[TableViewCell] Image with content of url

[dim971]

Hi everyone,

I'd like to know how can i load an image from an url into a tableviewcell ? I tried the following code :

NSURL *url = [NSURL URLWithString:@"http://xxx.xxx.xx/xx.png"]
NSData *imageData = [NSData dataWithContentsOfURL:url];
myCell.image = [UIImage alloc] imageWithData:imageData];

the thing is when i scroll the tableview, it's getting very slow, so i think that this is not the good way to show an image from an url...? if someone can help me pleaz...

thanks

[DevTeamOfOne]

It certainly is very expensive to use images in that way. You are also adding to the RAM by demaning the images be held by the OS. When they are referenced from WITHIN the app, they aren't held in ram till they are required. Here, when the table view is created, it references them immediately and takes mega RAM.

Make sense?

[dim971]

Originally Posted by DevTeamOfOne

It certainly is very expensive to use images in that way. You are also adding to the RAM by demaning the images be held by the OS. When they are referenced from WITHIN the app, they aren't held in ram till they are required. Here, when the table view is created, it references them immediately and takes mega RAM.

Make sense?

Okay, thank you :-)
so how can i display an image from an web url in a tablviewcell ?

[hijinks]

you can check out the following

UIImageView in a custom cell | Iphone Noob

There is also an entry to create a custom cell, but there is source there to look at.

I am doing it by subclassing uitableviewcell and then drawing a uiimageview on my custom cell

[dim971]

ok, thank you all, it works :-) but there's one thing i didn't quite understand : first i have a table view, then i put a custom view on the first header with an image view inside the view. The image is getting from a web url using [NSData dataWithContentOfURL:url]. When i do this, the scrolling of the table view is very slow (as DevTeamOfOne explain :-), but if i use a custom tableviewcell with the image setting with [NSData dataWithContentOfURL:url], the scrolling is normal...why ? (hope my explanation is clear enought :-)