IOS 8，为cell.contentview添加约束

Question

我在一个具有动态内容的tableview单元格中有两个标签，因此表格视图单元格的高度取决于标签的高度。在每两个单元格后，表格视图单元格的约束不能正常工作标签＆＃39; s文本截断。

我在自定义类

中以编程方式使用了以下代码

NSMutableArray *constraintsArray = [[NSMutableArray alloc] init];
UIView *contentView = self.contentView;

[constraintsArray addObject:[NSLayoutConstraint constraintWithItem:contentView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:secondLabel attribute:NSLayoutAttributeLastBaseline multiplier:1.0 constant:8.0f]];

[constraintsArray addObject:[NSLayoutConstraint constraintWithItem:contentView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:0 multiplier:1.0 constant:114.0f]];

[constraintsArray addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-15-[firstLabel]-15-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(firstLabel)]];

[constraintsArray addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-15-[secondLabel]-15-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(secondLabel)]];

[self.contentView addConstraints:constraintsArray];

请提前感谢任何帮助