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Migrating an existing Ionic 2 app to Ionic 4.0

January 31, 2019, 7:13 am
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Hello, I have an existing Ionic 2 app and have decided that it’s time to migrate it to Ionic 4. I have looked around and found various guides for migrating to 4, however most of them are either from Ionic 1 or Ionic 3. My question is would a Ionic 3 to 4 guide work well for me, or should I take a different approach to migrating?

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[ionic4] Dismiss Loading spinner among pages

January 31, 2019, 7:15 am
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No provider for Storage! IONIC 4

January 31, 2019, 7:30 am
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I tried and now it return me this error

Annotazione%202019-01-31%20162940
Annotazione 2019-01-31 162940.jpg822×333 78 KB

app module.ts 
import { LoginPageModule } from './login/login.module';
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';

import { IonicModule, IonicRouteStrategy } from '@ionic/angular';
import { IonicStorageModule, Storage } from '@ionic/storage';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';
import { StatusBar } from '@ionic-native/status-bar/ngx';
import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { HttpClientModule } from '@angular/common/http';
import { ConfigurationPageModule } from './configuration/configuration.module';


@NgModule({
  declarations: [AppComponent,
  ],
  entryComponents: [
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    IonicModule.forRoot(),
    IonicStorageModule.forRoot(),
    FontAwesomeModule,
    AppRoutingModule,
    ConfigurationPageModule,
    LoginPageModule
  ],
  providers: [
    Storage,
    StatusBar,
    SplashScreen,
    { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }
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No provider for Storage! IONIC 4

January 31, 2019, 7:34 am
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Sorry I was telling you bullshit, damned

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No provider for Storage! IONIC 4

January 31, 2019, 7:38 am
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So like I said, forget what I said before, that’s dumb, sorry, need a coffee. I had a look, I do the same as you do

package.json:

"@ionic/storage": "2.2.0",

app.module.ts

import {IonicStorageModule} from '@ionic/storage';
...
imports: [
   ...
   IonicStorageModule.forRoot(),
   ...

Do you use somewhere else the Storage in your app? And if yes, how?

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Linker command failed with exit code 1 ios build problem

January 31, 2019, 7:39 am
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my was getting problem and stuck in splash screen after that I open the console in xcode and getting an error that I have to upgrade my facebook
then I open facebook developer and I got a message to update my sdk by updating my podfile by these lines

        pod 'FacebookSDK'
	pod 'FacebookSDK/LoginKit'
	pod 'FacebookSDK/ShareKit'
	pod 'FacebookSDK/PlacesKit'

	pod 'FBSDKMessengerShareKit'

then run `pod update’
after that, i opened the xocde to build and got this error and build failed

duplicate symbol _OBJC_IVAR_$_FBSDKLikeButton._likeActionController in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_CLASS_$_FBSDKLikeButton in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_METACLASS_$_FBSDKLikeButton in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_IVAR_$_FBSDKLikeButton._objectType in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_IVAR_$_FBSDKLikeButton._isExplicitlyDisabled in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_IVAR_$_FBSDKLikeButton._soundEnabled in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_IVAR_$_FBSDKLikeButton._objectID in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKLikeButton.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKLikeButton.o)
duplicate symbol _OBJC_IVAR_$_FBSDKAppInviteContent._promotionText in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_CLASS_$_FBSDKAppInviteContent in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_METACLASS_$_FBSDKAppInviteContent in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_IVAR_$_FBSDKAppInviteContent._destination in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_IVAR_$_FBSDKAppInviteContent._promotionCode in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_IVAR_$_FBSDKAppInviteContent._appLinkURL in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
duplicate symbol _OBJC_IVAR_$_FBSDKAppInviteContent._appInvitePreviewImageURL in:
    /Users/anspireagency/Library/Developer/Xcode/DerivedData/Doctory-dumowpyuqkndphbakkgvmohbptmh/Build/Products/Debug-iphonesimulator/FBSDKShareKit/libFBSDKShareKit.a(FBSDKAppInviteContent.o)
    Doctory/Plugins/cordova-plugin-facebook4/FBSDKShareKit.framework/FBSDKShareKit(FBSDKAppInviteContent.o)
ld: 1192 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
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Ion-toast change background-color problem

January 31, 2019, 7:43 am
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Hello! I have created a component and inside it, I am using ion-toast. So I added cssClass to change the background-color of the toast. I have searched every topic regarding it, but nothing works. The docs are not helpful at all. What should I do in order to make it work? Basically I need two different classes based in post result. If I get an error, I want background-color: red and if I get a success, I want the .toast-message to have background-color: green. Any clues? Thank you.

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Ion-select in v4 beta

January 31, 2019, 7:44 am
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Having the same problem with the v4 RC. Is there any chance @AaronSterling ort someone else could give an example of how it should be done?

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No provider for Storage! IONIC 4

January 31, 2019, 7:46 am
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Also, as I said something stupid, I would be happy to clone your project and give a try if you want :wink:

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No provider for Storage! IONIC 4

January 31, 2019, 7:48 am
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Yes I create a simple login page which saves url and credential on storage
that’s the code:

import { Storage } from '@ionic/storage';

await this.storage.get("Connection").then(res => {
      if (res != undefined) {
        this.IP = res
        ServiceRootUrl = "http://" + res";
      }
 else {
        this.IP = "10.0.2.2"
        ServiceRootUrl = "http://" +this.IP"
        this.storage.set("Connection", ServiceRootUrl);
      }
    })

It work but then when i change page then i throws me that error.
this is the only page where I use storage

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Migrating an existing Ionic 2 app to Ionic 4.0

January 31, 2019, 7:48 am
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The jump from Ionic 2 to 3 wasn’t very big, therefore a 3 to 4 upgrade guide should work for 2 to 4 as well.

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Linker command failed with exit code 1 ios build problem

January 31, 2019, 7:49 am
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There is the solution:

Remember that you can make a little search in this forum before create a new post.

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Ionic native/core@5.0.0 error compile

January 31, 2019, 7:49 am
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I update my component ionic native/core into 5.0.0 version because I need this version to work other plugin but when I compile with --prod give me a following error:

[16:42:09] typescript error
Error encountered resolving symbol values statically. Only initialized variables and constants can be
referenced because the value of this variable is needed by the template compiler (position 100:22 in the
original .ts file), resolving symbol Plugin in
C:/_programacion/node_modules/@ionic-native/core/decorators/interfaces.d.ts, resolving
symbol Plugin in C:/_programacion/node_modules/@ionic-native/core/index.d.ts, resolving
symbol StatusBar in C:/_programacion/node_modules/@ionic-native/status-bar/index.d.ts,
resolving symbol StatusBar in
C:/_programacion/node_modules/@ionic-native/status-bar/index.d.ts

[16:42:09] ionic-app-script task: “build”
[16:42:09] Error: The Angular AoT build failed. See the issues above
Error: The Angular AoT build failed. See the issues above
at C:_programacion\node_modules@ionic\app-scripts\dist\aot\aot-compiler.js:237:55
at step (C:_programacion\node_modules@ionic\app-scripts\dist\aot\aot-compiler.js:32:23)
at Object.next (C:_programacion\node_modules@ionic\app-scripts\dist\aot\aot-compiler.js:13:53)
at fulfilled (C:_programacion\node_modules@ionic\app-scripts\dist\aot\aot-compiler.js:4:58)
[ERROR] An error occurred while running subprocess ionic-app-scripts.

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No provider for Storage! IONIC 4

January 31, 2019, 7:53 am
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that’s maybe the error, I don’t think you can combine await with then which are basically the same

so

const res = await this.storage.get("Connection");

if (res != undefined) {
        this.IP = res
        ServiceRootUrl = "http://" + res";
      }
 else {
        this.IP = "10.0.2.2"
        ServiceRootUrl = "http://" +this.IP"
        await this.storage.set("Connection", ServiceRootUrl);
      }

or

this.storage.get("Connection").then(async (res)=> {
      if (res != undefined) {
        this.IP = res
        ServiceRootUrl = "http://" + res";
      }
 else {
        this.IP = "10.0.2.2"
        ServiceRootUrl = "http://" +this.IP"
        await this.storage.set("Connection", ServiceRootUrl);
      }
    })
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Ionic 4 native plugin problem

January 31, 2019, 7:54 am
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When I compile using native/core version 5.0.0 give me an error when I compile
any ideas?

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No provider for Storage! IONIC 4

January 31, 2019, 7:54 am
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also did you inject the storage in the constructor of the component/service/page where you use it?

constructor(private storage: Storage) {
    }
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Linker command failed with exit code 1 ios build problem

January 31, 2019, 7:56 am
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I searched before posing my issue … I’m opening the correct file .xcworkspace

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Font size difference caused by Android font size settings

January 31, 2019, 7:56 am
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thanks man, saved me some trouble!

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Ionic Native HTTP Client delete function not works, it doesn't send the parameters

January 31, 2019, 8:01 am
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I had the same issue.

For anyone who has the same problem just set this

import { HTTP } from '@ionic-native/http';

constructor( private httpCordova: HTTP){}

this.httpCordova.setDataSerializer('json');

before HTTP call’s

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No provider for Storage! IONIC 4

January 31, 2019, 8:03 am
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Yes I do It. I’m creating a test app where I can let you show the problem

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