iPhone - 文件列表的属性

Question

我有一个 mutableArray，它在 tableView 中显示文件列表。我已将这些文件存储在一个目录中。

我正在使用 NSfileManager 类和 attributesOfItemAtPath 方法来检索文件的一些属性，例如 fileSize、fileType..

在第二阶段，我尝试拥有一个显示详细信息的控制器在 tableView 中触摸时特定文件的属性。

问题是我不知道如何将 fileSize 和 fileType 等属性分别绑定到 NSDictionary 并使其显示在该特定文件的详细视图中。

这是我用于列出文件和属性的源代码。

- (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];
    }
}

请帮助我继续下一步..提前致谢..

Answer 1

尝试这样的事情：

- (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

为什么不创建一个具有以下属性的“FileDescriptor”类：

NSString *fileName;
NSString *fileSize;
NSString *fileType;
NSDate *createdDate;
NSDate *modifiedDate;

在遍历目录时，为每个文件创建此类的一个实例，并将其存储在数组（或字典，如果您愿意）中。然后，您可以使用该数组

a) 为 UITableViewCells 提供数据

b) 单击单元格时显示每个文件的详细视图。

如果你想使用字典（我认为这不太“干净”），你可以这样做：

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