Question

我在文档目录上有不同的文件夹，每个文件夹上都有图像。现在我想显示来自不同文件夹的一个图像。我已经尝试过了，但该程序在线上已经崩溃了。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
//I dont know what put here for display from sqlite

    NSUInteger row = [indexPath row];

    cell.textLabel.text = [array1 objectAtIndex:row];
    //cell.detailTextLabel.text = [array2 objectAtIndex:row];
NSString *b = [array2 objectAtIndex:row];
NSLog(@"b=%@",b);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,     NSUserDomainMask, YES);
NSLog(@"%@",paths);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSError *error = nil;
NSArray *imageFileNames = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",b]] error:&error];
NSLog(@"file=%@",imageFileNames);

NSMutableArray *images = [[NSMutableArray alloc ] init];


for (int i = 0; i < [imageFileNames count]; i++)
{
    NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:[NSString     stringWithFormat:@"%@/%d.png",b, i]];
    UIImage *img = [UIImage imageWithContentsOfFile:getImagePath];
    [images addObject:img];
    NSLog(@"%@",getImagePath);
 }
NSLog(@"images=%@",images);



cell.imageView.image=[imageFileNames objectAtIndex:0];
//NSLog(@"row=%u",row);




return cell;


}

Answer 1

我认为你所看到的是这样的（请根据自己的喜好修改）：

NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

self.contents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documents error:NULL];

...

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

cell.fileLabel.text = [self.contents objectAtIndex:indexPath.row];

//  Build Documents Path with Folder Name
NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *directory = [documents stringByAppendingPathComponent:[self.contents objectAtIndex:indexPath.row]];

NSFileManager *fM = [NSFileManager defaultManager];

//  Get Attributes
NSDictionary *fileAttributes = [fM attributesOfItemAtPath:directory error:NULL];

//  Check if it's a directory
if ([fileAttributes objectForKey:NSFileType] == NSFileTypeDirectory) {
    //  Get contents of directory
    NSArray *insideDirectory = [fM contentsOfDirectoryAtPath:directory error:NULL];

    cell.folderImageView.image = nil;
    //  Loop through folder contents
    for (NSString *file in insideDirectory) {
        if ([[[file pathExtension] uppercaseString] isEqualToString:@"PNG"]) {
            NSString *imagePath = [directory stringByAppendingPathComponent:file];
            UIImage *image = [UIImage imageWithContentsOfFile:imagePath];
            cell.imageView.image = image;
            break;
        }
    }
}

return cell;
}

Answer 2

您可以直接将[UIImage imageNamed:@""]用于图片而不是imageWithContentsOfFile

UITableView Cell上的图像

2 个答案: