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iosobjective-cnsarray

IOS get 10 object from MutableArray

I have a NSMutableArray *allObject, my allObject have 22 objects inside.

And now I want to get 10 objects when I click button More.

I am using:

NSArray *arrrTemp = [arrObject subarrayWithRange:NSMakeRange(from_index, 10)];

1st, I got 10 object from allObject

2nd, I got 10 next object from allObject

It's OK.

But, 3rd: It's crash app. I think subarrayWithRange:NSMakeRange(from_index, 10) ---> 10 is problem.

How to I can resolve this problem?

Solution

  • You need to check if there are at least 10 objects left.

    NSInteger length = MIN(10, arrObject.count - from_index);
NSRange range = NSMakeRange(from_index, length);
NSArray *arrrTemp = [arrObject subarrayWithRange:range];