Use a delegate if you want to talk to only one object. For example, a tableView has a delegate – only one object should be responsible for dealing with it. Use notifications if you want to tell everyone that something has happened. For example in low memory situations a notification is sent telling your app … Read more
I don’t know if you are still looking for an answer to this, but the way to do it is to remove the function from the protocol definition, cast your object to Foo and then call the method on it: protocol Foo { // func testPrint() <- comment this out or remove it } extension … Read more
I think you can get there by adding an (empty) extension to UIViewController and then specifying your detailViewController attribute using a composed protocol of the empty extension and your DetailViewController. Like this: protocol UIViewControllerInject {} extension UIViewController : UIViewControllerInject {} Now all subclasses of UIViewController satisfy protocol UIViewControllerInject. Then with that, simply: typealias DetailViewControllerComposed = … Read more
The datasource supplies the data, the delegate supplies the behavior. In MVC, datasource is in the model layer and the delegate is in the control layer. Actually, on second thought, the datasource is usually controller that is lower down, closer to the model. I don’t think I’ve ever used a model object as my datasource.
Starting a URL with // means “Use a different server but keep the same scheme” So if you load //example.net/script from https://example.com/ it will get https://example.net/script, while if you load it from http://example.com/ it will get http://example.net/script. If, on the other hand, you load it from file://c:/Users/You/Documents/test.html then it will probably not resolve to anything … Read more
You are making this harder than it should be. Please follow the below steps and make sure the shared folder you are creating has write access for this user you are using. download the jar file http://jcifs.samba.org/ (there is only one jar file) copy and paste the below code with your information for user name, … Read more
The rule of thumb here is how many clients would like to be notified of an event. If it’s mainly one object (e.g. to dismiss a view or to act upon a button clicked, or to react to a failed download) then you should use the delegate model. If the event you emit may be … Read more
Delegates send messages to you. For example: if you use the accelerometer delegate, you will get messages about the accelerometer. If you use that new neutrino-detection delegate, you will get messages about any neutrinos detected in the area. If you use PopUps, PopUps send you messages. And the way that is done, is with the … Read more
A protocol, declared with the (@protocol syntax in Objective-C) is used to declare a set of methods that a class “adopts” (declares that it will use this protocol) will implement. This means that you can specify in your code that, “you don’t care which class is used as long as it implements a particular protocol”. … Read more
I would use HDLC. I have had good luck with it in the past. I would for a point to point serial just use the Asynchronous framing and forget about all of the other control stuff as it would probably be overkill. In addition to using HDLC for the framing of the packet. I format … Read more