iOS9 sendSynchronousRequest deprecated

Question

Warning:\'sendSynchronousRequest(_:returningResponse:)\' was deprecated in iOS 9.0: Use [NSURLSession dataTaskWithRequest:completionHandler:] (see NSURLSe

Answer 1

I wrote the following solution for the cases when you actually need for synchronous request which blocks the current thread execution. I use this code for migration from NSURLConnection to NSURLSession in the complex solution where it was quite a hassle to just change to async approach. With this solution the migration is just method name replacement.

NOTE: If you have a simple case, please use the accepted answer instead.

- (NSData *)sendSynchronousRequest:(NSURLRequest *)request returningResponse:(NSURLResponse **)response error:(NSError **)error
{

    NSError __block *err = NULL;
    NSData __block *data;
    BOOL __block reqProcessed = false;
    NSURLResponse __block *resp;

    [[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable _data, NSURLResponse * _Nullable _response, NSError * _Nullable _error) {
        resp = _response;
        err = _error;
        data = _data;
        reqProcessed = true;
    }] resume];

    while (!reqProcessed) {
        [NSThread sleepForTimeInterval:0.02];
    }
    if (response != nil)
        *response = resp;
    if (error != nil)
        *error = err;
    return data;
}

Usage (simple replace NSURLConnection to this method):

//NSData *data = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&resp error:&err];
NSData *data = [self sendSynchronousRequest:theRequest returningResponse:&resp error:&err];