appbar hide shadow

 AppBar(

        title: const Text('My App Title'),
        elevation: 0,
      )

open url in browser

 launchUrl(Uri.parse(schoolWebsite) , mode: LaunchMode.externalApplication);

await future timeout

 final result = await Future.value(42).timeout(const Duration(seconds: 3));

image error 404

 Image.network('Your image url...',

    errorBuilder: (BuildContext context, Object exception, StackTrace stackTrace) {
        return Text('Your error widget...');
    },
),

iOS防screen shot screen capture

 import UIKit

import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
  self.window.makeSecure() //Add this line
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

//And this extension
extension UIWindow {
func makeSecure() {
    let field = UITextField()
    field.isSecureTextEntry = true
    self.addSubview(field)
    field.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
    field.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
    self.layer.superlayer?.addSublayer(field.layer)
    field.layer.sublayers?.first?.addSublayer(self.layer)
  }
}

check if in Scaffold

 (){

  try{
    Scaffold.of(context);
  }catch(e){
    //not in Scaffold
  }
  return Container();
}()

When the keyboard appears, => Overflow , the Flutter widgets resize. How to prevent this?

Updated Answer

resizeToAvoidBottomPadding is now deprecated.

The updated solution is to set resizeToAvoidBottomInset property to false.

---

Original Answer

In your Scaffold, set resizeToAvoidBottomPadding property to false.

Yellow lines under Text Widgets in Flutter?

 DefaultTextStyle(

  style: TextStyle(...),
  child: Text('Hello world'),
)

get object position on screen

extension GlobalKeyExtension on GlobalKey {
  Rect? get globalPaintBounds {
    final renderObject = currentContext?.findRenderObject();
    final translation = renderObject?.getTransformTo(null).getTranslation();
    if (translation != null && renderObject?.paintBounds != null) {
      final offset = Offset(translation.x, translation.y);
      return renderObject!.paintBounds.shift(offset);
    } else {
      return null;
    }
  }
}

final containerKey = GlobalKey();

Container(
  key: containerKey,
  width: 100,
  height: 50,
)

containerKey.globalPaintBounds

MeasureSize measuredsize measure size

https://pub.dev/packages/measured_size

Error (Xcode): no --inputencoding specified and could not detect encoding from input file ios/Runner/zh_Hant.lproj/InfoP list.strings:0:0

step 1. change to UTF-8 (if the file error)

step 2. copy and paste some dummy content

"New" = "New";

"In Progress" = "In Progress";

"Waiting" = "Waiting";

"Closed" = "Closed";

Force Flutter navigator to reload state when popping

Short answer:

Use this in 1st page:

Navigator.pushNamed(context, '/page2').then((_) => setState(() {}));

and this in 2nd page:

Navigator.pop(context);