UISegmentedControl中的两行文本

尽我所能，我无法解决iOS7 iPhone应用程序的UISegmentedControl错误。

Try as I might, I can't solve a UISegmentedControl bug for an iOS7 iPhone app.

当我创建分段控件时，我使用此代码：

When I create the segmented control, I use this code:

NSArray *segmentedControlItemArray = [NSArray arrayWithObjects: @"Nominal:\n27 inch", @"Actual:\n700c x 23mm", @"Actual:\n700c x 20mm", nil];
_wheelDiameterSegmentedControl = [[UISegmentedControl alloc] initWithItems:segmentedControlItemArray];
_wheelDiameterSegmentedControl.frame = CGRectMake(0, 102, 290, 50);
_wheelDiameterSegmentedControl.selectedSegmentIndex = 0;
_wheelDiameterSegmentedControl.tintColor = [UIColor colorWithRed:0.35 green:0.4 blue:0.9 alpha:1.0];

for (id segment in [_wheelDiameterSegmentedControl subviews]) {
    for (id label in [segment subviews]) {
        if ([label isKindOfClass:[UILabel class]]) {
            UILabel *titleLabel = (UILabel *) label;
            titleLabel.numberOfLines = 0;   
        }   
    }  
}

[_wheelDiameterSegmentedControl addTarget:self
                     action:@selector(pickOne:)
           forControlEvents:UIControlEventValueChanged];

[_wheelDiameterMenuContainer addSubview:_wheelDiameterSegmentedControl];

可悲的是，我无法发布图片，或者我会向您展示完全控制的图片我想要：UISegmented Control中的每个段都有两行文本，其中的换行符合我要求的位置。

Sadly, I can't post images, or I would show you a picture of exactly the control I want: each of the segments in the UISegmented Control has two lines of text, with a line break exactly where I asked for it.

在旋转时，我会喜欢保持分段控件的全宽度，并且换行在宽阔的段中看起来很傻。所以，在willAnimateRotationToInterfaceOrientation中，我已经包含了以下代码，字符串中没有换行符：

On rotation, though, I'd like to keep the segmented control full-width, and the line breaks look silly in segments that wide. So, in willAnimateRotationToInterfaceOrientation, I've included the following code, with no line breaks in the strings:

    [_wheelDiameterSegmentedControl setFrame:CGRectMake(0, 102, 450, 50)];
    [_wheelDiameterSegmentedControl setTitle:@"Nominal: 27 inch" forSegmentAtIndex:0];
    [_wheelDiameterSegmentedControl setTitle:@"Actual: 700c x 23mm" forSegmentAtIndex:1];
    [_wheelDiameterSegmentedControl setTitle:@"Actual: 700c x 20mm" forSegmentAtIndex:2];

再一次，如果我可以插入图片，我会告诉你一幅图片想要：广泛的UISegmented控件，标签中没有换行符（每个标签1行文本）。

And once again, if I could insert an image, I would show you an image of exactly what I want: a wide UISegmented Control with no line breaks in the labels (1 line of text per label).

这是我遇到麻烦的地方。当我旋转回肖像时，我的选择似乎是：

Here's where I run in to trouble. My choices, when I rotate back to portrait, seem to be:

1行标签文本，截断，格式为

1 line of label text, truncated, with the format

实际：7 ...

当我只使用

[_wheelDiameterSegmentedControl setFrame:CGRectMake(0, 102, 290, 50)];

2行标签文本，截断，格式为

2 lines of label text, truncated, with the format

实际：

700c x ...

"Actual:
700c x ..."

当我重置大小并重置字符串值并重新运行将标签的numberOfLines设置为2的代码循环，使用

when I reset the size and also reset the string values and rerun the loop of code that sets the label's numberOfLines to 2, using

    NSArray *segmentedControlItemArray = [NSArray arrayWithObjects: @"Nominal:\n27 inch", @"Actual:\n700c x 23mm", @"Actual:\n700c x 20mm", nil];

    [_wheelDiameterSegmentedControl setTitle:[segmentedControlItemArray objectAtIndex:0] forSegmentAtIndex:0];
    [_wheelDiameterSegmentedControl setTitle:[segmentedControlItemArray objectAtIndex:1] forSegmentAtIndex:1];
    [_wheelDiameterSegmentedControl setTitle:[segmentedControlItemArray objectAtIndex:2] forSegmentAtIndex:2];
    for (id segment in [_wheelDiameterSegmentedControl subviews]) {
        for (id label in [segment subviews]) {
            if ([label isKindOfClass:[UILabel class]]) {
                UILabel *titleLabel = (UILabel *) label;
                titleLabel.numberOfLines = 2;
            }
        }
    }
    [_wheelDiameterSegmentedControl setFrame:CGRectMake(0, 102, 290, 50)];

3行标签文字，格式为

3 lines of label text, with the format

实际：

700c x

20mm

"Actual:
700c x
20mm"

这是我更换强制numberOfLines时得到的当我在第一时间设置UISegmentedControl时，numberOfLines = 0时，= 2以上。

which is what I get when I replace the forced numberOfLines = 2 above with the numberOfLines = 0 that worked when I set up the UISegmentedControl in the first place.

创建控件时我得到的是

实际：

700c x 20mm

"Actual:
700c x 20mm"

但无论我尝试过什么（将字符串和numberOfLines代码放入willRotateToInterfaceOrientation或didRotateFromInterfaceOrientation;重新设置更改文本之前UISegmentedControl的框架;更改文本后重新设置框架...），我无法得到我漂亮，整洁，双线标签。我在这里想念的是什么？

But no matter what I've tried (putting the string and numberOfLines code into willRotateToInterfaceOrientation or didRotateFromInterfaceOrientation; re-setting the frame of the UISegmentedControl before changing the text; re-setting the frame after changing the text...), I can't get my nice, neat, two-line label back. What am I missing here?