NSMutableArray to NSDictionary and then add to an NSArray - xcode

Question

My app stores images in an NSMutableArray. I then call those objects and then send them through email in the mailSender.parts section of the code below. The problem is it only adds the first objectatindex when I need to add all objects. I am confused on how to make each image in the self.arrSlidshowImg NSMutableArray add to the vcfPart2 NSDictionary and then add it as an array object so the mailSender.parts will send all images. Any thoughts? I should also note that I did an NSLog to see the results adding this code NSLog(#"VCF: %#", vcfPart2);. The log file showed each value in vcfPart2. So the code is calling each response.
NSDictionary *vcfPart2;
for (int i = 0; i < self.arrSlidshowImg.count; i++) {
NSData *vcfData = [self.arrSlidshowImg objectAtIndex:i];
vcfPart2 = [JFMailSender partWithType:PartTypeFilePart
Message:[vcfData base64EncodedStringWithOptions:0]
ContentType:#"image/jpeg"
ContentTransferEncoding:#"base64"
FileName:[NSString stringWithFormat:#"Individual_%d", i]];
}
mailSender.parts = [NSArray arrayWithObjects:plainPart2,vcfPart2,nil];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
[mailSender sendMail];
});
});

Answer 1

The following comes from a simple reading of your code, and among other things I have not looked up JFMailSender:
You declare a variable vcfPart2 to hold a reference to a dictionary
You enter a loop
In the loop you assign a value to vcfPart2, this value is presumably a reference to a dictionary as you report no warnings
Step 3 is executed self.arrSlidshowImg.count times, ice per iteration of the loop
You exit the loop, at this point vcfPart2 will hold the last reference assigned to it, the previous self.arrSlidshowImg.count - 1 having been overwritten
Your concern appears to be that when you then use vcfPart2 it only references one dictionary - but that is all it can ever do, that is it's type.
Maybe you intended to create a dictionary in your loop and then add that dictionary to a mutable array so that after the loop the array contains all the dictionaries?
HTH