How to Add UIImage to NSMutableArray

Question

I'm trying to add my UIImage from web service to my NSMutableArray using this code:

for (int i=0; i<[totalRowCountString intValue]; i++)
{    
    NSString *criticsRatingString = [[JSON valueForKeyPath:@"movies.ratings.critics_rating"] componentsJoinedByString:@" "];
    NSLog(@"criticsRatingString: %@", criticsRatingString);

    if ([criticsRatingString isEqualToString:@"Certified Fresh"])
    {
        self.ratingImage = [UIImage imageNamed:@"rt_certified_fresh.png"];
    }
    else if ([criticsRatingString isEqualToString:@"Fresh"])
    {
        self.ratingImage = [UIImage imageNamed:@"rt_fresh.png"];
    }
    else if ([criticsRatingString isEqualToString:@"Rotten"])
    {
        self.ratingImage = [UIImage imageNamed:@"rt_rotten.png"];
    }
    else if ([criticsRatingString isEqualToString:@"Spilled"])
    {
        self.ratingImage = [UIImage imageNamed:@"rt_spilled.png"];
    }
    else if ([criticsRatingString isEqualToString:@"Upright"])
    {
        self.ratingImage = [UIImage imageNamed:@"rt_upright.png"];
    }

    [tomatorRatingImages addObject:self.ratingImage];
    NSLog(@"tomatoRatingImages: %@", tomatorRatingImages);
}

But my NSLog for tomatoRatingImages returns NULL. Any ideas why it returns NULL?

UPDATE: my NSMutableArray is already initialized in my viewWillAppear method.

endy · Accepted Answer · 2013-02-14 03:09:38Z

3

You must initialize the array before adding objects to it.

NSMutableArray *tomatorRatingImages = [[NSMutableArray alloc] init];

answered Feb 14, 2013 at 3:09

endy

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1 Comment

jaytrixz Over a year ago

Never mind. I found the answer. There was just a typo error somewhere in my viewWillAppear and I didn't initialized it properly. Thanks endy for pointing it out.

sumit rathore · Accepted Answer · 2016-04-22 14:52:59Z

2

NSMutableArray * tomatorRatingImages =[[NSMutableArray alloc]init];

[tomatorRatingImages  addObject:[UIImage imageNamed:@"rt_spilled.png"]];

[tomatorRatingImages  addObject:[UIImage imageNamed:@"rt_spilled1.png"]];

[tomatorRatingImages  addObject:[UIImage imageNamed:@"rt_spilled2.png"]];

you can enter multiple image in NSMutableArray.

edited Apr 22, 2016 at 14:52

sumit rathore

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answered Feb 14, 2013 at 7:35

SanjayPatel

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Comments

Shashank · Accepted Answer · 2013-02-14 09:30:41Z

1

If you have a property for the NSMutableArray instance, it's better to write getter to initialize it. It takes care of initializing the variable only ones also it gets loaded only when it's required.

   -(NSMutableArray *) tomatorRatingImages {
         if(_tomatorRatingImages == nil) {
               _tomatorRatingImages = [NSMutableArray alloc] init];
         }
         return _tomatorRatingImages;
    }

answered Feb 14, 2013 at 9:30

Shashank

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Comments

Lithu T.V · Accepted Answer · 2013-02-14 06:51:54Z

0

Initialize like this

NSMutableArray * tomatorRatingImages =[[NSMutableArray alloc]initWithCapacity:3];

answered Feb 14, 2013 at 6:51

Lithu T.V

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