HTTPS is HTTP (HyperText Transfer Protocol) plus SSL (Secure Socket Layer). You need a certificate to use any protocol that uses SSL. SSL allows arbitrary protocols to be communicated securely. It enables clients to (a) verify that they are indeed communicating with the server they expect and not a man-in-the-middle and (b) encrypt the network … Read more
respondsToSelector: is part of the NSObject protocol. Including NSObject in MyProtocol should solve your problem: @protocol MyProtocol <NSObject> @optional -(void)optionalProtocolMethod:(id)anObject; @end
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
You cannot forward declare a superclass or a protocol that it conforms to. In those cases, you must include the header. This is because (in the case of superclass) the superclass’s instance variables and methods become part of your class; or (in the case of protocols) the protocol’s methods become methods declared in your class, … Read more
http:// has a serious overhead, especially when dealing with thousands of small files. I used svn for a website that had around 50,000 icons, all saved in SVN. With HTTP, it took around 20 minutes to checkout. Once I switched to svn://, it took less than a minute. This is because with HTTP it’s one … Read more
The inclusion of the “http:” or “https:” part is partly just a matter of tradition, partly a matter of actually specifying the protocol. If it is defaulted, the protocol of the current page is used; e.g., //www.example.com becomes http://www.example.com or https://www.example.com depending on the URL of the referring page. If a web page is saved … Read more
Let me reduce the sample even further, and label the lines: VC1.h #import “VC2.h” // A @class VC1; @protocol VC1Delegate // B @end @interface VC1 : UIViewController <VC2Delegate> // C @end VC2.h #import “VC1.h” // D @class VC2; @protocol VC2Delegate // E @end @interface VC2 : UIViewController <VC1Delegate> // F @end Consider what happens when … Read more
[Update: Aug 2017. Adapted to the full Go rewrite of protoc-gen-bug, currently 1.0.0-rc] The protoc-doc-gen, created by @estan (see also his earlier answer) provides a good and easy way to generate your documentation in html, json, markdown, pdf and other formats. There are number of additional things that I should mention: estan is no longer … Read more
The underlying reason for the limitation is that Swift doesn’t have first-class metatypes. The simplest example is that this doesn’t work: func isEmpty(xs: Array) -> Bool { return xs.count == 0 } In theory, this code could work, and if it did there would be a lot of other types I could make (like Functor … 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