Adding a progress bar to upload or download

When we have a large upload or download, we generally want to have a progress indicator that we can show to the users so that they have an idea of how much longer the upload or download will take. The MKNetworkKit makes showing a progress indicator incredibly easy.

In this recipe we will be adding a progress indicator that will show the progress of downloading a large file. We will be using the onDownloadProgressChanged: callback of the MKNetworkOperation class to track the progress of our download. If we want the progress indicator to work for an upload, we need to use the onUploadProgressChanged: callback.

Getting ready

This recipe is compatible with both iOS and OS X. We need to download the framework from https://github.com/MugunthKumar/MKNetworkKit and add it to our project. Additionally, we need to add the following four frameworks:

• ImageIO.framework

• Security.framework

• SystemConfiguration.framework

• CFNetwork.framework

How to do it…

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