NSConstraints右对齐UITableViewCell内的文本字段

Question

我正在向UITableViewCell添加一个UITextField，并通过以下约束对齐它：

[cell addConstraint:[NSLayoutConstraint constraintWithItem:tf attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:cell.textLabel attribute:NSLayoutAttributeTrailing multiplier:1 constant:8]];
[cell addConstraint:[NSLayoutConstraint constraintWithItem:tf attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:cell.contentView attribute:NSLayoutAttributeTop multiplier:1 constant:8]];
[cell addConstraint:[NSLayoutConstraint constraintWithItem:tf attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:cell.contentView attribute:NSLayoutAttributeBottom multiplier:1 constant:-8]];
[cell addConstraint:[NSLayoutConstraint constraintWithItem:tf attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:cell.contentView attribute:NSLayoutAttributeTrailing multiplier:1 constant:-16]];

这很好用，直到我旋转视图。 UITextField并没有与单元格紧密相关。我只是缺少约束吗？

Answer 1

仅供参考我添加：

cell.contentView.autoresizingMask = UIViewContentModeScaleAspectFit;

到UITableCell并修复它！