NSMutableArray (addObject) not working inside if statement

Question

i have this code :

NSMutableArray *arr = [NSMutableArray array];
for (int i = 0; i <[titleNews count]; ++i) {
    TFHppleElement *someText =[titleNews objectAtIndex:i];
    NSString *result = [someText content];

    [arr addObject:result];
    if ([[arr objectAtIndex:i]isEqualToString:@"-- : --"]) {
        [arr replaceObjectAtIndex:i withObject:@"x"];
        [arr addObject:@"/"];

    }

    NSLog(@"%@",[arr objectAtIndex:i]);
}

the (replaceObjectAtIndex: withObject:) work fine but the (addObject)method not working

How can you tell it's not working? Did you dump the entire array? — Hot Licks
– Hot Licks, Commented Nov 6, 2011 at 23:36
@ Daniel ,no i want to add the (/) object after the (x) in the array — NouNou
– NouNou, Commented Nov 6, 2011 at 23:39
Add an NSLog(@"%@", arr); after the closing } of your loop, to see what's in the array where. You'll be surprised. — Hot Licks
– Hot Licks, Commented Nov 6, 2011 at 23:41

Hot Licks · Accepted Answer · 2011-11-06 23:40:27Z

2

You're presuming that the "result" that you add to the array will always be at index i. But the first time that you fall into your "if" body, you'll add an i+1 element ("/") and from then on everything will be off by one.

answered Nov 6, 2011 at 23:40

Hot Licks

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2 Comments

NouNou Over a year ago

thanks daniel but i am new to iphone programing .so how i can solve this problem

Hot Licks Over a year ago

You may be new to iPhone programming, but it's a simple general programming problem, not at all unique to iPhone. The NSMutableArray spec lists dozens of methods that may (or may not) help. Read them, think through what you're doing, and do some real programming, vs just modifying what you've already seen.

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