UILineBreakMode Vs NSLineBreakMode

Question

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

E.g.

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

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

Solution 1

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

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;

Solution 2

UILineBrakeMode is deprecated in ios6 http://developer.apple.com/library/ios/#documentation/uikit/reference/NSString_UIKit_Additions/Reference/Reference.html#//apple_ref/doc/c_ref/UILineBreakMode

Comments

[Basil Bourque]

See this same question, NSLineBreakMode enum and backwards compatibility.

[Daij-Djan]

they are equal but this offers no solution to the prob here

[brynbodayle]

Hmm? There is no real problem.

[Basil Bourque]

@Daij-Djan So the solution is to change your code to use NSLineBreakMode to avoid compiler warnings in the latest Xcode. When compiled, the code will run compatibly on the older iOS devices.