Xcode 4.6, used as the name of the previous parameter rather than as part of the selector [duplicate]

Your first method is declaring the selector +addFormatPrice::. With spaces, it looks like

+ (NSString *)addFormatPrice:(double)dblPrice :(BOOL)booRemoveCurSymbol;

This is invoked like [NSString addFormatPrice:0.3 :YES].

What you should do is actually give a name to the previous parameter, such as

+ (NSString *)addFormatPrice:(double)dblPrice removeCurSymbol:(BOOL)booRemoveCurSymbol;

Which would then be invoked like [NSString addFormatPrice:0.3 removeCurSymbol:YES].