Sparrow v2 with xcode 4.2 compile error

simonlucas

I've installed the new framework in xcode 4.2 and trying to compile barebones. Compiling for iOS 5.1 , I get the following kinds of error:

SPTextureAtlas.m: error: Semantic Issue: Array subscript is not an integer

[From what I can find out this style of subscripting only works when in ARC mode. But I seem to have that set to YES for the Sparrow target and the barebones target.]

Shilo

I believe that error is related to NSArray and NSMutableDictionary literals, which are used in Sparrow. Your SDK version may be too outdated for it. I believe you need to have LLVM 4.0 compiler for literals. So I think the oldest Xcode version for that is Xcode 4.4.

Last time I checked, I wasn't able to run Sparrow 2.0 on iOS 5.0 either. I could be completely wrong though. I don't know much about the details on requirements.

TTStu

Sparrow 2.0 working on iOS 5.1.1 here, compiled using 6.1 base SDK, target 5.0, armv7 and armv7s, LLVM 4.2, ARC yes, XCode 4.6.3

simonlucas

Thank-you Shilo and TTStu. So the current manual looks incorrect.

Setting up Xcode:
'You need at least Xcode 4.0 to work with Sparrow 2.0.'

And I need at least xcode 4.4. So bye bye my beloved Snow Leopard.

borrrden

I have dealt with this problem before. There is a way around it if you need to use an earlier version. See my answer here on Stack Overflow:

http://stackoverflow.com/a/11407844/1155387

Daniel should have no problem putting this trivial solution into Sparrow *wink wink*

simonlucas

borrrden, thanks for the info. So. it's possible but I'm a bit unclear from the Stackoverflow instructions at the moment. Would this mean me making edits throughout the whole Sparrow source? Or just a couple? I'm not sure whether it's something I could or should attempt.

If I really have to go to xcode 4.6 to move forward I will, but I dislike Mountain Lion intensely.

Shilo

Have you created a category before?

I won't get into the details, but heres an example for a category of NSArray and NSMutableArray for you:

@implementation NSArray (BackwardsCompatibility)

- (id)objectAtIndexedSubscript:(NSUInteger)idx
{
    return [self objectAtIndex:idx];
}

@end

@implementation NSMutableArray (BackwardsCompatibility)

- (void)setObject:(id)anObject atIndexedSubscript:(NSUInteger)index
{
    [self insertObject:anObject atIndex:index];
}

@end

You would need to create a category for NSDictionary and NSMutableDictionary also. I haven't tried this, so I'm not sure if you would need to categorize any more methods. I think this is a great idea though, it's worth using if you don't want to bother upgrading to Lion or Mountain Lion.

simonlucas

shilo, I remember the concept of categories from reading my Obj C 2.0 book. I'll bone up on them and run some experiments. Thanks!

simonlucas

I added the following category methods in NSArrayExtended and NSMutableArrayExtended.

Added imports in my main.m. I still get the error:

'Array subscript is not an integer' with (for example)
NSString *name = attributes[@"name"];

Is my application of categories correct?

==================

NSArrayExtended.h:
#import <Foundation/Foundation.h>

@interface NSArray (BackwardsCompatibility)

@end

NSArrayExtended.m:
#import "NSArrayExtended.h"

@implementation NSArray (BackwardsCompatibility)

(id)objectAtIndexedSubscript:(NSUInteger)idx
{
return [self objectAtIndex:idx];
}

@end

ditto for NSMutableArrayExtended.h and NSMutableArrayExtended.m.

borrrden

Actually my bad. This won't work on earlier versions of Xcode unless you switch the compiler out. I forgot about that somewhat important step @_@. It is a slightly complicated process (though people on Stack Overflow have provided a few solutions), and really the best thing to do would be to upgrade Xcode, if possible. If it is not possible, then you will either have to switch the compiler or convince Daniel to make a macro to detect whether or not modern syntax is available 😉.