ionic3

问题 how to delete a Document Field in Cloud Firestore? ... I'm using the code below but I can not. this.db.doc(`ProfileUser/${userId}/followersCount/FollowersCount`).update({ [currentUserId]: firebase.firestore.FieldValue.delete()}) Anyone know how to do it? 回答1: You can try as shown below: //get the reference to the doc let docRef=this.db.doc(`ProfileUser/${userId}/followersCount/FollowersCount`); // Remove the 'currentUserId' field from the document let removeCurrentUserId = docRef.update({

问题 I am trying to do an auto complete in my search bar what i have done so far is. I have an array with some strings. and then i am trying to list in my items it i am able to search the particualr item. But my requirement is not to display the items in a list. I have to make on clicking the search bar all the strings in array should come and the i have to make a search. <ion-header> <ion-navbar> <ion-title>search</ion-title> </ion-navbar> <ion-toolbar primary > <ion-searchbar (ionInput)=

问题 I wanted to create a simple component and include it on a page. I created it with ionic g component my-header (ionic-cli v3 beta), fixed the IonicPageModule bug and then added to another page. I then get this error: Error: Uncaught (in promise): Error: Template parse errors: 'my-header' is not a known element: 1. If 'my-header' is an Angular component, then verify that it is part of this module. 2. If 'my-header' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas'

问题 I am getting the following error suddenly while building Ionic 3 app for Android. Could not find org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.60-eap-25 We have one solution from Android Studio here but after I did change in my build.gradle with the following code I am still getting the error. buildscript { repositories { ... maven { url 'https://dl.bintray.com/kotlin/kotlin-eap' } } } allprojects { repositories { ... maven { url 'https://dl.bintray.com/kotlin/kotlin-eap' } } } My build.gradle

问题 Can you tell me what is the difference between Component and Page generator in the Ionic 3 app? It seems I can use page life cycle hooks like ionViewWillLeave inside the component too.So when should I use angular life cycle hooks then? If it is same then Why it has 2 generators? Hope you'll provide a feedback for this. Component generator: ionic generate component SubscribeTopicComponent Page generator: ionic generate page LoginPage 回答1: Based on the conversation from the comments: It may be

问题 Every time I change a code even it's only one line I have to run the command sudo ionic cordova prepare ios and I have to click play button on Xcode to unable to upload the app on the iPhone and see the changes in action. Basically every time I want to test the app, I am repeating this steps and each time it takes approximately 4 minutes to see if this single line of code I wrote is working or not. Is there a way to see this changes in real time? If I run sudo ionic serve and if I make a

问题 I am trying to show list with group by date using below code but i am getting exceptions Unable to get property 'forEach' of undefined or null reference can some one help me please where did i do mistack home.ts: this.events = [{ id: 1, category:'camera', title: 'First event', date: '2017-12-26' }, { id: 2, category:'accessories', title: 'Second event', date: '2017-12-27' }, { id: 3, category:'camera', title: 'Third event', date: '2017-12-26' }, { id: 4, category:'accessories', title: 'Fouth

问题 I have one screen login with home comes with menu, 4 tabs . Like home, about, location, more .And in this case menu working fine. When i login, i use this below code to navigate the screen to home pagewith all tabs , menu. That time its working fine. this.navCtrl.push(TabsPage); And when i am in about screen . I have one button to show some data and when user press ok button it will show one screen with some score data: this is that screen code: <ion-header> <ion-navbar color="navcolr" no

问题 I have an ionic 3 application where I want to use the touchId feature. The backend API is being developed in .net. For my authentication model, I'm thinking that after a user enters a login name and password and is authenticated by the server, it sends back a JWT token. I can store the token locally and then every time a user uses the touchId it checks if a token is stored locally, then matches that token to the server and that will allow access. Is this how it works? 回答1: you can use

问题 I had gone through SO questions over here. But I am Unable to get What this error is trying to suggest. Please Help me out for this. Lastly, HIGHER MODULE Means which module. As I am new to this That is why Not getting this correctly. Mycode: app.module.ts @NgModule({ declarations: [ MyApp, UsersPage, ReposPage, OrganisationsPage, UserDetailsPage, LoginPage ], imports: [ BrowserModule, HttpModule, IonicModule.forRoot(MyApp), ], bootstrap: [IonicApp], entryComponents: [ MyApp, LoginPage,