UISegmentedControl+Multiline

UISegmentedControl+Multiline.h

//
//  UISegmentedControl+Multiline.h
//
//  Created by Guilherme Araújo on 6/9/14.
//  Copyright (c) 2014 Guilherme Araújo. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UISegmentedControl (Multiline)

- (void)insertSegmentWithMultilineTitle:(NSString *)title atIndex:(NSUInteger)segment animated:(BOOL)animated;
- (void)insertSegmentWithMultilineAttributedTitle:(NSAttributedString *)attributedTitle atIndex:(NSUInteger)segment animated:(BOOL)animated;

@end

UISegmentedControl+Multiline.m

//
//  UISegmentedControl+Multiline.m
//
//  Created by Guilherme Araújo on 6/9/14.
//  Copyright (c) 2014 Guilherme Araújo. All rights reserved.
//

#import "UISegmentedControl+Multiline.h"

@interface UIView (LayerShot)

- (UIImage *)imageFromLayer;

@end

@implementation UIView (LayerShot)

- (UIImage *)imageFromLayer {
  UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 0);
  [self.layer renderInContext:UIGraphicsGetCurrentContext()];
  UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return image;
}

@end

@implementation UISegmentedControl (Multiline)

- (void)insertSegmentWithMultilineTitle:(NSString *)title atIndex:(NSUInteger)segment animated:(BOOL)animated {
  UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
  [label setTextColor:[self tintColor]];
  [label setBackgroundColor:[UIColor clearColor]];
  [label setFont:[UIFont systemFontOfSize:13]];
  [label setTextAlignment:NSTextAlignmentCenter];
  [label setLineBreakMode:NSLineBreakByWordWrapping];
  [label setNumberOfLines:0];
  
  [label setText:title];
  [label sizeToFit];
  
  [self insertSegmentWithImage:[label imageFromLayer] atIndex:segment animated:animated];
}

- (void)insertSegmentWithMultilineAttributedTitle:(NSAttributedString *)attributedTitle atIndex:(NSUInteger)segment animated:(BOOL)animated {
  UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
  [label setTextColor:[self tintColor]];
  [label setBackgroundColor:[UIColor clearColor]];
  [label setFont:[UIFont systemFontOfSize:13]];
  [label setTextAlignment:NSTextAlignmentCenter];
  [label setLineBreakMode:NSLineBreakByWordWrapping];
  [label setNumberOfLines:0];
  
  [label setAttributedText:attributedTitle];
  [label sizeToFit];
  
  [self insertSegmentWithImage:[label imageFromLayer] atIndex:segment animated:animated];
}

@end

@ugurcetinkaya see the comment above NSAttributedString

// the underlying attributed string drawn by the label, if set, the label ignores the properties above.

Also the label is converted to an image and the segmentedControl image tintColor takes over. You will need to override that programmatically or in storyboard.