[TextFields] Add check for placeholder before adding to the accessibility strings spoken by voice over.
Also added changed example to remove the floating label so that we can check that voice over correctly verbalizes only the visible text.
Before and After zip:
[BeforeAfterVideos.zip](https://github.com/material-components/material-components-ios/files/3843558/BeforeAfterVideos.zip)
QA=Notice that "state" is verbalized when it is not visible on screen in the after.
more info at #7513
We need to add @objc annotations to colorScheme and typographyScheme instances in our Swift examples, because we moved to Swift 4.2, the respondsToSelector won't find `setColorScheme:` and `setTypographyScheme:` setters otherwise.
This is a follow up PR for #7166 adds @objc annotations to Swift catalogMetadata() methods, because the Swift 4 compiler no longer attempts to infer what methods should be visible to Objective-C. As a result of this change in the compiler, no Swift examples were showing up in Dragons after #7166. See this article: https://useyourloaf.com/blog/objc-warnings-upgrading-to-swift-4/ for additional context.
Removes the need to copy-paste stanzas from other files anymore as we'll rely on #4478 to generate the correct stanza for us instead.
This was an automated change generated by running a find-and-replace regular expression:
```
/\*
Copyright ([0-9]+)-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\.
\*/
```
```
/\*
Copyright ([0-9]+)-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\.
\*/
```
```
/\*
Copyright ([0-9]+)-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\.
\*/
```
```
// Copyright $1-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.
```
Many of our Swift examples are either missing imports or are importing all of
MaterialComponents. Both of these will cause failures during internal builds.
* Add setHelperText:helperAccessibilityLabel
* Add nullability annotations
* Do not copy helperText param in -setHelperText:
* Update filled text field example
Made colorScheme and typographyScheme properties in the class interfaces for all our examples.
Moved theming away from example inits and into viewDidLoad
Small update for slider example to allow it to grab the theming properly.
Related Pivotal: https://www.pivotaltracker.com/story/show/156616695
* Adding Color Themer for Textfields.
* We have to keep the old API around, and deprecated after releasing the new version.
* fixing indentions.
* Importing the needed headers instead of forward declaration, documenting the deprecation and suggested methods to use.
* Filled text field example is updated to style the textfield with the semantic color scheme.
TextFieldColorThemer should be able to theme any MDCTextInput.
* fixed couple of method name change updates.
* Adding Color Themer for Textfields.
* We have to keep the old API around, and deprecated after releasing the new version.
* fixing indentions.
* Importing the needed headers instead of forward declaration, documenting the deprecation and suggested methods to use.
* Filled text field example is updated to style the textfield with the semantic color scheme.
TextFieldColorThemer should be able to theme any MDCTextInput.
* fixed couple of method name change updates.
* Revert "fixed couple of method name change updates."
This reverts commit 9e0ef0f2eb08026e05b1f182aab6b4dc84fa766b.
* Revert "Revert "fixed couple of method name change updates.""
This reverts commit bda6b13ff979811bd1eccc6ef365dd273fed007b.
* fixing breaking tests.
* fix warnings for .count in Swift strings and duplicate images in Asset folders, also give the Extension target all icons
* update project settings to recommended ones
* [TextFields] Removes ambiguous layout.
* [TextFields] Better code organization and comment.
* [TextFields] Adding a filled in field to the examples.
* [TextFields] Correcting placeholder not rising when text is set programatically. Also better naming.
* [TextFields] Giving examples of each floating style a set .text.
* [TextFields] Adding placeholder float test.
