Snackbar

Snackbar

Snackbars provide brief feedback about an operation through a message at the bottom of the screen. Snackbars contain up to two lines of text directly related to the operation performed. They may contain a text action, but no icons.

Material Design Specifications

• Snackbars

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Installation

Requirements

• Xcode 7.0 or higher.
• iOS SDK version 7.0 or higher.

Installation with CocoaPods

To add this component to your Xcode project using CocoaPods, add the following to your Podfile:

pod 'MaterialComponents/Snackbar'

Then, run the following command:

pod install

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Overview

Snackbar Manager and Message

Snackbar is comprised of two classes: MDCSnackbarManager and MDCSnackbarMessage. Snackbar messages contain text to be displayed to a user. Messages are passed to the manager. The manager decides when it is appropriate to show a message to the user.

Suspending and Resuming Display of Messages

Snackbar manager can be instructed to suspend and resume displaying messages as needed. When messages are suspended the manager provides a suspension token that the client must keep as long as messages are suspended. When the client releases the suspension token or calls the manager's resume method with the suspension token, then messages will resume being displayed.

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Usage

Displaying a snackbar requires using two classes: MDCSnackbarManager and MDCSnackbarMessage. First, create an instance of MDCSnackbarMessage and provide a string to display to the user. Next, pass the MDCSnackbarMessage to the MDCSnackbarManager with the static showMessage method. This will automatically construct an MDCSnackbarMessageView and appropriate overlay views so the snackbar is visible to the user.

Importing

Before using Snackbar, you'll need to import it:

Swift

import MaterialComponents.MaterialSnackbar

Objective-C

#import "MaterialSnackbar.h"

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Examples

Display a Snackbar Message

Swift

let message = MDCSnackbarMessage()
message.text = "The groundhog (Marmota monax) is also known as a woodchuck or whistlepig."
MDCSnackbarManager.show(message)

Objective-C

MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
message.text = @"How much wood would a woodchuck chuck if a woodchuck could chuck wood?";
[MDCSnackbarManager showMessage:message];

Display a Snackbar Message with an Action

Swift

let action = MDCSnackbarMessageAction()
let actionHandler = {() in
  let answerMessage = MDCSnackbarMessage()
  answerMessage.text = "Fascinating"
  MDCSnackbarManager.show(answerMessage)
}
action.handler = actionHandler
action.title = "OK"
message.action = action

Objective-C

MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
void (^actionHandler)() = ^() {
  MDCSnackbarMessage *answerMessage = [[MDCSnackbarMessage alloc] init];
  answerMessage.text = @"A lot";
  [MDCSnackbarManager showMessage:answerMessage];
};
action.handler = actionHandler;
action.title = @"Answer";
message.action = action;