UIScrollView: Activity Indicator while loading image from url.

Question

Hi,

I need and Activity indicator spinning in a modal Modal view that has an UIScrollView while the content of the ScrollView(image from url) is loading.

Any ideas of how to get this done?

As a plus I need to know how to tell the ScrollView to behaves like the Photos Iphone Native App, I mean, load an image, adjust it to fit the screen without loosing aspect ratio.

Thanx!!!! have everybody a nice day

Answer 1

You need to use two steps:

• First, download the image and display the activity indicator
• When done, display the image and remove the activity indicator

The tricky part is it probably won't work if you just use NSData's initWithContentsOfURL: because it is a blocking call. On the Mac you can use NSURLDownload to download content asynchronously, you should check if this is available on the iPhone SDK.

For using a UIScrollView to display an image and fitting it to the screen at first, you should check the ScrollViewSuite sample code. It does exactly what you are looking for.