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Threads, tasks, and the Objective-C SDK
Having completed an Android version of my app, I was hoping that the Objective-C version for iOS would be similar. But looking at the DBRoulette example, there seems to be a big difference regarding...
OK, I figured out how to make the API calls blocking. Here is my worker thread function, processWithRecursion (in pseudo-code):
processWithRecursion( currentDirectory )
{
set waiting = YES; //..a volatile, atomic variable
call listFolder: currentDirectory, with completion block:
{
get list of entries;
set waiting = NO;
}
do forever
{
sleep 80 milliseconds
if( not waiting ) break;
if( threadMustStop ) return; //..set by "Cancel" button
}
for each element in that list, do:
{
if(element is a directory)
{
create local destination directory of that name
processWithRecursion(currentDirectory + subdirectory name);
}
else //..element is a file
{
set waiting = YES;
call downloadData: elementPathName, with completion block
{
get the data downloaded and write to local file
set waiting = NO;
}
do forever
{
sleep 80 milliseconds
if( not waiting ) break;
if( threadMustStop ) return;
}
}
}
}
Is this an advisable way to the SDK to download an entire directory?
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