The whole point of doing things asynchronously is you don't have to
care about waiting for one thing to do another thing, just set up two
NSURLConnections and start them going at the same time. So unless you
need some information from file 1 before starting on file 2
connection1 = [ [ NSURLConnection alloc ] initWithRequest:request1
delegate:self ];
connection2 = [ [ NSURLConnection alloc ] initWithRequest:request2
delegate:self ];
where connection1 and connection2 are instance variables of your
class. Then when you get the callbacks in your delegate just look to
see which connection they are for and deal with them appropriately.
When they are both finished downloading (and don't forget to release
the NSURLConnection(s) when they are) you start doing whatever else it
is you want to do.
Don't understand why you keep trying to go back to synchronous
downloads and you're talking about threads, who says NSURLConnection
uses threads at all. Apart from that, if you read the documentation
for NSURLConnection it tells you all delegate calls take place on the
thread you initiated the download on so, no, even if you did what you
suggested you'd just block the main thread with the download of file2.
On 01-Nov-2009, at 6:34 AM, DKJ wrote:
I've got a series of data files that my app needs to download before
the user can do anything. Because I want to have an activity
indicator spinning while the download is in progress, I have to do
asynchronous downloading. (Thanks to the list members who guided me
to that epiphany.) So I'm going to use the NSURLConnection class to
do the download.
Now I'm wondering if this will work: Suppose I want to download
file1 and file2. (Again, the user can do nothing until both files
are downloaded.) I use NSURLConnection to download file1. Then in
the connectionDidFinishLoading delegate method, I do a synchronous
download of file2, with something like stringWithContentsOfURL.
My idea is that the synchronous download of file2 would be taking
place in a separate thread from the one that started the
asynchronous download of file1. So, from the first thread's point of
view, file2 is being downloaded asynchronously too.
Am I on the right track here? If so, it sure would simplify
downloading all those files.
dkj
P.S. It's time for my semi-anual global "Thank You" to all those
list members who've responded to my queries over the last six months.
THANK YOU!
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/rols%40rols.org
This email sent to r...@rols.org
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
