URLSessionConfiguration

Called on a session configuration before it’s used to instantiate an NSURLSession instance.

This should ONLY be called if the configuration is NOT the defaultSessionConfiguration.

Swift3:

let configuration = URLSessionConfiguration.ephemeral
configuration.addCaffeine()
let session = URLSession(configuration: configuration)
let request = URLRequest(URL: NSURL(string: "http://google.com")!)
_ = session.dataTask(with: request) { (data, res, err) -> Void in
print("I used Caffeine to get here")
}.resume()

Swift 2.3:

let configuration = NSURLSessionConfiguration.ephemeralSessionConfiguration()
configuration.addCaffeine()
let session = NSURLSession(configuration: configuration)
let request = NSMutableURLRequest(URL: NSURL(string: "http://google.com")!)
session.dataTaskWithRequest(request) { (data, res, err) -> Void in
print("I used Caffeine to get here")
}.resume()

Objective-C:

NSURLSessionConfiguration *config = [NSURLSessionConfiguration ephemeralSessionConfiguration];
[config addCaffeine];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
[session dataTaskWithURL:[NSURL URLWithString:@"http://google.com"] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"I used Caffeine to get here");
}];