问向单元格动态添加子视图将导致布局约束错误输出。

EN

this.ContentView.AddSubviews(this.firstButton, this.secondButton);
this.detailView.AddSubviews(this.textField1, this.textField2, this.textField3, this.textField4, this.textField5);

this.ContentView.ConstrainLayout(() =>
    this.firstButton.Top() == this.ContentView.Top() + Layout.StandardSiblingViewSpacing &&
    this.firstButton.Bottom() <= this.ContentView.Bottom() - Layout.StandardSiblingViewSpacing &&
    this.firstButton.Left() == this.ContentView.Left() + Layout.StandardSuperviewSpacing &&
    this.secondButton.Top() == this.firstButton.Top() &&
    this.secondButton.Bottom() <= this.ContentView.Bottom() - Layout.StandardSiblingViewSpacing &&
    this.secondButton.Left() == this.firstButton.Left());

this.detailView.ConstrainLayout(() =>
    this.textField1.Top() == this.detailView.Top() &&
    this.textField1.Left() == this.detailView.Left() &&
    this.textField1.Right() == this.detailView.Right() &&
    this.textField2.Top() == this.textField1.Bottom() + Layout.StandardSiblingViewSpacing &&
    this.textField2.Left() == this.textField1.Left() &&
    this.textField2.Right() == this.textField1.Right() &&
    this.textField3.Top() == this.textField2.Bottom() + Layout.StandardSiblingViewSpacing &&
    this.textField3.Left() == this.textField2.Left() &&
    this.textField3.Right() == this.textField2.Right() &&
    this.textField4.Top() == this.textField3.Bottom() + Layout.StandardSiblingViewSpacing &&
    this.textField4.Left() == this.textField3.Left() &&
    this.textField4.Right() == this.textField3.Right() &&
    this.textField5.Top() == this.textField4.Bottom() + Layout.StandardSiblingViewSpacing &&
    this.textField5.Bottom() <= this.detailView.Bottom() - Layout.StandardSiblingViewSpacing &&
    this.textField5.Left() == this.textField4.Left() &&
    this.textField5.Right() == this.textField4.Right());

private void AnimateDetailsIn()
{
    this.ContentView.AddSubview(this.detailView);
    this.ContentView.ConstrainLayout(() =>
        this.detailView.Top() == this.ContentView.Top() + Layout.StandardSiblingViewSpacing &&
        this.detailView.Bottom() <= this.ContentView.Bottom() - Layout.StandardSiblingViewSpacing &&
        this.detailView.Left() == this.secondButton.Right() + Layout.StandardSiblingViewSpacing &&
        this.detailView.Right() == this.ContentView.Right() - Layout.StandardSuperviewSpacing);

    var tableView = this.FindParent<UITableView>();

    if (tableView == null)
    {
        return;
    }

    tableView.BeginUpdates();
    tableView.EndUpdates();
}

Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x7fccb670 'UIView-Encapsulated-Layout-Height' V:[UITableViewCellContentView:0x7fd8efd0(36)]>",
    "<NSLayoutConstraint:0x7fd94330 V:|-(0)-[UITextField:0x7fd905a0]   (Names: '|':UIView:0x7fd90050 )>",
    "<NSLayoutConstraint:0x7fd943c0 V:[UITextField:0x7fd905a0]-(8)-[UITextField:0x7fd90e90]>",
    "<NSLayoutConstraint:0x7fd94450 V:[UITextField:0x7fd90e90]-(8)-[UITextField:0x7fd91720]>",
    "<NSLayoutConstraint:0x7fd944e0 V:[UITextField:0x7fd91720]-(8)-[UITextField:0x7fd91fb0]>",
    "<NSLayoutConstraint:0x7fd94570 V:[UITextField:0x7fd91fb0]-(8)-[UITextField:0x7fd92850]>",
    "<NSLayoutConstraint:0x7fd945a0 UITextField:0x7fd92850.bottom <= UIView:0x7fd90050.bottom - 8>",
    "<NSLayoutConstraint:0x7fdaa080 V:|-(8)-[UIView:0x7fd90050]   (Names: '|':UITableViewCellContentView:0x7fd8efd0 )>",
    "<NSLayoutConstraint:0x7fdaa200 UIView:0x7fd90050.bottom <= UITableViewCellContentView:0x7fd8efd0.bottom - 8>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x7fd94570 V:[UITextField:0x7fd91fb0]-(8)-[UITextField:0x7fd92850]>