Question

i have an array with dictionaries,

. how to get the index for a specific dictionary… [where I got the data for the dictionary i want to find, but need the index is on]

NSMutableDictionary *dictois = [[NSMutableDictionary alloc]init];
[dictois setObject:@"easySpritedd" forKey:@"Nombre"];
[dictois setObject:@"X" forKey:@"290"];
[dictois setObject:@"Y" forKey:@"300"];

int fooIndex = [self.bloquesArray indexOfObject: dictois];

but as you see i dont know yet how to get the dictionary for comparing in the indexOfObject

thanks!

Answer 1

NSDictionary objects have the following comparison methods:

- (BOOL)isEqualToDictionary:(NSDictionary *)otherDictionary

With the following discussion

Two dictionaries have equal contents if they each hold the same number
of entries and, for a given key, the corresponding value objects in
each dictionary satisfy the isEqual: test.

This should be the case for you. Sadly you cannot change the method which NSArray uses to calculate the indexOfObject: so it can’t help you, hence the solution provided by Denis is the best I can think of (unless you fancy subclassing NSArray which I wouldn’t recommend).

---

Just as a complement to Denis’ answer you could use the NSArray method

- (NSIndexSet *)indexesOfObjectsPassingTest:(BOOL (^)(id obj, NSUInteger idx, BOOL *stop))predicate

instead of

- (NSUInteger)indexOfObjectPassingTest:(BOOL (^)(id obj, NSUInteger idx, BOOL *stop))predicate

If having several equal objects in the array is a possibility.