By Kevin Languedoc
This booklet leads you thru the fundamental recommendations and new iOS 10 SDK and quick three programming language APIs to construct iPhone and iPad database pushed functions utilizing the defacto commonplace for facts garage for cellular apps, SQLite. Readers will know about SQL operations like determining, putting, updating and deleting info utilizing a variety of info kinds like textual content, numerical forms, photographs or even audio/video info. After operating via this publication, you are going to achieve a professional view of constructing iOS apps utilizing SQlite as an information garage utilizing Objective-C and fast. With construct iOS Database Apps with quick and SQLite additionally, you will achieve specialist wisdom on the best way to create databases at runtime, together with developing or enhancing indexes, triggers, tables, columns, and perspectives. The examples use time-tested code from operating purposes.
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Extra info for Build iOS Database Apps with Swift and SQLite
Next, I check to see if the database is still open and open it if necessary. Otherwise, I send the preparedStatement and query and sqlStatement and query respectively to the database engine for execution. Notice how the Swift string is converted to the char data type that is required by SQLite using the cStringUsingEncoding (NSUTF8StringEncoding) method of the String class. errmsg(db) to fromCString. The preparedStatement in SQLite is created by using the sqlite3_prepare_v2 function. Once the results are all retrieved, you need to call the sqlite3_finalize function that takes preparedStatement as an argument.
The MasterViewController will retain and display the databases in the app along with schema elements. The DetailViewController will include buttons to create and open databases and to create tables, views, indexes, and triggers. The ViewController will also provide an action to execute queries. A data-access class will handle the communication between the data model, which includes the SQLite database and a custom type as, and the ViewControllers. The Application UI In this section, I'll add UIButtons and connect them to the assigned view controller.
The last feature I want to touch on is the Main database. In SQLite you can attach many databases to the same connection or database file. When you create a new database file or connection, SQLite automatically adds a database to the file and calls it Main. You have the option to create additional databases in the same connection and you name these databases separately and attach them together using the ATTACH command. Likewise, you can remove these auxiliary databases using the DETACH command.
Build iOS Database Apps with Swift and SQLite by Kevin Languedoc