StackOverflow2013

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POSaving an NSMutableArray filled with custom objects
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copied!<p>How do I save/read an NSMutableArray filled with objects I made a class for?</p> <p>This is what I have so far... (where 'ObjectA' represents my class, and 'objects' is an array containing many instances of 'ObjectA')</p> <pre><code>//Creating a file //1) Search for the app's documents directory NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; //2) Create the full file path by appending the desired file name NSString *documentFileName = [documentsDirectory stringByAppendingPathComponent:@"save.dat"]; //Load the array objects = [[NSMutableArray alloc] initWithContentsOfFile: _documentFileName]; if(objects == nil) { //Array file didn't exist... create a new one objects = [[NSMutableArray alloc]init]; NSLog(@"Did not find saved list, Created new list."); } else { NSLog(@"Found saved list, Loading list."); } </code></pre> <p>This will load an array if it exists. It works if the array is filled with property type objects like NSNumbers, I tested that. If I fill it with my own objects, it crashes! This is the error: (where 'objectAInt' is a private int belonging to 'ObjectA')</p> <pre><code>-[__NSCFNumber objectAInt]: unrecognized selector sent to instance 0x15d417f02013-11-19 17:28:58.645 My Project[1791:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber objectAInt]: unrecognized selector sent to instance 0x15d417f0' </code></pre> <p>What do I need to do to make my class, 'ObjectA', work with the save/read process like it does with NSNumbers and other NS objects of type (id)?</p> <p>Thank You!</p> <p>P.S. My class implements and is NSCoding compliant. If more information is needed please don't hesitate to ask! :)</p> <p>EDIT -- Here is my ObjectA (per request) (it is a subclass of NSObject)</p> <pre><code>// // ObjectA.m // My Project // // Created by Will Battel on 8/8/13. // // #import "ObjectA.h" @implementation ObjectA @synthesize objectAString, objectAString2, objectAString3, objectAInt; -(id)initWithName:(NSString *)_objectAString{ self = [super init]; objectAString = _objectAString; objectAInt = 2; objectAString3 = @"$0.00"; return self; } -(id)initWithCoder:(NSCoder *)decoder { self = [super init]; if (self) { NSLog(@"Decoding"); [self setObjectAString:[decoder decodeObjectForKey:@"objectAStringKey"]]; [self setObjectAString2:[decoder decodeObjectForKey:@"objectAString2Key"]]; [self setObjectAString3Price:[decoder decodeObjectForKey:@"objectAString3Key"]]; [self setobjectAInt:[decoder decodeIntForKey:@"objectAIntKey"]]; } return self; } -(void)encodeWithCoder:(NSCoder *)encoder { NSLog(@"Encoding"); [encoder encodeObject:objectAString forKey:@"objectAStringKey"]; [encoder encodeObject:objectAString2 forKey:@"objectAString2Key"]; [encoder encodeObject:objectAString3 forKey:@"objectAString3Key"]; [encoder encodeInt:objectAInt forKey:@"objectAIntKey"]; } @end </code></pre>

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