Fast enumeration and adding objects to NSMutableArray

Question

I am attempting to add objects to NSMutableArray "allItems1"

for (PMGWine *w in [[PMGWineStore sharedStore]allItems]) {

    [allItems1 addObject:w];

    NSLog(@"%@", w);

}

    NSLog(@"%d", [allItems1 count]);

[[PMGWineStore sharedStore]allItems] consists of 15 objects which print out perfectly in the first NSLog statement. But [allItems1 count] shows 0. What am I doing wrong?

did you allocated allItems1 ? – Midhun MP Jan 04 '13 at 17:42 — Midhun MP, Jan 04 '13 at 17:42
I declared an NSMutableArray *allItems1. – Pete Jan 04 '13 at 17:43 — Pete, Jan 04 '13 at 17:43

Midhun MP · Accepted Answer · 2013-01-04T17:52:14.303

0

The issue is you are not allocated the allItems1 array.

Please add this line before the for loop.

allItems1 = [[NSMutableArray alloc] init];

Also you can use:

allItems1 = [[NSMutableArray arrayWithArray:[[PMGWineStore sharedStore] allItems]] retain];

or

allItems1 = [[PMGWineStore sharedStore] allItems] copy];

edited Jan 04 '13 at 17:52

answered Jan 04 '13 at 17:45

Midhun MP

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score 0 · Answer 2 · answered Jan 04 '13 at 17:45

You probably forgot to initialize allItems1 NSMutableArray. Before the for you write

allItems1 = [[NSMutableArray alloc] init];

You could also have written:

allItems1 = [NSMutableArray arrayWithArray:[[PMGWineStore sharedStore]allItems]];

instead of the for cycle.

Fast enumeration and adding objects to NSMutableArray

2 Answers2