An Objective-C delegate is an object that has been assigned to the delegate property another object. To create one, you define a class that implements the delegate methods you’re interested in, and mark that class as implementing the delegate protocol. For example, suppose you have a UIWebView. If you’d like to implement its delegate’s webViewDidStartLoad: … Read more
It appears that you misunderstand how setTimeout() works. This tool called Loupe by Philip Roberts may help you understand. I’ve taken your code placed it into the tool which will allow you to visualise what is actually happening – link to Loupe When you use setTimeout, that function provided as the first parameter is delayed … Read more
What you should know about this this (aka “the context”) is a special keyword inside each function and its value only depends on how the function was called, not how/when/where it was defined. It is not affected by lexical scopes like other variables (except for arrow functions, see below). Here are some examples: function foo() … Read more