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Beginning Programming with iOS 11, Swift 4, and Xcode 9 - Alerts - raywenderlich.com

3,498 views · Published 2 November 2017 · 3:18 · Indexed 18 October 2026

Channel: Kodeco · 2017 · Education

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Learn how to make the app display a popup alert when you tap a button.

View the rest of the course here: 

https://videos.raywenderlich.com/courses/91-your-first-swift-4-ios-11-app/lessons/1

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In apps that run in versions of iOS prior to iOS 8, use the UIAlertView class to display an alert message to the user. An alert view functions similar to but differs in appearance from an action sheet (an instance of UIActionSheet).
SDK

Overview

UIAlertView is deprecated in iOS 8. (Note that UIAlertViewDelegate is also deprecated.) To create and manage alerts in iOS 8 and later, instead use UIAlertController with a preferredStyle of alert.

Using an Alert View

Use the properties and methods defined in this class to set the title, message, and delegate of an alert view and configure the buttons in apps that run in versions of iOS prior to iOS 8. You must set a delegate if you add custom buttons. The delegate should conform to the UIAlertViewDelegate protocol. Use the show() method to display an alert view after it is configured.

Subclassing Notes

The UIAlertView class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified.

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