AppVersion Model

There are a variety of features that depends on app version:

As you might know, we can get app version from Bundle info dict:

There are several inconveniences in this approach:

1. We are forced to use if-let construction every time we need to get app version or use nil coalescing operator

2. Repeat boilerplate code: Bundle.main.infoDictionary?[“CFBundleShortVersionString”] as? String

3. Repeat boilerplate code to extract major / minor / patch components:

4. No ability to correctly compare two versions. Let’s see an example:

This is our improvement plan:

☐ get rid of meaningless if-let constructions or usage of nil coalescing operator

☐ get rid boilerplate code to get app version from Bundle’s userinfo

☐ get rid boilerplate code to extract major / minor / patch components

☐ add an ability to correctly compare two versions

Let’s try to fix all these minuses. First of all, we improve the standard Foundation Api:

First two items are completed:

☑ get rid of meaningless if-let constructions or usage of nil coalescing operator

☑ get rid boilerplate code to get app version from Bundle’s userinfo

Very good, let’s go further.

Now, we create an AppVersion model:

Next step is to make full implementation:

Next step is to make AppVersion comparable:

One more optional step is to make it Codable. In my case it is needed, but you can omit this.

Finally, we add two additional static properties to Bundle extension:

Besides, we can store the app version of the previous launch:

Let’s see the result:

All goals are achieved: 💪🏼

☑ get rid of meaningless if-let constructions or usage of nil coalescing operator

☑ get rid boilerplate code to get app version from Bundle’s userinfo

☑ get rid boilerplate code to extract major / minor / patch components

☑ add an ability to correctly compare two versions

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