对我来说最简单的解决方案是在Storyboard的textView上放一个高度约束，然后将textView和高度约束连接到代码:

@IBOutlet var myAwesomeTextView: UITextView!
@IBOutlet var myAwesomeTextViewHeight: NSLayoutConstraint!

然后在设置文本和段落样式后，在viewDidAppear中添加这个:

self.myAwesomeTextViewHeight.constant = self.myAwesomeTextView.contentSize.height

一些注意事项:

与其他解决方案相比，必须将isScrollEnabled设置为true才能使其工作。 在我的例子中，我在代码中设置自定义属性的字体，因此我必须在viewDidAppear中设置高度(在此之前它不会正常工作)。如果你没有在代码中更改任何文本属性，你应该能够在viewDidLoad或设置文本后的任何地方设置高度。

这个方法似乎适用于ios7

 // Code from apple developer forum - @Steve Krulewitz, @Mark Marszal, @Eric Silverberg
- (CGFloat)measureHeight
{
    if ([self respondsToSelector:@selector(snapshotViewAfterScreenUpdates:)])
    {
    CGRect frame = internalTextView.bounds;
    CGSize fudgeFactor;
    // The padding added around the text on iOS6 and iOS7 is different.
    fudgeFactor = CGSizeMake(10.0, 16.0);

    frame.size.height -= fudgeFactor.height;
    frame.size.width -= fudgeFactor.width;

    NSMutableAttributedString* textToMeasure;
    if(internalTextView.attributedText && internalTextView.attributedText.length > 0){
        textToMeasure = [[NSMutableAttributedString alloc] initWithAttributedString:internalTextView.attributedText];
    }
    else{
        textToMeasure = [[NSMutableAttributedString alloc] initWithString:internalTextView.text];
        [textToMeasure addAttribute:NSFontAttributeName value:internalTextView.font range:NSMakeRange(0, textToMeasure.length)];
    }

    if ([textToMeasure.string hasSuffix:@"\n"])
    {
        [textToMeasure appendAttributedString:[[NSAttributedString alloc] initWithString:@"-" attributes:@{NSFontAttributeName: internalTextView.font}]];
    }

    // NSAttributedString class method: boundingRectWithSize:options:context is
    // available only on ios7.0 sdk.
    CGRect size = [textToMeasure boundingRectWithSize:CGSizeMake(CGRectGetWidth(frame), MAXFLOAT)
                                              options:NSStringDrawingUsesLineFragmentOrigin
                                              context:nil];

    return CGRectGetHeight(size) + fudgeFactor.height;
}
else
{
    return self.internalTextView.contentSize.height;
}
}

非常容易工作的解决方案使用代码和故事板。

通过代码

textView.scrollEnabled = false

通过故事板

取消选中“滚动启用”

除此之外什么都不用做。

这是@jhibberd的快速版本

    let cell:MsgTableViewCell! = self.tableView.dequeueReusableCellWithIdentifier("MsgTableViewCell", forIndexPath: indexPath) as? MsgTableViewCell
    cell.msgText.text = self.items[indexPath.row]
    var fixedWidth:CGFloat = cell.msgText.frame.size.width
    var size:CGSize = CGSize(width: fixedWidth,height: CGFloat.max)
    var newSize:CGSize = cell.msgText.sizeThatFits(size)
    var newFrame:CGRect = cell.msgText.frame;
    newFrame.size = CGSizeMake(CGFloat(fmaxf(Float(newSize.width), Float(fixedWidth))), newSize.height);
    cell.msgText.frame = newFrame
    cell.msgText.frame.size = newSize        
    return cell

我找到了一种方法，根据里面的文本调整文本字段的高度，并根据文本字段的高度在下面安排一个标签!这是代码。

UITextView *_textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 10, 300, 10)];
NSString *str = @"This is a test text view to check the auto increment of height of a text view. This is only a test. The real data is something different.";
_textView.text = str;

[self.view addSubview:_textView];
CGRect frame = _textView.frame;
frame.size.height = _textView.contentSize.height;
_textView.frame = frame;

UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 5 + frame.origin.y + frame.size.height, 300, 20)];
lbl.text = @"Hello!";
[self.view addSubview:lbl];

禁用滚动

添加constaints

然后添加文本

[yourTextView setText:@"your text"];
[yourTextView layoutIfNeeded];

如果你使用UIScrollView，你也应该添加这个;

[yourScrollView layoutIfNeeded];

-(void)viewDidAppear:(BOOL)animated{
    CGRect contentRect = CGRectZero;

    for (UIView *view in self.yourScrollView.subviews) {
         contentRect = CGRectUnion(contentRect, view.frame);
    }
    self.yourScrollView.contentSize = contentRect.size;
}