Category on UILabel for easily sizing a label to fit in a given width.

UILabel+AOTSizingUtilities.h

//
// Created by Alex Manarpies on 03/02/15.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface UILabel (AOTSizingUtilities)

- (void)aot_sizeToFitInWidth:(CGFloat)width;
- (void)aot_sizeToFitInWidth:(CGFloat)width inPlace:(BOOL)inPlace;

@end

UILabel+AOTSizingUtilities.m

//
// Created by Alex Manarpies on 03/02/15.
//

#import "UILabel+AOTSizingUtilities.h"


@implementation UILabel (AOTSizingUtilities)

- (void)aot_sizeToFitInWidth:(CGFloat)width inPlace:(BOOL)inPlace {
    CGPoint originalOrigin = inPlace ? self.frame.origin : CGPointZero;

    CGSize maxSize = CGSizeMake(width, CGFLOAT_MAX);
    CGRect frame = [self.text boundingRectWithSize:maxSize
                                           options:NSStringDrawingUsesLineFragmentOrigin
                                        attributes:@{NSFontAttributeName : self.font}
                                           context:nil];
    frame.origin = originalOrigin;

    self.frame = CGRectIntegral(frame);
}

- (void)aot_sizeToFitInWidth:(CGFloat)width {
    [self aot_sizeToFitInWidth:width inPlace:YES];
}

@end