从 Dropbox 加载数据时，iOS UITableView 不会显示任何内容

Question

我有一个 UITableView ，它应该在加载时显示 dropbox 中的文件夹的内容。我知道它通过使用日志语句从保管箱获取数据。从下拉框中获取数据后，我重新加载表中的数据，但它仍然没有显示任何内容。请帮忙

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    uploadFileButton = [[UIBarButtonItem alloc] initWithTitle:@"Upload" style:UIBarButtonItemStyleBordered target:self action:@selector(uploadFile:)];

    self.navigationItem.rightBarButtonItem = self.editButtonItem;
    self.navigationItem.leftBarButtonItem = uploadFileButton;
    self.title = @"DropBox";

    [[self restClient] loadMetadata:@"/"];
}

- (void)restClient:(DBRestClient*)client loadedMetadata:(DBMetadata*)metadata {

    for (DBMetadata *file in metadata.contents) {
        NSLog(@"\t%@", file.filename);
        [dropBoxArray addObject:file.filename];
    }
    NSLog(@"%@", dropBoxArray);

    [self.tableView reloadData];

    }
    - (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];
    }

    cell.textLabel.text = [dropBoxArray objectAtIndex:indexPath.row];
    NSLog(@"%@", cell.textLabel.text);

    return cell;
    }

Answer 1

您只需要在发出请求时显示 ProcessIndicator

- (void)viewDidLoad
{
    [super viewDidLoad];
    uploadFileButton = [[UIBarButtonItem alloc] initWithTitle:@"Upload" style:UIBarButtonItemStyleBordered target:self action:@selector(uploadFile:)];

    self.navigationItem.rightBarButtonItem = self.editButtonItem;
    self.navigationItem.leftBarButtonItem = uploadFileButton;
    self.title = @"DropBox";

    [[self restClient] loadMetadata:@"/"];
    [self showProcessIndicator]; //Your code for showing ProcessIndicator
}

并在调用此方法时隐藏即可。

- (void)restClient:(DBRestClient*)client loadedMetadata:(DBMetadata*)metadata {

    for (DBMetadata *file in metadata.contents) {
        NSLog(@"\t%@", file.filename);
        [dropBoxArray addObject:file.filename];
    }
    NSLog(@"%@", dropBoxArray);

    [self.tableView reloadData];
    [self hideProcessIndicator];
    }

这绝对能解决你的问题。
祝您编码愉快；）

Answer 2

没关系，我明白了。这是加载元数据的正确调用：

[[self restClient] loadMetadata:@""];