{"id":4307,"uri":"rw://betamax/collections/96","name":"Saving Data in iOS","description":"

Find out where and how to save data in iOS! This course explores common methods for persisting user data, all from within Xcode Playgrounds.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:25.532Z","updated_at":"2020-08-09T22:30:23.245Z","duration":3782,"difficulty":"beginner","content_type":"collection","platform_id":3,"language_id":3,"editor_id":3,"group_id":null,"ordinal":null,"body":null,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":478.15,"labelled_as_new":false,"display_attributes":{"concepts_covered":"","intended_audience":""},"average_rating":null,"rating_count":0,"professional":false,"obfuscated_body":null,"to_param":"4307-saving-data-in-ios","released_versions_data":[{"id":5429634,"url":"5429634-saving-data-in-ios","description":"Swift 5.1, iOS 13, Xcode 11"},{"id":5429634,"url":"5429634-saving-data-in-ios","description":"Swift 5.1, iOS 13, Xcode 11"},{"id":6307,"url":"6307-saving-data-in-ios","description":"Swift 4, iOS 12, Xcode 10"},{"id":4307,"url":"4307-saving-data-in-ios","description":"Swift 4, iOS 11, Xcode 9"},{"id":3761,"url":"3761-saving-data-in-ios","description":"Swift 3, iOS 10, Xcode 8"},{"id":3425,"url":"3425-saving-data-in-ios","description":""}],"groups":[{"id":113,"uri":"rw://betamax/parts/29","content_id":4307,"ordinal":1,"name":"Files and Data","description":null,"created_at":"2018-05-03T17:09:25.973Z","updated_at":"2018-05-03T17:09:25.982Z","contents":[{"id":4355,"uri":"rw://betamax/videos/1171","name":"Introduction","description":"

What is Data, and what does it mean to save it? Find out this action-packed introductory video!

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":true,"created_at":"2018-05-03T17:09:25.996Z","updated_at":"2020-08-03T09:30:54.965Z","duration":201,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":1,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1474.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Introduction","duration_in_time":"3:21","identifier":"1171","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1171/20d6c0e6-5eeb-4331-8272-26655c1c44dd.png","released":true,"has_materials_url":false,"permission_tags":[]},{"id":4358,"uri":"rw://betamax/videos/1172","name":"Document Directory URL","description":"

The user's document folder is a great place to store data. Where is it located? The File Manager knows!

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.022Z","updated_at":"2020-08-02T20:35:15.808Z","duration":299,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":2,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1388.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Document Directory URL","duration_in_time":"4:59","identifier":"1172","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1172/eec2b543-0f75-4ff6-89d8-1f1f1df69256.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4364,"uri":"rw://betamax/videos/1173","name":"Paths","description":"

Find out what the difference is between a URL and a path, and learn how to create your own useful URLs.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.049Z","updated_at":"2020-08-06T22:30:16.650Z","duration":212,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":3,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":573.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Paths","duration_in_time":"3:32","identifier":"1173","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1173/faee4006-613b-4316-8cc0-107186efccd1.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4367,"uri":"rw://betamax/videos/1174","name":"Challenge: URLs","description":"

In this video you'll combine the two ways you've learned to create URLs. Stick around to the end for a handy tip!

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.080Z","updated_at":"2020-07-25T18:30:13.772Z","duration":99,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":4,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":367.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Challenge: URLs","duration_in_time":"1:39","identifier":"1174","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1174/31ac3c29-a74a-49d0-802d-467a3617ffc0.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4370,"uri":"rw://betamax/videos/1175","name":"Data","description":"

Save some data! Some Foundation Data! When you've got an array of bytes, you can store them with a Data.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":true,"created_at":"2018-05-03T17:09:26.109Z","updated_at":"2020-08-08T12:30:18.871Z","duration":242,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":5,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":472.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Data","duration_in_time":"4:02","identifier":"1175","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1175/645761cd-035e-477d-ad0e-df61d0654897.png","released":true,"has_materials_url":true,"permission_tags":[]},{"id":4372,"uri":"rw://betamax/videos/1176","name":"String","description":"

Convert between bytes, Data instances, and Strings. They're all easily interchangeable when your data bytes represent Strings using your expected encoding.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.134Z","updated_at":"2020-08-07T10:30:14.789Z","duration":170,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":6,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":383.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · String","duration_in_time":"2:50","identifier":"1176","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1176/2c9617ce-370c-43d1-8b2c-edef3e3e730b.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4375,"uri":"rw://betamax/videos/1177","name":"Challenge: String Data","description":"

Practice your saving and loading, after converting from String to Data.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.163Z","updated_at":"2020-08-01T02:30:22.363Z","duration":91,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":7,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":295.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Challenge: String Data","duration_in_time":"1:31","identifier":"1177","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1177/6dd10e30-e662-4ba7-bb98-47d1939e4468.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4377,"uri":"rw://betamax/videos/1178","name":"Copying Image Data","description":"

Images contain a whole lot of data. Let's practice saving it to locations that are more suitable for your app's needs.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.197Z","updated_at":"2020-08-08T15:30:18.657Z","duration":372,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":8,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":403.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Copying Image Data","duration_in_time":"6:12","identifier":"1178","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1178/4d7f8bec-72ff-4f11-9029-9c7549798b57.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4381,"uri":"rw://betamax/videos/1179","name":"Challenge: Loading Image Data","description":"

Write a method to make it easy to retrieve the PNGs that you've saved in your document directory.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.219Z","updated_at":"2020-07-30T17:30:29.019Z","duration":142,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":9,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":311.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Challenge: Loading Image Data","duration_in_time":"2:22","identifier":"1179","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1179/d28bbdba-3acc-485f-93fe-4ee553b5d101.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4384,"uri":"rw://betamax/videos/1180","name":"Conclusion","description":"

Quickly review what core concepts should feel solid by this point. We'll go over what they'll prepare you for, in the next section.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.236Z","updated_at":"2020-07-27T09:30:21.147Z","duration":44,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":113,"ordinal":10,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":199.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Conclusion","duration_in_time":"0:44","identifier":"1180","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1180/94447003-9c90-4391-b278-5b0362a5df09.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]},{"id":116,"uri":"rw://betamax/parts/30","content_id":4307,"ordinal":2,"name":"JSON and Property Lists","description":null,"created_at":"2018-05-03T17:09:26.309Z","updated_at":"2018-05-03T17:09:26.320Z","contents":[{"id":4393,"uri":"rw://betamax/videos/1181","name":"Introduction","description":"

If the previous section was handy for you, this one probably will be as well! This introductory video will let you know how we'll be building on what you learned there.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.332Z","updated_at":"2020-08-02T16:36:20.308Z","duration":59,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":11,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":332.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Introduction","duration_in_time":"0:59","identifier":"1181","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1181/eac9b4b0-2ee4-4e01-a92e-f9718d20cfc5.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4396,"uri":"rw://betamax/videos/1182","name":"Codable Types","description":"

Create your own Codable type, suitable for use with JSON and Property Lists.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.351Z","updated_at":"2020-08-03T06:30:35.879Z","duration":359,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":12,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":469.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Codable Types","duration_in_time":"5:59","identifier":"1182","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1182/9b00c661-06e3-4140-b12b-7ee1c717009f.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4398,"uri":"rw://betamax/videos/1183","name":"JSON","description":"

Learn what JSON is, so you'll know what to expect when you use it to save your Encodable types.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.378Z","updated_at":"2020-08-02T07:30:19.751Z","duration":137,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":13,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":276.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · JSON","duration_in_time":"2:17","identifier":"1183","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1183/cf6f506c-fce3-4981-b876-c7159fcb051d.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4400,"uri":"rw://betamax/videos/1184","name":"JSON Demo","description":"

Now you can save an instance of your type, using JSON. Let's see how the JSON representation differs from Swift, before we load it back.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":true,"created_at":"2018-05-03T17:09:26.399Z","updated_at":"2020-08-09T22:30:22.788Z","duration":286,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":14,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":1052.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · JSON Demo","duration_in_time":"4:46","identifier":"1184","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1184/d462d43a-b450-464d-987c-2a7d617dce0b.png","released":true,"has_materials_url":true,"permission_tags":[]},{"id":4403,"uri":"rw://betamax/videos/1185","name":"Challenge: JSON Arrays","description":"

Create a Codable array, and see if you can save and load it the same way you can with individual instances.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.416Z","updated_at":"2020-07-25T07:30:16.021Z","duration":154,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":15,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":267.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Challenge: JSON Arrays","duration_in_time":"2:34","identifier":"1185","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1185/3b6f5dd2-9be3-466a-b751-d451bfabf832.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4406,"uri":"rw://betamax/videos/1186","name":"Codable Hierarchies","description":"

You're sure to build up complex hierarchies of structs, classes, and enums, in your coding journey. Codable's got you covered!

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.435Z","updated_at":"2020-08-03T01:30:36.277Z","duration":325,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":16,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":363.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Codable Hierarchies","duration_in_time":"5:25","identifier":"1186","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1186/89fdecdb-e530-4e5d-8585-7351bc1f31e4.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4409,"uri":"rw://betamax/videos/1187","name":"Challenge: Property Lists","description":"

Let's get a taste of working with Property Lists before we dive into what they're made of, in the next video.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.454Z","updated_at":"2020-07-30T22:30:42.507Z","duration":288,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":17,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":225.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Challenge: Property Lists","duration_in_time":"4:48","identifier":"1187","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1187/3bc1799e-dfa9-4b5f-ac68-a1f8fbb2c929.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4411,"uri":"rw://betamax/videos/1188","name":"Property List Anatomy","description":"

Learn what makes up a Property List. Employ your knowledge of JSON to be able to understand how the formats differ.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.474Z","updated_at":"2020-08-01T20:31:27.227Z","duration":89,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":18,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":257.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Property List Anatomy","duration_in_time":"1:29","identifier":"1188","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1188/45e4ef25-7c3e-43d1-b4b3-5d6277d2cf5e.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]},{"id":4412,"uri":"rw://betamax/videos/1189","name":"Comparing Property Lists and JSON","description":"

Examine the files you stored in the Property List challenge. Also, learn about a few encoding options and how they affect what you can save.

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.567Z","updated_at":"2020-08-07T16:30:17.670Z","duration":244,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":19,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":223.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Comparing Property Lists and JSON","duration_in_time":"4:04","identifier":"1189","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1189/c9062aa3-5802-421c-9a66-4bb23aab3faf.png","released":true,"has_materials_url":true,"permission_tags":["stream-beginner-videos"]},{"id":4413,"uri":"rw://betamax/videos/1190","name":"Conclusion","description":"

Review everything you've learned in this section, and find out where your data saving journey might yet take you!

","released_at":"2017-10-10T13:00:00.000Z","searchable":true,"free":false,"created_at":"2018-05-03T17:09:26.593Z","updated_at":"2020-07-23T12:30:26.168Z","duration":111,"difficulty":"beginner","content_type":"episode","platform_id":3,"language_id":3,"editor_id":3,"group_id":116,"ordinal":20,"warnings":["missing_editorial_team"],"related_content_id":null,"popularity":234.0,"labelled_as_new":false,"average_rating":null,"rating_count":0,"professional":false,"episode_title_with_course":"Saving Data in iOS · Conclusion","duration_in_time":"1:51","identifier":"1190","video_banner_url":"https://files.betamax.raywenderlich.com/attachments/videos/1190/6179632f-d049-497b-9c78-194cce18a113.png","released":true,"has_materials_url":false,"permission_tags":["stream-beginner-videos"]}]}]}

Get immediate access to all our expert-led videos with a raywenderlich.com subscription!