material-components_material-components-ios/components/Snackbar/examples/SnackbarSimpleExample.m

// Copyright 2016-present the Material Components for iOS authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#import <UIKit/UIKit.h>

#import "MaterialPalettes.h"
#import "MaterialSnackbar.h"
#import "supplemental/SnackbarExampleSupplemental.h"

@implementation SnackbarSimpleExample {
  BOOL _legacyMode;
  BOOL _dynamicType;
}

- (void)viewDidLoad {
  [super viewDidLoad];
  [self setupExampleViews:@[
      @"Simple Snackbar",
      @"Snackbar with Action Button",
      @"Snackbar with Long Text",
      @"Attributed Text Example",
      @"Color Themed Snackbar",
      @"Customize Font Example",
      @"De-Customize Example"
  ]];
  self.title = @"Snackbar";
  _legacyMode = YES;
  _dynamicType = NO;
  self.navigationItem.rightBarButtonItems =
      @[[[UIBarButtonItem alloc] initWithTitle:@"Legacy"
                                         style:UIBarButtonItemStylePlain
                                        target:self
                                        action:@selector(toggleModes)],
        [[UIBarButtonItem alloc] initWithTitle:@"DT Off"
                                         style:UIBarButtonItemStylePlain
                                        target:self
                                        action:@selector(toggleDynamicType)]];
  MDCSnackbarManager.delegate = self;
}

- (void)toggleModes {
  _legacyMode = !_legacyMode;
  if (_legacyMode) {
    [self.navigationItem.rightBarButtonItems.firstObject setTitle:@"Legacy"];
  } else {
    [self.navigationItem.rightBarButtonItems.firstObject setTitle:@"New"];
  }
  MDCSnackbarMessage.usesLegacySnackbar = _legacyMode;
}

- (void)toggleDynamicType {
  _dynamicType = !_dynamicType;
  if (_dynamicType) {
    [self.navigationItem.rightBarButtonItems.lastObject setTitle:@"DT On"];
  } else {
    [self.navigationItem.rightBarButtonItems.lastObject setTitle:@"DT Off"];
  }
  [MDCSnackbarManager mdc_setAdjustsFontForContentSizeCategory:_dynamicType];
}

#pragma mark - Event Handling

- (void)showSimpleSnackbar:(id)sender {
  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"Snackbar Message";
  [MDCSnackbarManager showMessage:message];
}

- (void)showSnackbarWithAction:(id)sender {
  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"Snackbar Message";
  MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
  action.title = @"Tap Me";
  message.action = action;
  [MDCSnackbarManager showMessage:message];
}


- (void)showLongSnackbarMessage:(id)sender {
  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"A red flair silhouetted the jagged edge of a sublime wing.";
  MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
  MDCSnackbarMessageActionHandler actionHandler = ^() {
    MDCSnackbarMessage *answerMessage = [[MDCSnackbarMessage alloc] init];
    answerMessage.text = @"The sky was cloudless and of a deep dark blue.";
    [MDCSnackbarManager showMessage:answerMessage];
  };
  action.handler = actionHandler;
  action.title = @"Action";
  message.action = action;

  [MDCSnackbarManager showMessage:message];
}


- (void)showBoldSnackbar:(id)sender {
  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  NSMutableAttributedString *text = [[NSMutableAttributedString alloc] init];
  [text appendAttributedString:[[NSAttributedString alloc]
                                initWithString:@"Boldly"
                                attributes:@{
                                             MDCSnackbarMessageBoldAttributeName : @YES
                                             }]];
  [text appendAttributedString:[[NSAttributedString alloc]
                                initWithString:@" go where no one has gone before."]];
  message.attributedText = text;

  [MDCSnackbarManager showMessage:message];
}

- (void)showColorThemedSnackbar:(id)sender {
  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"Snackbar Message";
  MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
  action.title = @"Tap Me";
  message.action = action;
  [MDCSnackbarManager setButtonTitleColor:MDCPalette.purplePalette.tint400
                                 forState:UIControlStateNormal];
  [MDCSnackbarManager setButtonTitleColor:MDCPalette.purplePalette.tint700
                                 forState:UIControlStateHighlighted];
  MDCSnackbarManager.messageTextColor = MDCPalette.greenPalette.tint500;
  [MDCSnackbarManager showMessage:message];
}

- (void)showCustomizedSnackbar:(id)sender {
  UIFont *customMessageFont = [UIFont fontWithName:@"Zapfino" size:14.0f];
  NSAssert(customMessageFont, @"Unable to instantiate font");
  MDCSnackbarManager.messageFont = customMessageFont;

  UIFont *customButtonFont = [UIFont fontWithName:@"ChalkDuster" size:14.0f];
  NSAssert(customButtonFont, @"Unable to instantiate font");
  MDCSnackbarManager.buttonFont = customButtonFont;

  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"Customized Fonts";
  MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
  action.title = @"Fancy";
  message.action = action;

  [MDCSnackbarManager showMessage:message];
}

- (void)showDecustomizedSnackbar:(id)sender {
  MDCSnackbarManager.messageFont = nil;
  MDCSnackbarManager.buttonFont = nil;
  [MDCSnackbarManager setButtonTitleColor:nil forState:UIControlStateNormal];
  [MDCSnackbarManager setButtonTitleColor:nil forState:UIControlStateHighlighted];
  MDCSnackbarManager.messageTextColor = nil;

  MDCSnackbarMessage *message = [[MDCSnackbarMessage alloc] init];
  message.text = @"Back to the standard snackbar";
  MDCSnackbarMessageAction *action = [[MDCSnackbarMessageAction alloc] init];
  action.title = @"Okay";
  message.action = action;

  [MDCSnackbarManager showMessage:message];
}

#pragma mark - UICollectionView

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
  switch (indexPath.row) {
    case 0:
      [self showSimpleSnackbar:nil];
      break;
    case 1:
      [self showSnackbarWithAction:nil];
      break;
    case 2:
      [self showLongSnackbarMessage:nil];
      break;
    case 3:
      [self showBoldSnackbar:nil];
      break;
    case 4:
      [self showColorThemedSnackbar:nil];
      break;
    case 5:
      [self showCustomizedSnackbar:nil];
      break;
    case 6:
      [self showDecustomizedSnackbar:nil];
      break;
    default:
      break;
  }
}

- (void)willPresentSnackbarWithMessageView:(nullable MDCSnackbarMessageView *)messageView {
  NSLog(@"A snackbar will be presented");
}

@end