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[iOS]App in simplified Chinese. After using the app for a period of time, it may appear that the font is disordered, which may be big or small #36527

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flutter/engine
#12426
Closed
[iOS]App in simplified Chinese. After using the app for a period of time, it may appear that the font is disordered, which may be big or small#36527
flutter/engine
#12426
Labels
a: fidelityMatching the OEM platforms bettera: typographyText rendering, possibly libtxtframeworkflutter/packages/flutter repository. See also f: labels.
@jayden320

Description

@jayden320
jayden320
opened on Jul 19, 2019 · edited by jayden320

Steps to Reproduce

App in simplified Chinese. After using the app for a period of time, it may appear that the font is disordered in each page, which may be big or small. This doesn't happen on android
I build app with flutter 1.5.4-hotfix.2 and 1.7.8-hotfix.3,They all have the same problem.

when font is disordered:
image

In normal times:
IMG_2440

Logs


[  +44 ms] executing: [/Users/suteki/Flutter/flutter/] git log -n 1 --pretty=format:%H
[  +51 ms] Exit code 0 from: git log -n 1 --pretty=format:%H
[        ] 7a4c33425ddd78c54aba07d86f3f9a4a0051769b
[        ] executing: [/Users/suteki/Flutter/flutter/] git describe --match v*.*.* --first-parent --long --tags
[  +27 ms] Exit code 0 from: git describe --match v*.*.* --first-parent --long --tags
[        ] v1.5.4-hotfix.2-0-g7a4c33425
[  +13 ms] executing: [/Users/suteki/Flutter/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[  +11 ms] Exit code 128 from: git rev-parse --abbrev-ref --symbolic @{u}
[        ] fatal: HEAD does not point to a branch
[  +12 ms] executing: [/Users/suteki/Flutter/flutter/] git rev-parse --abbrev-ref HEAD
[  +14 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[        ] HEAD
[ +262 ms] executing: /Users/suteki/Library/Android/sdk/platform-tools/adb devices -l
[  +12 ms] Exit code 0 from: /Users/suteki/Library/Android/sdk/platform-tools/adb devices -l
[        ] List of devices attached
[  +11 ms] executing: idevice_id -h
[  +51 ms] /usr/bin/xcrun simctl list --json devices
[ +310 ms] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +5 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[   +1 ms] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[   +1 ms] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FuchsiaCacheArtifacts' is not required, skipping update.
[ +115 ms] Found plugin battery at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/battery-0.2.3/
[  +34 ms] Found plugin city_pickers at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/city_pickers-0.1.22/
[  +14 ms] Found plugin device_info at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/device_info-0.4.0+2/
[   +5 ms] Found plugin fake_analytics at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_analytics-0.2.3/
[   +3 ms] Found plugin fake_notch at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_notch-0.0.2+5/
[   +3 ms] Found plugin fake_path_provider at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_path_provider-0.1.0/
[   +1 ms] Found plugin fake_tencent at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_tencent-0.3.3/
[   +2 ms] Found plugin fake_wechat at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_wechat-0.3.2/
[   +2 ms] Found plugin fake_weibo at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_weibo-0.2.2/
[   +6 ms] Found plugin flutter_baidu_tts_plugin at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_baidu_tts_plugin-55acc17bb945d8535863e2ea7e4f0031469a4b3c/
[   +5 ms] Found plugin flutter_deeplink at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_deeplink-8fb13724e5095e2c922e8868840529c7ce9f0fe2/
[   +3 ms] Found plugin flutter_mix_push at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_mix_push-964c90e815bb0e207f3256e6736246ec860f86db/
[   +3 ms] Found plugin flutter_statusbar_manager at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_statusbar_manager-b33a851e5627901560869f9ed6a2895f3dd5f9a3/
[   +3 ms] Found plugin flutter_umpush at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_umpush_plugin-0d08cd9f87cdf717b909870a2f1d8400e8a08aee/
[   +1 ms] Found plugin flutter_user_agent at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/flutter_user_agent-1.0.1/
[   +1 ms] Found plugin flutter_webview_plugin at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_webview_plugin-23b0dd8585d35f31887af2acacc5437a4812b7ed/
[   +3 ms] Found plugin fluttertoast at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fluttertoast-3.1.0/
[  +10 ms] Found plugin image_cropper at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_cropper-1.0.2/
[   +1 ms] Found plugin image_picker at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_picker-0.6.0+17/
[   +1 ms] Found plugin image_picker_saver at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_picker_saver-0.3.0/
[   +1 ms] Found plugin in_app_purchase at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/in_app_purchase-0.1.1+2/
[  +12 ms] Found plugin mob_ads_pangolin at /Users/suteki/Flutter/flutter/.pub-cache/git/mob_ads_pangolin-057efd8f8a5c99dafc60ef0b9621c4dd702051e6/
[   +2 ms] Found plugin package_info at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/package_info-0.4.0+5/
[   +2 ms] Found plugin path_provider at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/path_provider-0.5.0+1/
[   +2 ms] Found plugin permission_handler at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/permission_handler-3.2.0/
[  +11 ms] Found plugin screen at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/screen-0.0.5/
[   +1 ms] Found plugin share at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/share-0.6.2/
[   +1 ms] Found plugin shared_preferences at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/shared_preferences-0.4.3/
[   +6 ms] Found plugin sqflite at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/sqflite-1.1.6+1/
[   +9 ms] Found plugin tobias at /Users/suteki/Flutter/flutter/.pub-cache/git/tobias-578ba153d681dfa099d1f0ded6d85ec325eaa070/
[   +1 ms] Found plugin url_launcher at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/url_launcher-5.1.0/
[  +29 ms] Found plugin battery at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/battery-0.2.3/
[   +8 ms] Found plugin city_pickers at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/city_pickers-0.1.22/
[   +3 ms] Found plugin device_info at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/device_info-0.4.0+2/
[   +1 ms] Found plugin fake_analytics at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_analytics-0.2.3/
[   +1 ms] Found plugin fake_notch at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_notch-0.0.2+5/
[        ] Found plugin fake_path_provider at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_path_provider-0.1.0/
[        ] Found plugin fake_tencent at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_tencent-0.3.3/
[        ] Found plugin fake_wechat at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_wechat-0.3.2/
[        ] Found plugin fake_weibo at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fake_weibo-0.2.2/
[   +1 ms] Found plugin flutter_baidu_tts_plugin at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_baidu_tts_plugin-55acc17bb945d8535863e2ea7e4f0031469a4b3c/
[   +1 ms] Found plugin flutter_deeplink at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_deeplink-8fb13724e5095e2c922e8868840529c7ce9f0fe2/
[   +1 ms] Found plugin flutter_mix_push at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_mix_push-964c90e815bb0e207f3256e6736246ec860f86db/
[   +1 ms] Found plugin flutter_statusbar_manager at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_statusbar_manager-b33a851e5627901560869f9ed6a2895f3dd5f9a3/
[   +2 ms] Found plugin flutter_umpush at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_umpush_plugin-0d08cd9f87cdf717b909870a2f1d8400e8a08aee/
[   +1 ms] Found plugin flutter_user_agent at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/flutter_user_agent-1.0.1/
[        ] Found plugin flutter_webview_plugin at /Users/suteki/Flutter/flutter/.pub-cache/git/flutter_webview_plugin-23b0dd8585d35f31887af2acacc5437a4812b7ed/
[        ] Found plugin fluttertoast at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/fluttertoast-3.1.0/
[   +4 ms] Found plugin image_cropper at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_cropper-1.0.2/
[        ] Found plugin image_picker at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_picker-0.6.0+17/
[        ] Found plugin image_picker_saver at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/image_picker_saver-0.3.0/
[        ] Found plugin in_app_purchase at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/in_app_purchase-0.1.1+2/
[   +5 ms] Found plugin mob_ads_pangolin at /Users/suteki/Flutter/flutter/.pub-cache/git/mob_ads_pangolin-057efd8f8a5c99dafc60ef0b9621c4dd702051e6/
[        ] Found plugin package_info at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/package_info-0.4.0+5/
[   +1 ms] Found plugin path_provider at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/path_provider-0.5.0+1/
[   +1 ms] Found plugin permission_handler at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/permission_handler-3.2.0/
[   +5 ms] Found plugin screen at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/screen-0.0.5/
[        ] Found plugin share at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/share-0.6.2/
[        ] Found plugin shared_preferences at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/shared_preferences-0.4.3/
[   +5 ms] Found plugin sqflite at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/sqflite-1.1.6+1/
[   +6 ms] Found plugin tobias at /Users/suteki/Flutter/flutter/.pub-cache/git/tobias-578ba153d681dfa099d1f0ded6d85ec325eaa070/
[   +1 ms] Found plugin url_launcher at /Users/suteki/Flutter/flutter/.pub-cache/hosted/pub.flutter-io.cn/url_launcher-5.1.0/
[  +92 ms] Launching lib/main.dart on iPhone 8 in debug mode...
[   +7 ms] executing: /usr/bin/defaults read /Users/suteki/Desktop/FNovel/ios/Runner/Info CFBundleIdentifier
[ +107 ms] Exit code 0 from: /usr/bin/defaults read /Users/suteki/Desktop/FNovel/ios/Runner/Info CFBundleIdentifier
[        ] $(PRODUCT_BUNDLE_IDENTIFIER)
[  +23 ms] Building Runner.app for 9E67BBF4-5B1A-468B-A450-9616F073E064.
[   +7 ms] executing: script /dev/null /usr/bin/log stream --style syslog --predicate processImagePath CONTAINS "9E67BBF4-5B1A-468B-A450-9616F073E064"
[  +42 ms] [DEVICE LOG] Filtering the log data using "processImagePath CONTAINS "9E67BBF4-5B1A-468B-A450-9616F073E064""
[ +461 ms] Skipping kernel compilation. Fingerprint match.
[+1377 ms] Building bundle
[   +1 ms] Writing asset files to build/flutter_assets
[ +246 ms] "flutter run" took 3,398ms.
[        ] "flutter run" took 3,398ms.



   info • Unused import: 'package:fnovel/pages/share_paragraph/share_paragraph_page.dart' • lib/app/app_navigator.dart:8:8 • unused_import
   info • This function has a return type of 'Type', but doesn't end with a return statement • lib/app/constant.dart:13:10 • missing_return
   info • Unused import: 'dart:io' • lib/app/tab_page.dart:1:8 • unused_import
   info • The value of the local variable 'userMgr' isn't used • lib/pages/coupon/coupon_unavailable_list_view.dart:74:9 • unused_local_variable
   info • Unused import: 'package:fnovel/pages/reader/utility/reader_database.dart' • lib/pages/download/downloaded_cell.dart:2:8 • unused_import
   info • Unused import: 'package:flutter/material.dart' • lib/pages/feedback_create/feedback_create_model.dart:4:8 • unused_import
   info • Unused import: 'package:fnovel/pages/forum_member/forum_member_page.dart' • lib/pages/forum/forum_fan_cell.dart:6:8 • unused_import
   info • Unused import: 'package:fnovel/utility/novel_cache_manager.dart' • lib/pages/forum_info/forum_info_publish_comment_cell.dart:3:8 • unused_import
   info • Unused import: 'package:cached_network_image/cached_network_image.dart' • lib/pages/forum_info/forum_info_publish_comment_cell.dart:5:8 • unused_import
   info • This function has a return type of 'Member', but doesn't end with a return statement • lib/pages/forum_info/forum_info_publish_comment_cell.dart:50:3 •
          missing_return
   info • Unused import: 'package:intl/intl.dart' • lib/pages/forum_info/forum_info_publish_view.dart:3:8 • unused_import
   info • Unused import: 'package:fnovel/utility/novel_cache_manager.dart' • lib/pages/forum_info/forum_info_receive_comment_cell.dart:3:8 • unused_import
   info • Unused import: 'package:cached_network_image/cached_network_image.dart' • lib/pages/forum_info/forum_info_receive_comment_cell.dart:5:8 • unused_import
   info • This function has a return type of 'Member', but doesn't end with a return statement • lib/pages/forum_info/forum_info_receive_comment_cell.dart:80:3 •
          missing_return
   info • The method '_buildImages' isn't used • lib/pages/forum_member/forum_member_post_cell.dart:48:16 • unused_element
   info • The method '_buildContent' isn't used • lib/pages/forum_member/forum_member_post_cell.dart:91:3 • unused_element
   info • `Future` results in `async` function bodies must be `await`ed or marked `unawaited` using `package:pedantic` •
          lib/pages/forum_post_detail/forum_post_detail_page.dart:116:7 • unawaited_futures
   info • `Future` results in `async` function bodies must be `await`ed or marked `unawaited` using `package:pedantic` •
          lib/pages/forum_post_detail/forum_post_detail_page.dart:129:7 • unawaited_futures
   info • `Future` results in `async` function bodies must be `await`ed or marked `unawaited` using `package:pedantic` •
          lib/pages/forum_post_detail/forum_post_extend_menu.dart:16:5 • unawaited_futures
   info • Unused import: 'package:fnovel/pages/forum_member/forum_member_page.dart' • lib/pages/forum_post_detail/forum_reply_view.dart:4:8 • unused_import

20 issues found. (ran in 8.3s)

[✓] Flutter (Channel unknown, v1.5.4-hotfix.2, on Mac OS X 10.14.4 18E226, locale zh-Hans-CN)
    • Flutter version 1.5.4-hotfix.2 at /Users/suteki/Flutter/flutter
    • Framework revision 7a4c33425d (3 months ago), 2019-04-29 11:05:24 -0700
    • Engine revision 52c7a1e849
    • Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)

 
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/suteki/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • ANDROID_HOME = /Users/suteki/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 10.2.1, Build version 10E1001
    • ios-deploy 1.9.4
    • CocoaPods version 1.7.4

[!] Android Studio (version 3.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[✓] VS Code (version 1.36.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.2.0

[✓] Connected device (1 available)
    • iPhone 8 • 9E67BBF4-5B1A-468B-A450-9616F073E064 • ios • com.apple.CoreSimulator.SimRuntime.iOS-12-2 (simulator)

! Doctor found issues in 2 categories.

Activity

kelvinluo1112

kelvinluo1112 commented on Jul 26, 2019

@kelvinluo1112
kelvinluo1112
on Jul 26, 2019

I think this can happen after there is any text contains both chinese and non-chinese charaters(may be non-CJK charaters as well) in the page.
Try to merge your theme's text style with TextStyle(fontFamilyFallback: ["PingFang SC", "Heiti SC"]) in iOS platform.

jmagman
added
a: fidelityMatching the OEM platforms better
frameworkflutter/packages/flutter repository. See also f: labels.
on Aug 17, 2019
dcoinapi

dcoinapi commented on Aug 20, 2019

@dcoinapi
dcoinapi
on Aug 20, 2019

I got the similar problem when korean displayed. I attached a test project to reproduce it easily.
image
image
image
flutter_app.zip

[✓] Flutter (Channel beta, v1.8.3, on Mac OS X 10.14.6 18G87, locale zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
[✓] Android Studio (version 3.4)
[✓] VS Code (version 1.36.1)
[✓] Connected device (1 available)

dcoinapi

dcoinapi commented on Aug 21, 2019

@dcoinapi
dcoinapi
on Aug 21, 2019

@GaryQian Bro, would you please take a look :)

GaryQian

GaryQian commented on Aug 21, 2019

@GaryQian
GaryQian
on Aug 21, 2019
Contributor

@jason-simmons Do you think this could be due to the ambiguous picking order for font fallback bug you recently fixed?

jason-simmons

jason-simmons commented on Aug 22, 2019

@jason-simmons
jason-simmons
on Aug 22, 2019
Member

I don't think it's related to that.

This looks like something involving locale-specific glyph lookup. The app switches from the system default locale (screenshot 0) to the "ko" locale (1) to the "zh" locale (2). Skia might select different glyphs for a code point in the device's default locale versus "zh".

dcoinapi

dcoinapi commented on Aug 22, 2019

@dcoinapi
dcoinapi
on Aug 22, 2019

I don't think it's related to that.

This looks like something involving locale-specific glyph lookup. The app switches from the system default locale (screenshot 0) to the "ko" locale (1) to the "zh" locale (2). Skia might select different glyphs for a code point in the device's default locale versus "zh".

Thanks for reply. I don't think it's a locale problem and I attached a new simple example to prove it.

          children: <Widget>[
            Text(_counter == 0
                ? '系统消息设置'
                : (_counter == 1 ? '알림메시지' : '系统消息设置')),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],

It seems that the widget rendered korean and then the chinese displayed weird in iOS system(include simulator). The example shows as below:

  1. first time, '系统消息设置' displayed normal
  2. click the plus icon and korean '알림메시지' displayed
  3. click the plus icon again, it displayed '系统消息设置' which is abnormal
    flutter_app.zip
GaryQian

GaryQian commented on Aug 23, 2019

@GaryQian
GaryQian
on Aug 23, 2019
Contributor

Hmm, thanks for trying that out. The characters that are wrongly being displayed are consistent with the korean and japanese usage of those glyphs. They seem to share the same codepoint, so the only thing that would distinguish what is shown is the locale. In absence of a locale, I wonder if there is some sort of assumption system/golbal memory that is guessing the version of the glyph to use based off of context and "remembering" the korean used previously.

CarGuo

CarGuo commented on Aug 29, 2019

@CarGuo
CarGuo
on Aug 29, 2019

I fix it with the following code :

   var themeData = ThemeData(
        primarySwatch: primarySwatch,);

   var result = themeData.copyWith(
      textTheme: themeData.textTheme.copyWith(
        display4: themeData.textTheme.display4
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display3: themeData.textTheme.display3
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display2: themeData.textTheme.display2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display1: themeData.textTheme.display1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        headline: themeData.textTheme.headline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        title: themeData.textTheme.title
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subhead: themeData.textTheme.subhead
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body2: themeData.textTheme.body2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body1: themeData.textTheme.body1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        caption: themeData.textTheme.caption
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        button: themeData.textTheme.button
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subtitle: themeData.textTheme.subtitle
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        overline: themeData.textTheme.overline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
      ),
      accentTextTheme: themeData.accentTextTheme.copyWith(
        display4: themeData.accentTextTheme.display4
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display3: themeData.accentTextTheme.display3
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display2: themeData.accentTextTheme.display2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display1: themeData.accentTextTheme.display1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        headline: themeData.accentTextTheme.headline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        title: themeData.accentTextTheme.title
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subhead: themeData.accentTextTheme.subhead
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body2: themeData.accentTextTheme.body2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body1: themeData.accentTextTheme.body1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        caption: themeData.accentTextTheme.caption
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        button: themeData.accentTextTheme.button
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subtitle: themeData.accentTextTheme.subtitle
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        overline: themeData.accentTextTheme.overline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
      ),
      primaryTextTheme: themeData.primaryTextTheme.copyWith(
        display4: themeData.primaryTextTheme.display4
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display3: themeData.primaryTextTheme.display3
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display2: themeData.primaryTextTheme.display2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        display1: themeData.primaryTextTheme.display1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        headline: themeData.primaryTextTheme.headline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        title: themeData.primaryTextTheme.title
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subhead: themeData.primaryTextTheme.subhead
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body2: themeData.primaryTextTheme.body2
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        body1: themeData.primaryTextTheme.body1
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        caption: themeData.primaryTextTheme.caption
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        button: themeData.primaryTextTheme.button
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        subtitle: themeData.primaryTextTheme.subtitle
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
        overline: themeData.primaryTextTheme.overline
            .copyWith(fontFamilyFallback: ["PingFang SC", "Heiti SC"]),
      ),
    );
    return result;
  }
dcoinapi

dcoinapi commented on Sep 5, 2019

@dcoinapi
dcoinapi
on Sep 5, 2019

I fix it with the following code :

   var themeData = ThemeData(
        primarySwatch: primarySwatch,);
 ......

It works. Thanks bro :)

GaryQian

GaryQian commented on Sep 16, 2019

@GaryQian
GaryQian
on Sep 16, 2019
Contributor

Thanks for speaking to me about this in person at GDD, I'll try to get on this as soon as I can!

GaryQian

GaryQian commented on Sep 23, 2019

@GaryQian
GaryQian
on Sep 23, 2019
Contributor

Possibly related: #40184

It may have to do with changes in the coretext backend.

GaryQian
mentioned this on Sep 23, 2019
GaryQian

GaryQian commented on Sep 23, 2019

@GaryQian
GaryQian
on Sep 23, 2019 · edited by GaryQian
Contributor

A potential workaround/solution to this is to explicitly specify the scriptCode for the supported locales and the locales you are using. In cases where the scriptCode is ambiguous, we can only guess at the proper scripts to use.

Specify locales with the Locale.fromSubtags(languageCode: 'zh', scriptCode: 'Hans') to specify simplified Chinese.

Without your actual apps, I cannot verify it fixes your specific cases but if you try this please let me know if it fixes it.

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        [iOS]App in simplified Chinese. After using the app for a period of time, it may appear that the font is disordered, which may be big or small · Issue #36527 · flutter/flutter