iPhone - properties of a list of files - iphone

Question

I have an mutableArray which displays a list of files in a tableView. I have stored those files in a directory.
I am using NSfileManager class and attributesOfItemAtPath method to retrieve some properties of the files like fileSize, fileType..
In the second stage I am trying to have a detailView controller which displays the properties of the particular file when touched in the tableView.
The problem is I dont know how to bind those properties like fileSize and fileType separately to a NSDictionary and make it display in the detailView for that particular file.
Here is my source code for listing the files and to list the properties.
- (void)listFiles {
NSFileManager *fm =[NSFileManager defaultManager];
NSError *error = nil;
NSString *parentDirectory = #"/Users/akilan/Documents";
NSArray *paths = [fm contentsOfDirectoryAtPath:parentDirectory error:&error];
if (error) {
NSLog(#"%#", [error localizedDescription]);
error = nil;
}
directoryContent = [[NSMutableArray alloc] init];
for (NSString *path in paths){
NSString *documentsDirectory = [[path lastPathComponent] stringByDeletingPathExtension];
[directoryContent addObject:documentsDirectory];
}
}
-(void) willProcessPath {
NSString *parentDirectory = #"/Users/akilan/Documents";
NSArray *paths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:parentDirectory error:nil];
for (NSString *path in paths){
filesPath = [parentDirectory stringByAppendingPathComponent:path];
NSDictionary *attrDir = [[NSFileManager defaultManager]attributesOfItemAtPath:filesPath error:nil];
filesSize = [attrDir objectForKey:NSFileSize];
filesName = (NSString *)directoryContent;
filesType = [path pathExtension];
createdDate = [attrDir objectForKey:NSFileCreationDate];
modifiedDate = [attrDir objectForKey:NSFileModificationDate];
}
}
Please help me to proceed to the next step.. Thanks in advance..

Answer 1

Try something like this:
- (void)viewDidLoad {
[super viewDidLoad];
[self listFiles];
}
- (void)listFiles {
NSFileManager *fm =[NSFileManager defaultManager];
NSError *error = nil;
NSString *parentDirectory = [self getDocumentsPath];
NSArray *paths = [fm contentsOfDirectoryAtPath:parentDirectory error:&error];
if (error) {
NSLog(#"%#", [error localizedDescription]);
error = nil;
}
NSMutableArray *array = [[NSMutableArray alloc] init];
self.directoryContent = array;
[array release];
for (NSString *path in paths){
NSString *fullPath = [self getPathToFileInDocumentsDirectory:path];
NSMutableDictionary *filePropertiesDictionary = [NSMutableDictionary dictionaryWithDictionary:[[NSFileManager defaultManager] attributesOfItemAtPath:fullPath error:nil]];
[filePropertiesDictionary setObject:fullPath forKey:#"fullPath"];
[filePropertiesDictionary setObject:path forKey:#"fileName"];
[directoryContent addObject:filePropertiesDictionary];
}
NSLog(#"%#", directoryContent);
}
- (NSString *)getDocumentsPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0];
return documentsDirectoryPath;
}
- (NSString *)getPathToFileInDocumentsDirectory:(NSString *)fileName {
return [[self getDocumentsPath] stringByAppendingPathComponent:fileName];
}

Answer 2

Why not create a class "FileDescriptor" with the following properties:
NSString *fileName;
NSString *fileSize;
NSString *fileType;
NSDate *createdDate;
NSDate *modifiedDate;
When iterating over your directory, you create an instance of this class for each file, and store that in an array (or a dictionary, if you like). Then you can use that array to
a) provide data for your UITableViewCells
b) show a detail view for each file when the cell is clicked.
Should you want to use a dictionary instead (which I think is a lot less "clean") you can do so like this:
NSDictionary *fileProperties = [NSDictionary dictionaryWithObjectsAndKeys:
fileSize, #"fileSize",
fileName, #"fileName", nil];

Answer 3

- (void)listFiles {
NSFileManager *fm =[NSFileManager defaultManager];
NSError *error = nil;
NSString *parentDirectory = #"/Users/akilan/Documents";
NSArray *paths = [fm contentsOfDirectoryAtPath:parentDirectory error:&error];
if (error) {
NSLog(#"%#", [error localizedDescription]);
error = nil;
}
directoryContent = [[NSMutableArray alloc] init];
for (NSString *path in paths){
NSString *documentsDirectory = [[path lastPathComponent] stringByDeletingPathExtension];
[directoryContent addObject:documentsDirectory];
}
}
-(void) willProcessPath {
NSString *parentDirectory = #"/Users/akilan/Documents";
NSArray *paths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:parentDirectory error:nil];
for (NSString *path in paths){
filesPath = [parentDirectory stringByAppendingPathComponent:path];
NSDictionary *attrDir = [[NSFileManager defaultManager]attributesOfItemAtPath:filesPath error:nil];
filesDirectory = [NSDictionary dictionaryWithObjectsAndKeys:filesSize, [attrDir objectForKey:NSFileSize],
filesName, (NSString *)directoryContent, filesType, [path pathExtension],
createdDate, [attrDir objectForKey:NSFileCreationDate],
modifiedDate, [attrDir objectForKey:NSFileModificationDate], nil];
NSLog(#"%#", filesDirectory);
}
}

Answer 4

#import <UIKit/UIKit.h>
#interface MyFilesList : UIViewController <UITableViewDelegate, UITableViewDataSource> {
NSMutableArray *directoryContent;
IBOutlet UITableView *filesTable;
IBOutlet NSNumber *filesSize;
IBOutlet NSString *filesName;
IBOutlet NSString *filesType;
IBOutlet NSString *filesPath;
IBOutlet NSDate *createdDate;
IBOutlet NSDate *modifiedDate;
NSMutableDictionary *filesDirectory;
}
#property (nonatomic, retain) NSMutableArray *directoryContent;
#property (nonatomic, retain) IBOutlet UITableView *filesTable;
#property (nonatomic, retain) IBOutlet NSNumber *filesSize;
#property (nonatomic, retain) IBOutlet NSString *filesName;
#property (nonatomic, retain) IBOutlet NSString *filesType;
#property (nonatomic, retain) IBOutlet NSString *filesPath;
#property (nonatomic, retain) IBOutlet NSDate *createdDate;
#property (nonatomic, retain) IBOutlet NSDate *modifiedDate;
#property (nonatomic, retain) NSMutableDictionary *filesDirectory;
- (void)listFiles;
- (void) willProcessPath;
#end