want to extrac image from string url

Question

I have the following image xml tag in which image path is stored

NSString *imgstring =[[blogEntries objectAtIndex: blogEntryIndex1] objectForKey: @"image"];

now i want to display this image in UITAble cell by following method

cell.textLabel.text=imgstring;

i am just getting path on the cell not actual image how should i display image

Answer 1

Hi.

Of course you're getting text displayed - you're setting the text property of a UILabel to a string :) How would it know you wanted it to display an image?

You want something like

cell.imageView.image = [UIImage imageNamed:imgstring];

Have a look at the UITableViewCell documentation for more details

However, this will only work for images in your project - for external images you will have to do a little more work.

NSString *imgstring =[[blogEntries objectAtIndex: blogEntryIndex1] objectForKey: @"image"];
NSURL *url = [NSURL URLWithString:imgstring];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *img = [[UIImage alloc] initWithData:data];

However, this will block your app until the image is loaded. Instead you might need to load the images is the background :

    // Tell your code to load the image for a cell in the background
    NSString *imgstring =[[blogEntries objectAtIndex: blogEntryIndex1] objectForKey: @"image"];
    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:cell, @"cell", imgstring, @"imgstring", nil];
    [self performSelectorInBackground:@selector(loadImage:) withObject:dict];

- (void) loadImage:(id)object {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    // Get the data to pass in
    NSDictionary *dict = (NSDictionary *)object;

    // Get the cell and the image string
    NSString *imgstring = [dict objectForKey:@"imgstring"];
    UITableViewCell *cell = [dict objectForKey:@"cell"];

    NSURL *url = [NSURL URLWithString:imgstring];
    NSData *data = [NSData dataWithContentsOfURL:url];
    UIImage *img = [[UIImage alloc] initWithData:data];

    [pool release];
}

But you're going to run into threading problems if you're not careful with this :)

If you get any other problems, post another comment and I'll try to help!

PS I've not tested this code, just typed it straight in so there might be typos, sorry!