Shortcuts in Objective-C to concatenate NSStrings
An option:
[NSString stringWithFormat:@"%@/%@/%@", one, two, three];
Another option:
I'm guessing you're not happy with multiple appends (a+b+c+d), in which case you could do:
NSLog(@"%@", [Util append:one, @" ", two, nil]); // "one two"NSLog(@"%@", [Util append:three, @"/", two, @"/", one, nil]); // three/two/one
using something like
+ (NSString *) append:(id) first, ...{ NSString * result = @""; id eachArg; va_list alist; if(first) { result = [result stringByAppendingString:first]; va_start(alist, first); while (eachArg = va_arg(alist, id)) result = [result stringByAppendingString:eachArg]; va_end(alist); } return result;}
Two answers I can think of... neither is particularly as pleasant as just having a concatenation operator.
First, use an NSMutableString
, which has an appendString
method, removing some of the need for extra temp strings.
Second, use an NSArray
to concatenate via the componentsJoinedByString
method.
If you have 2 NSString literals, you can also just do this:
NSString *joinedFromLiterals = @"ONE " @"MILLION " @"YEARS " @"DUNGEON!!!";
That's also useful for joining #defines:
#define STRINGA @"Also, I don't know "#define STRINGB @"where food comes from."#define JOINED STRINGA STRINGB
Enjoy.