CODEWITHSUNDEEP
iphonexcodensmutablearrayplist
Jamie Gordon
Jamie Gordon

Reputation: 61

Remove item from NSMutableArray from PLIST

I have a plist which contains a number of quiz item are pulled randomly by using arc4random (), I want to remove each item after it's shown so that no questions are repeated, I've tried using [thisArray removeObjectAtIndex:r];, but the items still show. Any ideas?

NSString *path = [[NSBundle mainBundle] pathForResource:@"initialquestions" ofType:@"plist"];

NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:path]) {
    NSLog(@"The file exists");
    }
else {
    NSLog(@"The file does not exist");
}

NSMutableArray *thisArray = [[NSMutableArray alloc] initWithContentsOfFile:path];
NSLog(@"The array count: %i", [thisArray count]);

for (int i = 0; i < [thisArray count]; i++) {

    id obj;
    int r = arc4random() % [thisArray count];
    if(r<[thisArray count]){
        obj=[thisArray objectAtIndex:r];
    }
    else{
        //error message
    }

     QuestionTitle.text = [[thisArray objectAtIndex:r] objectForKey:@"QuestionTitle"];

     [btnA setTitle:[[thisArray objectAtIndex:r] objectForKey:@"A"] forState:UIControlStateNormal];
     [btnB setTitle:[[thisArray objectAtIndex:r] objectForKey:@"B"] forState:UIControlStateNormal];
     [btnC setTitle:[[thisArray objectAtIndex:r] objectForKey:@"C"] forState:UIControlStateNormal];

     [thisArray removeObjectAtIndex:r];

}

Upvotes: 0

Views: 143

Answers (1)

Anoop Vaidya
Anoop Vaidya

Reputation: 46543

As your array is shrinking, you need a reverse for loop :

for (int i = [thisArray count]-1; i > -1 ; i--) {
    ....
}

Upvotes: 1

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