iphone – UISegmentedControl文本多行？

>创建一个多线UILabel
>用N行文本填写标签
>将标签转换成UIImage
>将图像设置为片段内容

这在iOS 4，5，6上顺利

和iOS 7(只是删除文字阴影)

MultiLineSegmentedControl – 头文件

//
//  MultiLineSegmentedControl.h
//
//  Created by Jens Kreiensiek on 20.07.11.
//  Copyright 2011 SoButz. All rights reserved.
//
#import <Foundation/Foundation.h>

@interface MultiLineSegmentedControl : UISegmentedControl
- (void)setMultilineTitle:(NSString *)title forSegmentAtIndex:(NSUInteger)segment;
@end

MultiLineSegmentedControl – 实现文件

//
//  MultiLineSegmentedControl.m
//
//  Created by Jens Kreiensiek on 20.07.11.
//  Copyright 2011 SoButz. All rights reserved.
//
#import "MultiLineSegmentedControl.h"
#import "UIView+LayerShot.h"

@interface MultiLineSegmentedControl()
@property (nonatomic,retain) UILabel *theLabel;
@end

@implementation MultiLineSegmentedControl
@synthesize theLabel;

- (void)dealloc
{
    self.theLabel = nil;
    [super dealloc];
}


- (UILabel *)theLabel
{
    if (!self->theLabel) {

        self->theLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        self->theLabel.textColor = [UIColor whiteColor];
        self->theLabel.backgroundColor = [UIColor clearColor];
        self->theLabel.font = [UIFont boldSystemFontOfSize:13];
        self->theLabel.textAlignment = UITextAlignmentCenter;
        self->theLabel.lineBreakMode = UILineBreakModeWordWrap;
        self->theLabel.shadowColor = [UIColor darkGrayColor];
        self->theLabel.numberOfLines = 0;
    }

    return self->theLabel;
}


- (void)setMultilineTitle:(NSString *)title forSegmentAtIndex:(NSUInteger)segment
{
    self.theLabel.text = title;
    [self.theLabel sizeToFit];

    [self setImage:self.theLabel.imageFromLayer forSegmentAtIndex:segment];
}

@end

UIView LayerShot – 头文件

//
//  UIView+LayerShot.h
//
//  Created by Jens Kreiensiek on 29.06.12.
//  Copyright (c) 2012 SoButz. All rights reserved.
//
#import <UIKit/UIKit.h>

@interface UIView (LayerShot)
- (UIImage *)imageFromLayer;
@end

UIView LayerShot – 实现文件

//
//  UIView+LayerShot.m
//
//  Created by Jens Kreiensiek on 29.06.12.
//  Copyright (c) 2012 SoButz. All rights reserved.
//
#import "UIView+LayerShot.h"
#import <QuartzCore/QuartzCore.h>

@implementation UIView (LayerShot)

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

@end

像普通的UISegmentedControl一样使用它：

...

MultiLineSegmentedControl *segment = [[MultiLineSegmentedControl alloc] 
    initWithItems:[NSArray arrayWithObjects:@"A",@"B",nil]];

segment.segmentedControlStyle = UISegmentedControlStyleBar;
segment.frame = CGRectMake(0,200,segment.frame.size.height * 1.5);

[segment setMultilineTitle:@"Title AnSubtitle A" forSegmentAtIndex:0];
[segment setMultilineTitle:@"Title BnSubtitle B" forSegmentAtIndex:1];

[self.view addSubview:segment];
[segment release];

...