I am wondering whether I can copy a certain amount of objects but not all from an array to another array. For example: bigArray has 10 objects, i just want to copy 4 objects from it into smallArray. Please help me out. Thanks a lot
NSMutableArray *smallArray = [bigArray mutableCopy];
Use the following method...
- (NSArray *)subarrayWithRange:(NSRange)range
As per Apple docs...
Returns a new array containing the receiving array’s elements that fall within the limits specified by a given range.
You can do like this.
NSMutableArray *smalllArray=[[NSMutableArray alloc] initWithArray:[bigArray subarrayWithRange:NSMakeRange(0, 5)]];
Depending on which objects you want to include in your sub-array you can either make the new array as a subset containing a specific range of the big array or you can base the sub array on certain criteria by making a search predicate.
For the contiguous range, use:
- (NSArray *)subarrayWithRange:(NSRange)range
For a more sophisticated selection, use:
- (NSArray *)filteredArrayUsingPredicate:(NSPredicate *)predicate
