Updating core data database

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In the later tutorials, we’ll talk about object relationship and show you how to optimize the app using NSFetched Results Controller.

for the Entity you are looking to update, in my example that would be "Alert".

As your app gains more customers and becomes more feature-rich, you may find yourself with new problems to solve.

Core Data is a powerful tool that has changed a lot over the years.

In the last tutorial, we already discussed how to fetch and save a managed object using Core Data API.

So how can you update or delete an existing managed object from database? To allow user to delete a record from the table view, as you know, we can simply implement the “can Edit Row At Index Path” and “commit Editing Style” methods.

To be very clear, Core Data is not a database it is just a framework built around SQLite so that models or Data in the applications can be managed. // import UIKit import Core Data class Add Update View Controller: UIView Controller, UIImage Picker Controller Delegate, UINavigation Controller Delegate, UIGesture Recognizer Delegate, UIText Field Delegate 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 // // View Controller.swift // User Details // // Created by Chandra Rao on 06/12/17.

However, we only showed you how to insert records into data store through Core Data API and left out the update & delete operations.If there is no selected device, we’ll then create a new device and add it into the database. The update feature should now work properly: Thanks to Core Data.Even without learning SQL and database, you’re able to perform create, select, update and delete operation.We hope you enjoy the tutorial and have a better understanding about Core Data.For your reference, you can download the complete source code here.

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