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copied!<p>If you do want to bind to specific array indices, you could could create a wrapper object. Something like this. It lets you bind to <code>item0</code>, <code>item1</code> and so on. There is no range checking and it breaks if you change the size of the array, but you get the idea.</p> <p>Interface</p> <pre><code>@interface MyArrayBinder : NSObject { NSMutableArray *array; } - (id)initWithMutableArray:(NSMutableArray *)theArray; - (NSMutableArray *)array; @end </code></pre> <p>Implementation</p> <pre><code>#include <objc/runtime.h> static NSInteger _indexFromSelector(SEL sel) { return [[NSStringFromSelector(sel) stringByTrimmingCharactersInSet:[NSCharacterSet letterCharacterSet]] integerValue]; } static void _dynamicSetItem(MyArrayBinder *self, SEL sel, id obj) { [self.array replaceObjectAtIndex:_indexFromSelector(sel) withObject:obj]; } static id _dynamicItem(MyArrayBinder *self, SEL sel) { return [self.array objectAtIndex:_indexFromSelector(sel)]; } @implementation MyArrayBinder - (id)initWithMutableArray:(NSMutableArray *)theArray { self=[super init]; if (self) { array=theArray; for(NSUInteger i=0; i<[array count]; i++) { class_addMethod([self class], NSSelectorFromString([NSString stringWithFormat:@"item%lu", i]), (IMP) _dynamicItem, "@@:"); class_addMethod([self class], NSSelectorFromString([NSString stringWithFormat:@"setItem%lu:", i]), (IMP) _dynamicSetItem, "v@:@"); } } return self; } - (NSMutableArray *)array { return array; } @end </code></pre>

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