![]() ![]() First, you’ll need a Client ID from Imgur to use their API and second, you’ll need to set up an App Group. There are a couple things you need to do to get it running. With the app overview out of the way, we can now set it up. To make things simple we’ll use Imgur for this as it allows users to upload images anonymously (without the images being linked to an account). We are going to build a Share extension that shares photos to a social networking site. Any custom application that presents an instance of the UIActivityViewController class will be able to see your sharing extension if you built your extension so that it can handle the file type provided by that application. This isn’t limited to system applications. ![]() With share extensions, users will now be able to share content to your service direct from within the app they are using, be it Safari, Photos or other apps. Previously, sharing content usually entailed switching from one app to another, for example, while surfing in Safari, if you wanted to share a URL, you would copy it, switch to the app you wanted to save or share it in, perform the action and then resume surfing in Safari. Share extensions, introduced in iOS 8, give users an easy and convenient way to share content with other entities, such as social sharing websites or upload services. I borrow the name from Anonymous function.IOS Building a Simple Share Extension in iOS 8 App You can also use a declaration to extend the behavior of an existing named type and to import symbols into your program that are declared elsewhere. For example, you use declarations to introduce functions and methods, to introduce variables and constants, and to define enumeration, structure, class, and protocol types. This is the thing that you have to consider when adopting a type alias.Ī declaration introduces a new name or construct into your program. But if you use the new type many places in your code, the benefit might outweigh the overhead. This might cause unnecessary overhead and confusion. It gives you the ability to give a nickname or synonym to an existing type, giving a more meaningful name to convey a clearer message to the reader.Įveryone has to check out for a definition of the type when they first encounter the type. ConclusionĪ type alias is a powerful tool. Sponsor and reach thousands of iOS developers. You can easily support by checking out this sponsor. Here is another example where I provide concrete types for all of the generic parameters. The later function might leave you wondering what argument the method expects it can be seconds, minutes, or hours. You can tell at a glance that the first one expected a number of seconds. This gives more context to our methods and code.Ĭompare these two identical methods. Based on the comment, we know that the double represents the number of seconds. TimeInterval gives more context to the type Double. In Foundation, it declares a TimeInterval type alias for a type Double. Let's take a look at the TimeInterval type. We use this to give a more meaningful name to convey a clearer message to the reader. ![]() They simply allow a name to refer to an existing type. We use typealias to introduce a new semantic type out of the existing one. We can assign Int to the new i type without any problem. Here is an example of declaring a type alias of Int as i. Since typealias is just a nickname of the existing type, you can use it interchangeably everywhere in your app. Type alias declarations are declared using the typealias keyword and have the following form: typealias name = existing type ![]()
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