides a UILayoutGuide object that represents these margins. Use the guide’s anchor properties to create your constraints.

 let margins = self.view.layoutMarginsGuide 
    self.tableView.leadingAnchor.constraintEqualToAnchor(margins.leadingAnchor).active = true 
    self.tableView.trailingAnchor.constraintEqualToAnchor(margins.trailingAnchor).active = true

但運行此代碼我收到以下錯誤：

** Terminating app due to uncaught exception 'NSGenericException', reason: 'Unable to activate constraint with items <UITableView: 0x7fdfd0ab5e00; frame = (0 0; 768 1024); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7fdfd8452e00>; layer = <CALayer: 0x7fdfd84c11c0>; contentOffset: {0, 0}; contentSize: {0, 0}> and <UILayoutGuide: 0x7fdfd86d7ca0 - "UIViewLayoutMarginsGuide", layoutFrame = {{0, 0}, {0, 0}}, owningView = <UIView: 0x7fdfd75a8aa0; frame = (0 0; 768 1024); autoresize = W+H; layer = <CALayer: 0x7fdfd0409270>>> because they have no common ancestor. Does the constraint reference items in different view hierarchies? That's illegal.'

的重要組成部分：

...because they have no common ancestor. Does the constraint reference items in different view hierarchies? That's illegal.'

但是，這應該是怎樣工作的？

來源

2016-05-31 brainray

沒有這樣的問題在iOS模擬器9子視圖。 – BangOperator

第一個變化約束是這樣 self.tableView.leftAnchor.constraintEqualToAnchor(view.leftAnchor).active = true self.tableView.rightAnchor.constraintEqualToAnchor(view.rightAnchor).active = true

如果問題仍然存在，確保實現代碼如下新增爲圖

view.addSubview(tableView)

來源

2016-06-01 00:21:57

非常感謝！我確實已經添加了tableView _after_分配約束 – brainray

將UiTableView綁定到（視圖控制器）與佈局定位點的視圖

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