Question

我正在为基于Drupal的网站构建应用程序。我目前有我的iOS应用程序从MySQL数据库中提取数据（例如文章标题和描述）。有谁知道我会用什么样的代码在UIImageView中显示文章的相应图像（通过Drupal字段上传）？

以下是我用来从Drupal网站提取文本的代码的快速摘录。

DoctorsViewController.h

@interface DoctorsViewController : UIViewController {

    IBOutlet UITableView *DoctorsTableView;

    NSArray *Doctors;
    NSMutableData *data;

}

DoctorsViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.


[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:@"MY URL HERE"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];
[[NSURLConnection alloc] initWithRequest:request delegate:self];

// Do any additional setup after loading the view, typically from a nib.
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    data = [[NSMutableData alloc] init];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData
{
    [data appendData:theData];

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;

    Doctors = [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];
    [DoctorsTableView reloadData];

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    UIAlertView *errorView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"The download could not complete - please make sure that you're connected to 3G or Wi-Fi." delegate:nil
                                              cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
    [errorView show];
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;


}
- (int)numberOfSectionsInTableView: (UITableView *)tableview

{
    return 1;

}

- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [Doctors count];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *DoctorsTableIdentifier = @"DoctorsCell";

    DoctorsCell *cell = (DoctorsCell *)[tableView dequeueReusableCellWithIdentifier:DoctorsTableIdentifier];
    if (cell == nil) 
    {
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DoctorsCell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
    } 

    cell.firstnameLabel.text = [[Doctors objectAtIndex:indexPath.row] objectForKey:@"node_title"];

    cell.descriptionLabel.text = [[Doctors objectAtIndex:indexPath.row] objectForKey:@"Opening Paragraph"];


    return cell;

}

Answer 1

这并不像听起来那么简单 - Drupal以非常特定的方式存储其字段数据，并且图像的URI使用模式而不是具有相对或绝对路径来寻址（例如public：// path / to / image.jpg而不是/sites/default/files/path/to/image.jpg）

您可以直接从DB获取节点的图像URI（假设您的文章类型使用标准的field_image字段）：

SELECT fm.uri
FROM {file_managed} fm
INNER JOIN field_data_field_image fi ON fi.entity_type = 'node' AND fi.bundle = 'article' AND fi.deleted = 0 AND fi.field_image_fid = fm.fid
WHERE fi.entity_id = <nid>

其中<nid>是节点ID。从那里开始，您需要执行将路径转换为适用于iOS应用程序的所需逻辑。 Drupal使用file_create_url()执行相同的任务，因此这是您获得灵感的最佳起点。根据您的设置，您只需在public://到http://example.com/sites/default/files/上执行字符串替换即可。

从长远来看，您可能希望在应用中添加Services module并使用REST API，而不是直接查询数据库。这需要很多准备Drupal数据的压力，所以你可以只处理你需要的东西。

如何将图像从Drupal字段加载到UIImageView？

1 个答案: