UITableViewCell+AutoLayoutDynamicHeightCalculation.h

//http://stackoverflow.com/a/24166645
//

#import <UIKit/UIKit.h>
typedef void (^UITableViewCellAutoLayoutRenderBlock)(void);
@interface UITableViewCell (AutoLayoutDynamicHeightCalculation)

/**
*  Grab an instance of the receiving type to use in order to calculate AutoLayout contraint driven dynamic height. The method pulls the cell from a nib file and moves any Interface Builder defined contrainsts to the content view.
*
*  @param name Name of the nib file.
*
*  @return collection view cell for using to calculate content based height
*/
+ (instancetype)heightCalculationCellFromNibWithName:(NSString *)name;

/**
*  Returns the height of the receiver after rendering with your model data and applying an AutoLayout pass
*
*  @param block Render the model data to your UI elements in this block
*
*  @return Calculated constraint derived height
*/
- (CGFloat)heightAfterAutoLayoutPassAndRenderingWithBlock:(UITableViewCellAutoLayoutRenderBlock)block collectionViewWidth:(CGFloat)width;

/**
*  Directly calls `heightAfterAutoLayoutPassAndRenderingWithBlock:collectionViewWidth` assuming a collection view width spanning the [UIScreen mainScreen] bounds
*/
- (CGFloat)heightAfterAutoLayoutPassAndRenderingWithBlock:(UITableViewCellAutoLayoutRenderBlock)block;

@end

UITableViewCell+AutoLayoutDynamicHeightCalculation.m

//http://stackoverflow.com/a/24166645
//

#import "UITableViewCell+AutoLayoutDynamicHeightCalculation.h"


@implementation UITableViewCell (AutoLayoutDynamicHeightCalculation)

#pragma mark Dummy Cell Generator

+ (instancetype)heightCalculationCellFromNibWithName:(NSString *)name
{
    UITableViewCell *heightCalculationCell = [[[NSBundle mainBundle] loadNibNamed:name owner:self options:nil] lastObject];
    [heightCalculationCell moveInterfaceBuilderLayoutConstraintsToContentView];
    return heightCalculationCell;
}

#pragma mark Moving Constraints

- (void)moveInterfaceBuilderLayoutConstraintsToContentView
{
    [self.constraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *constraint, NSUInteger idx, BOOL *stop) {
        [self removeConstraint:constraint];
        id firstItem = constraint.firstItem == self ? self.contentView : constraint.firstItem;
        id secondItem = constraint.secondItem == self ? self.contentView : constraint.secondItem;
        [self.contentView addConstraint:[NSLayoutConstraint constraintWithItem:firstItem
                                                                     attribute:constraint.firstAttribute
                                                                     relatedBy:constraint.relation
                                                                        toItem:secondItem
                                                                     attribute:constraint.secondAttribute
                                                                    multiplier:constraint.multiplier
                                                                      constant:constraint.constant]];
    }];
}

#pragma mark Height

- (CGFloat)heightAfterAutoLayoutPassAndRenderingWithBlock:(UITableViewCellAutoLayoutRenderBlock)block
{
    return [self heightAfterAutoLayoutPassAndRenderingWithBlock:block
                                            collectionViewWidth:CGRectGetWidth([[UIScreen mainScreen] bounds])];
}

- (CGFloat)heightAfterAutoLayoutPassAndRenderingWithBlock:(UITableViewCellAutoLayoutRenderBlock)block collectionViewWidth:(CGFloat)width
{
    NSParameterAssert(block);

    block();

    [self setNeedsUpdateConstraints];
    [self updateConstraintsIfNeeded];

    self.bounds = CGRectMake(0.0f, 0.0f, width, CGRectGetHeight(self.bounds));

    [self setNeedsLayout];
    [self layoutIfNeeded];

    CGSize calculatedSize = [self.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];

    return calculatedSize.height;

}

@end