UIView loading from xib need to resize dynamically with label text

Question

I am loading a custom UIView from xib. The UILabel text may be long with multiline. There is a UIButton below the UILabel. The UIView is loading as a custom subclass from the xib.

I need to resize whole UIView depending on the amount of text. But it is keeping the frame height which is set in xib. How can resize the UIView elastically with the UILabel text, as well as keep all the autolayout constraint intact.

I need the UIView frame size since I am showing it as a drop down view from top with animation.

The UILabel is sized ok. But text goes beyond UIView. The UIView need to be resized and I need the updated frame size.

Problem is showing here,

These lines fixes the autoresize, but I am not sure that's the right way.

CGRect myFrame = self.frame;
self.frame = CGRectMake(myFrame.origin.x, myFrame.origin.y, 
    myFrame.size.width, 
    self.labelMessage.frame.size.height + self.btClose.frame.size.height + 16); // magic number!

The whole class,

    #import "MessageView.h"

@implementation MessageView

@synthesize systemMessage = _systemMessage; //otherwise setter is not called

// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    [self updateUI];
}

- (void) updateUI {
//  DLog(@"%@", _systemMessage);
    if (_systemMessage.actionType == MessageActionDisappearing || _systemMessage.actionType == MessageActionDismissableRetry) {
        _btTryAgain.hidden = NO;
    } else {
        _btTryAgain.hidden = YES;
    }
    if (_systemMessage.actionType == MessageActionDismissable || _systemMessage.actionType == MessageActionDismissableRetry) {
        _btClose.hidden = NO;
    } else {
        _btClose.hidden = YES;
    }
    _borderView.backgroundColor = [self getBorderColor];
    _labelMessage.text = _systemMessage.message;
    CGRect myFrame = self.frame;
    self.frame = CGRectMake(myFrame.origin.x, myFrame.origin.y, myFrame.size.width,
                            self.labelMessage.frame.size.height + self.btClose.frame.size.height + 16); // magic number!
}

- (instancetype)initWithFrame:(CGRect)frame {
//  DLog(@"");
    self = [super initWithFrame:frame];
    [self xibSetup];
    return self;
}

- (void)awakeFromNib {
//  DLog(@"");
    [super awakeFromNib];
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
//  DLog(@"");
    self = [super initWithCoder:aDecoder];
    if (self.subviews.count == 0) {
        [self xibSetup];
    }
    return self;
}

- (void) xibSetup {
    UIView *v = [self loadViewFromXib];
    v.frame = self.bounds;
    [self addSubview:v];
}

- (UIView *)loadViewFromXib {
    UIView *v = [[[NSBundle mainBundle] loadNibNamed:@"MessageView" owner:self options:nil] firstObject];
    return v;
}

// isn't called!
- (CGSize)intrinsicContentSize
{
    DLog(@"%@", _labelMessage.text);
    CGSize size = self.labelMessage.intrinsicContentSize;
    size.height = size.height + _btTryAgain.frame.size.height + 16;
    size.width = self.intrinsicContentSize.width;
//  size.width  += 16;
    return size;
}

#pragma mark - Methods

/** Refresh the UI when message content is changed. */
- (void)setSystemMessage:(SystemMessage *)systemMessage {
    _systemMessage = systemMessage;
    [self updateUI];
}

- (UIColor *)getBorderColor {
    if (_systemMessage.messageType == MessageTypeWarning) {
        return [UIColor yellowColor];
    } else if (_systemMessage.messageType == MessageTypePositive) {
        return [UIColor greenColor];
    } else {
        return [UIColor blueColor];
    }
}

- (void) hideButtonWithId:(MessageViewButtonId)buttonId {
    if (buttonId == MessageViewButtonIdClose) {
        _btClose.hidden = YES;
    } else if (buttonId == MessageViewButtonIdTryAgain) {
        _btTryAgain. hidden = YES;
    }
}

- (NSString *)description {
    return [NSString stringWithFormat:@"%@, systemMessage: %@", [super description], _systemMessage];
}

#pragma mark - Actions

- (IBAction)didPressCloseButton:(id)sender {
    if ([_delegate respondsToSelector:@selector(messageView:didPressButtonWithId:)]) {
        [_delegate messageView:self didPressButtonWithId:MessageViewButtonIdClose];
    }
}

- (IBAction)didPressTryAgainButton:(id)sender {
    if ([_delegate respondsToSelector:@selector(messageView:didPressButtonWithId:)]) {
        [_delegate messageView:self didPressButtonWithId:MessageViewButtonIdTryAgain];
    }
}