UILineBreakMode与NSLineBreakMode对比 [英] UILineBreakMode Vs NSLineBreakMode

问题描述

我看到一些UIStringDrawing方法已更新为在iOS 6.0中使用NSLineBreakMode而不是UILineBreakMode：

I see some UIStringDrawing methods have been updated to use NSLineBreakMode instead of UILineBreakMode in iOS 6.0:

例如

- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(NSLineBreakMode)lineBreakMode

我如何检查这一点以确保我的iOS 5及以下用户继续使用UILineBreakMode？

How can I check for this to ensure my iOS 5 users and below continue to use UILineBreakMode?

推荐答案

无需检查。这些只是枚举，它们映射到相同的值

No checking is necessary. These are just enums and they map to the same values

您可以看到这里没有真正的区别：

You can see there is no real difference here:

UILineBreakMode vs NSLineBreakMode

  enum {
   NSLineBreakByWordWrapping = 0,
   NSLineBreakByCharWrapping,
   NSLineBreakByClipping,
   NSLineBreakByTruncatingHead,
   NSLineBreakByTruncatingTail,
   NSLineBreakByTruncatingMiddle
};
typedef NSUInteger NSLineBreakMode



typedef enum {
   UILineBreakModeWordWrap = 0,
   UILineBreakModeCharacterWrap,
   UILineBreakModeClip,
   UILineBreakModeHeadTruncation,
   UILineBreakModeTailTruncation,
   UILineBreakModeMiddleTruncation,
} UILineBreakMode;

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