Question

I am trying to sort the NSMutablArray values by Aa-Zz format in iPhone app. I have used the below code in my project.

for (id key in [dictionary allKeys])
        {
            id value = [dictionary valueForKey:key];
            [duplicateArray addObject:value];
            [value release];
            value =nil;
            NSSortDescriptor *sortdis = [[[NSSortDescriptor alloc] initWithKey:@"Name" ascending:YES] autorelease];
            NSArray *discriptor = [NSArray arrayWithObjects:sortdis,nil];
            mutableArray = [[duplicateArray sortedArrayUsingDescriptors:discriptor]retain];
        }   
        NSLog(@"mutableArray : %@", mutableArray);
[mutableArray sortUsingSelector:@selector(caseInsensitiveCompare:)];

The app getting crash with this error log: [__NSArrayI sortUsingSelector:]: unrecognized selector sent to instance.

But, i have searched and found the reason for the crash. My mutableArray values are like this,

(
        {
        Id = 00001;
        Name = "ABCD";
    },
        {
        Id = 00002;
        Name = "BCDE";
    },
        {
        Id = 00003;
        Name = "ZXYS";
    },
        {
        Id = 00004;
        Name = "abcd";
    },
        {
        Id = 00009;
        Name = "bcde";
    },
)

I want to sort this array valuse like ABCD, abcd, BCDE, bcde, ZXYs.
Can anyone please help to solve this.

Answer 1

Gopinath. Please use this updated code in your project.

    for (id key in [dictionary allKeys])
    {
        id value = [dictionary valueForKey:key];
        [duplicateArray addObject:value];
        [value release];
        value =nil;
        NSSortDescriptor *sortdis = [[[NSSortDescriptor alloc] initWithKey:@"Name" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]autorelease];
        NSArray *discriptor = [NSArray arrayWithObjects:sortdis,nil];
        mutableArray = [[duplicateArray sortedArrayUsingDescriptors:discriptor]retain];
    }   
    NSLog(@"mutableArray : %@", mutableArray);

I hope it will help you. Thanks.