在Flutter iOS版本中，print（）语句未在Android Studio的控制台中打印任何数据，但相同的代码对于Flutter Android版本也能正常工作。
这是扑朔迷离的医生总结：
[?] Flutter (Channel master, v1.10.7-pre.109, on Mac OS X 10.14.6 18G103, locale en-IN)
[?] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[?] Xcode - develop for iOS and macOS (Xcode 11.0)
[?] Android Studio (version 3.5)
[?] IntelliJ IDEA Community Edition (version 2019.1)
[?] Connected device (1 available)
• No issues found!