iOS自动调整标签高度

Question

我使用以下代码自动调整 UITableView 中标签的高度。它在大多数情况下都有效，但有时文本会被切断。我的代码有问题吗，或者我需要添加其他内容吗？ (代码基于this answer)

UILabel *textLabel = ((UILabel *)[cell viewWithTag:3]);
textLabel.text = text;

CGSize maximumLabelSize = CGSizeMake(296, FLT_MAX);

CGSize expectedLabelSize = [text sizeWithFont:textLabel.font constrainedToSize:maximumLabelSize lineBreakMode:textLabel.lineBreakMode];

//adjust the label the the new height.
CGRect newFrame = textLabel.frame;
newFrame.size.height = expectedLabelSize.height;
textLabel.frame = newFrame;

Answer 1

在 iOS 7 中 sizeWithFont: constrainedToSize: lineBreakMode: 已弃用，现在您应该使用:

 CGSize maxSize = CGSizeMake(296.f, FLT_MAX);
 CGRect labRect = [someText boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:textLabel.font} context:nil];


 textLabel.frame = CGRectMake(0, 0, maxSize.width, labRect.size.height);
 textLabel.text = someText;