目录

Deprecated API removed after v2.2

目录

Summary

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In accordance with Flutter's Deprecation Policy, deprecated APIs that reached end of life after the 2.2 stable release have been removed.

All affected APIs have been compiled into this primary source to aid in migration. A quick reference sheet is available as well.

Changes

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This section lists the deprecations, listed by the affected class.

hasFloatingPlaceholder of InputDecoration & InputDecorationTheme

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Supported by Flutter Fix: yes

hasFloatingPlaceholder was deprecated in v1.13.2. Use floatingLabelBehavior instead. Where useFloatingPlaceholder was true, replace with FloatingLabelBehavior.auto. Where useFloatingPlaceholder was false, replace with FloatingLabelBehavior.never. This change allows more behaviors to be specified beyond the original binary choice, adding FloatingLabelBehavior.always as an additional option.

Migration guide

Code before migration:

dart
// InputDecoration
// Base constructor
InputDecoration(hasFloatingPlaceholder: true);
InputDecoration(hasFloatingPlaceholder: false);

// collapsed constructor
InputDecoration.collapsed(hasFloatingPlaceholder: true);
InputDecoration.collapsed(hasFloatingPlaceholder: false);

// Field access
inputDecoration.hasFloatingPlaceholder;

// InputDecorationTheme
// Base constructor
InputDecorationTheme(hasFloatingPlaceholder: true);
InputDecorationTheme(hasFloatingPlaceholder: false);

// Field access
inputDecorationTheme.hasFloatingPlaceholder;

// copyWith
inputDecorationTheme.copyWith(hasFloatingPlaceholder: false);
inputDecorationTheme.copyWith(hasFloatingPlaceholder: true);

Code after migration:

dart
// InputDecoration
// Base constructor
InputDecoration(floatingLabelBehavior: FloatingLabelBehavior.auto);
InputDecoration(floatingLabelBehavior: FloatingLabelBehavior.never);

// collapsed constructor
InputDecoration.collapsed(floatingLabelBehavior: FloatingLabelBehavior.auto);
InputDecoration.collapsed(floatingLabelBehavior: FloatingLabelBehavior.never);

// Field access
inputDecoration.floatingLabelBehavior;

// InputDecorationTheme
// Base constructor
InputDecorationTheme(floatingLabelBehavior: FloatingLabelBehavior.auto);
InputDecorationTheme(floatingLabelBehavior: FloatingLabelBehavior.never);

// Field access
inputDecorationTheme.floatingLabelBehavior;

// copyWith
inputDecorationTheme.copyWith(floatingLabelBehavior: FloatingLabelBehavior.never);
inputDecorationTheme.copyWith(floatingLabelBehavior: FloatingLabelBehavior.auto);

References

API documentation:

Relevant issues:

Relevant PRs:

TextTheme

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Supported by Flutter Fix: yes

Several TextStyle properties of TextTheme were deprecated in v1.13.8. They are listed in the following table alongside the appropriate replacement in the new API.

Deprecation New API
display4 headline1
display3 headline2
display2 headline3
display1 headline4
headline headline5
title headline6
subhead subtitle1
body2 bodyText1
body1 bodyText2
subtitle subtitle2

Migration guide

Code before migration:

dart
// TextTheme
// Base constructor
TextTheme(
  display4: displayStyle4,
  display3: displayStyle3,
  display2: displayStyle2,
  display1: displayStyle1,
  headline: headlineStyle,
  title: titleStyle,
  subhead: subheadStyle,
  body2: body2Style,
  body1: body1Style,
  caption: captionStyle,
  button: buttonStyle,
  subtitle: subtitleStyle,
  overline: overlineStyle,
);

// copyWith
TextTheme.copyWith(
  display4: displayStyle4,
  display3: displayStyle3,
  display2: displayStyle2,
  display1: displayStyle1,
  headline: headlineStyle,
  title: titleStyle,
  subhead: subheadStyle,
  body2: body2Style,
  body1: body1Style,
  caption: captionStyle,
  button: buttonStyle,
  subtitle: subtitleStyle,
  overline: overlineStyle,
);

// Getters
TextStyle style;
style = textTheme.display4;
style = textTheme.display3;
style = textTheme.display2;
style = textTheme.display1;
style = textTheme.headline;
style = textTheme.title;
style = textTheme.subhead;
style = textTheme.body2;
style = textTheme.body1;
style = textTheme.caption;
style = textTheme.button;
style = textTheme.subtitle;
style = textTheme.overline;

Code after migration:

dart
// TextTheme
// Base constructor
TextTheme(
  headline1: displayStyle4,
  headline2: displayStyle3,
  headline3: displayStyle2,
  headline4: displayStyle1,
  headline5: headlineStyle,
  headline6: titleStyle,
  subtitle1: subheadStyle,
  bodyText1: body2Style,
  bodyText2: body1Style,
  caption: captionStyle,
  button: buttonStyle,
  subtitle2: subtitleStyle,
  overline: overlineStyle,
);

TextTheme.copyWith(
  headline1: displayStyle4,
  headline2: displayStyle3,
  headline3: displayStyle2,
  headline4: displayStyle1,
  headline5: headlineStyle,
  headline6: titleStyle,
  subtitle1: subheadStyle,
  bodyText1: body2Style,
  bodyText2: body1Style,
  caption: captionStyle,
  button: buttonStyle,
  subtitle2: subtitleStyle,
  overline: overlineStyle,
);

TextStyle style;
style = textTheme.headline1;
style = textTheme.headline2;
style = textTheme.headline3;
style = textTheme.headline4;
style = textTheme.headline5;
style = textTheme.headline6;
style = textTheme.subtitle1;
style = textTheme.bodyText1;
style = textTheme.bodyText2;
style = textTheme.caption;
style = textTheme.button;
style = textTheme.subtitle2;
style = textTheme.overline;

References

Design document:

API documentation:

Relevant issues:

Relevant PRs:

Default Typography

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Supported by Flutter Fix: no

The default Typography was deprecated in v1.13.8. The prior default returned the text styles of the 2014 Material Design specification. This will now result in TextStyles reflecting the 2018 Material Design specification. For the former, use the material2014 constructor.

Migration guide

Code before migration:

dart
// Formerly returned 2014 TextStyle spec
Typography();

Code after migration:

dart
// Use 2018 TextStyle spec, either by default or explicitly.
Typography();
Typography.material2018();

// Use 2014 spec from former API
Typography.material2014();

References

Design document:

API documentation:

Relevant issues:

Relevant PRs:

Timeline

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除非另有说明，本文档之所提及适用于 Flutter 的最新稳定版本，本页面最后更新时间: 2024-06-01。 查看文档源码 或者 为本页面内容提出建议。