crash: Attempt to present <UIImagePickerController: 0x105821c00> on <UITabBarController: 0x106079600> whose view is not in the window hierarchy!
    when use image_picker in my iOS project, try to open camera or album,it can be appear. but when i execute 'flutter run -d XXX',It works well. 

      [✓] Flutter (Channel stable, 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/tsfa/development/flutter
    • Framework revision 7a4c33425d (7 weeks 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/tsfa/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • 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)
    • All Android licenses accepted.

[✓] 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 1.5.3