Need help Updating Images whilst app is running?

Hi,

I am building an application in xcode with applescript and obj-c. It basically trawls through lots of links looking for specific images, the whole process takes about a minute but the images don't update till the very end.

How would I go about changing this so that the images updated as soon as they were found?

Any help would be appreciated! A sample of my code is pasted below...

try

set imageurl to ("http://static.guim.co.uk/sys-images/Technology/Pix/pictures/2012/8/8/13444203329 67/Google-basketball-008.jpg")

set theURL to current application's NSURL's URLWithString_(imageURL)

set theImage to current application's NSImage's alloc's initWithContentsOfURL_(theURL)

theImage's setSize_({50, 50})

swatch_preview's setImage_(theImage)

end try

Thanks,

Mark