与界面生成器和模拟器相比，为什么 UILabel 换行符位于设备上的不同位置？
最近，我在界面生成器中创建的几个多行 UILabels 遇到了一些问题。在界面生成器中，每个标签都足够大以容纳其包含的文本。同样，当我在模拟器中运行它时，每个标签都足够大。但是当我在我的设备上运行它时，一些黑魔法导致换行符发生在不同的位置，并且并非所有文本都可见。
我故意在 IB 中将有问题的标签设置得过大，这确实起到了作用，但我很好奇是什么导致了这些差异。有谁知道它可能是什么？
我通过 MonoTouch 使用 Xcode 4.2 中的界面生成器。手机是 3GS，运行 iOS 4.3.5，但我的模拟器似乎卡在 iOS 5 上（我猜这可能与此有关）。
I recently ran into a few problems with several multiline UILabels that I had created in interface builder. In interface builder, each label was large enough for the text it contained. Similarly, when I ran it in the simulator each label was large enough. But when I ran it on my device, some black magic caused the line breaks to occur at different places and not all of the text was visible.
I resorted to deliberately making the offending labels too big in IB, which did the trick, but I was left curious as to what was causing the differences. Does anyone have any idea what it might be?
I was using the interface builder in Xcode 4.2 through MonoTouch. The phone is a 3GS and runs iOS 4.3.5, but my simulator seems stuck on iOS 5 (which I guess might be something to do with it).
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看起来最可能的解释是不同版本的 iOS 使用略有不同的系统字体。 Interface Builder 和 iPhone 模拟器可能使用一种字体，但当我将其放在 iOS 4.3.5 手机上时，它使用另一种字体。我认为这很可能与操作系统有关，而不是与设备有关，因为我已经能够在运行 iOS 4.2 的 iPhone 4 上尝试它 - 行为与我的 3GS 上相同。
感谢 Krumelur 和 Mark Adams 的评论！
Looks like the most likely explanation is that the different versions of iOS use a slightly different System font. Interface Builder and the iPhone simulator were probably using one font, but when I put it on my iOS 4.3.5 phone it was using another. I think it is most likely to be something to do with the OS and not the device because I have since been able to try it on an iPhone 4 which was running iOS 4.2 - the behaviour was the same as on my 3GS.
Thanks to Krumelur and Mark Adams for the comments!