title: contraints in tableviewcell seem to be ignored
body: <p>I can't get these sliders to line up, Im not sure why.</p>
  
  <p><a href="https://i.stack.imgur.com/HjmNf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HjmNf.png" alt="sliders on wrong side"></a></p>
  
  <p>here's my storyboard ...that trailing constraint is clearly being ignored. What am I doing wrong?</p>
  
  <p><a href="https://i.stack.imgur.com/UdcJa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UdcJa.png" alt="storyboard"></a></p>
  
  <p>edit: for matt:</p>
  
  <h2>I deleted all constraints</h2>
  
  <p>and control-dragged two of them, which should have been sufficient: the <code>trailing: 14</code> and the <code>center Y</code> (now on superview, the rhs being label was in error). there is no "remove at runtime" on any drawn constraints.</p>
  
  <p><a href="https://i.stack.imgur.com/9Skwd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9Skwd.png" alt="View debugging showing issue flags"></a></p>
  
  <p>the flags are visible but there's no indication of what they mean (the size inspector unhelpfully says only "has ambiguous constraint").</p>
  
  <h2>edit #2</h2>
  
  <p>Based on input here and in swift discord, Here's an example of the view with changes applied:</p>
  
  <p><a href="https://i.stack.imgur.com/qUUbg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qUUbg.png" alt="rebuilt"></a>
  <a href="https://i.stack.imgur.com/6mQri.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6mQri.png" alt="result"></a>
  and here is the relevant xml of that storyboard:</p>
  
  <pre><code>                                    &lt;tableViewCell clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" restorationIdentifier="RootAppCell" preservesSuperviewLayoutMargins="YES" selectionStyle="none" indentationWidth="10" reuseIdentifier="RootAppCell" id="PDl-Cx-SrR" customClass="RootAppCell" customModule="Assignment_5"&gt;
                                      &lt;rect key="frame" x="0.0" y="28" width="343" height="44"/&gt;
                                      &lt;autoresizingMask key="autoresizingMask"/&gt;
                                      &lt;tableViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" preservesSuperviewLayoutMargins="YES" insetsLayoutMarginsFromSafeArea="NO" tableViewCell="PDl-Cx-SrR" id="EHS-uv-XgI" customClass="RootAppCell" customModule="Assignment_5"&gt;
                                          &lt;rect key="frame" x="0.0" y="0.0" width="343" height="43.5"/&gt;
                                          &lt;autoresizingMask key="autoresizingMask"/&gt;
                                          &lt;subviews&gt;
                                              &lt;switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="uDJ-B5-x3A"&gt;
                                                  &lt;rect key="frame" x="277" y="6" width="51" height="31"/&gt;
                                              &lt;/switch&gt;
                                              &lt;label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="App Name" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="fWL-xO-z8g"&gt;
                                                  &lt;rect key="frame" x="18" y="11" width="81" height="21"/&gt;
                                                  &lt;fontDescription key="fontDescription" type="system" pointSize="17"/&gt;
                                                  &lt;nil key="textColor"/&gt;
                                                  &lt;nil key="highlightedColor"/&gt;
                                              &lt;/label&gt;
                                          &lt;/subviews&gt;
                                          &lt;constraints&gt;
                                              &lt;constraint firstItem="fWL-xO-z8g" firstAttribute="centerY" secondItem="EHS-uv-XgI" secondAttribute="centerY" id="G84-Ys-Q8G"/&gt;
                                              &lt;constraint firstItem="fWL-xO-z8g" firstAttribute="leading" secondItem="EHS-uv-XgI" secondAttribute="leadingMargin" constant="3" id="JrD-j0-SxV"/&gt;
                                              &lt;constraint firstItem="uDJ-B5-x3A" firstAttribute="centerY" secondItem="EHS-uv-XgI" secondAttribute="centerY" id="Q5Q-sy-Qh7"/&gt;
                                              &lt;constraint firstAttribute="trailingMargin" secondItem="uDJ-B5-x3A" secondAttribute="trailing" constant="2" id="bMt-16-diy"/&gt;
                                              &lt;constraint firstItem="uDJ-B5-x3A" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="fWL-xO-z8g" secondAttribute="trailing" id="he7-G6-aBc"/&gt;
                                          &lt;/constraints&gt;
                                      &lt;/tableViewCellContentView&gt;
  </code></pre>