ionic3

问题 I have grouped using the lodash module as below: export class DtoTransactionCategory { categoryName: String; totalPrice: number; } groupBy import { groupBy} from 'lodash'; let result = groupBy(transactionCategoryList, (c: DtoTransactionCategory) => { return c.categoryName }); Result: So now I need to get the above array like this (i.e. totalPrice is the sum of the group ): let myNewArry = [{categoryName:"cat1",totalPrice: 9400}, {categoryName:"cat2",totalPrice: 600}] Can you tell me how to

问题 I am fetching data from API on HTML using ngFor , but filtering with ngIf , see below home.html code. {{list.i}} is showing me the array position number (17,18,19...), but I want to show 1,2,3,4.. , how do I do that? <ion-list no-lines *ngFor="let list of display;let i=index;" > <ion-item text-wrap *ngIf="list.ENTUSR='kiran'"> {{list.i}} {{list.ENTUSR}} {{list.DESCRPITION}} </ion-item> </ion-list> 回答1: I think here it is what you need Component Side : getUsers(users , name){ return users

问题 I'm doing a project and I keep getting the error "Error trying to diff '[object Object]'. Only arrays and iterables are allowed" I looked up the error and there is two ways to do it, change the incoming data(no possible) or "transform the object in my component". I need to do the latter, but i can't find any way how to as I'm only a student. Here's some of the relevant code: //characters.ts apiUrl = 'https://swapi.co/api/people'; getUsers() { return new Promise(resolve => { this.http.get(this

问题 We have developed an IONIC based mobile app to perform In-App payment using UPI. It uses IONIC Native Web Intent plugin. a. b. "@ionic-native/web-intent": "^4.14.0", This is shim layer for the Android intent mechanism and makes web intent call to BHIM/PhonePe/GooglePay It works well with all UPI apps like BHIM, PhonePe. But does not work with GooglePay, For some reason with same code , Google Pay returns NULL Intent to OnActivityResult() even though the UPI Payment is successful. I wrote

问题 i want to use jsPDF library with IONIC3 to download PDF , i have created a simple document and when i try to download it with the default function from jsPDF doc.Save() it work in my browser , but in a real device won't work. So i decided to use FileTransfer Plugins from IONIC native , i have firstly created a blob File from jsPDF output , then i tried to use the writeFile() function from IONIC FILE plugin to create a new file from the blob , then i tried to download that file using Download(

问题 I would like to know how to use Ionic Storage to store Json Object with Ionic 3. I am finding it difficult as there are no examples for the ionic 3 and i am stuck. Nothing on the net seems to be updated. A supporting example for Ionic Storage would be of great use. Thank you in advance. 回答1: Yes, you can store JSON objects in Ionic storage. let your_json_object = { "name":"John", "age":30, "car":null }; // set a key/value storage.set('my-json', your_json_object); // to get a key/value pair

问题 I have a property which should set the font size of a text element. I've tried this so far: <textarea placeholder="Enter your TAX ID" id="tax" [(ngModel)]="tax_out" [(ngModel)]="tax_in" style="width: 100%; height: 100%; position: relative; bottom: 0px; fontsize: {{fontsize}}"> </textarea> Unfortunately without success. I get this in logcat: "WARNING: sanitizing unsafe style value width: 100%; height: 100%; position: relative; bottom: 0px; fontsize: (see http://g.co/ng/security#xss)." "[WARN]

问题 I need to remove the border from ion-search bar . I tried the following code in variable.scss but got no luck.I am pretty new in ionic so please tell me in details. .searchbar-input { -webkit-box-shadow: 0 2px 2px 0 rgba(255, 255, 255, 1), 0 3px 1px -2px rgba(255, 255, 255, 1), 0 1px 5px 0 rgba(255, 255, 255, 1); box-shadow: 0 2px 2px 0 rgba(255, 255, 255, 1), 0 3px 1px -2px rgba(255, 255, 255, 1), 0 1px 5px 0 rgba(255, 255, 255, 1); } 回答1: Is hard to figure out a solution without the output

问题 Hello everyone when i'm compile my app in prod release i got an error Can't bind to 'ngModel' since it isn't a known property of 'ion-select'. My code <ion-select #sel1 [(ngModel)]="Selectedcat" (ngModelChange)="onChange()" > i make this configuration in appmodule : imports: [ BrowserModule, HttpModule, Ionic2RatingModule , FormsModule, IonicModule.forRoot(MyApp), IonicStorageModule.forRoot(), IonicImageLoader.forRoot() ] thanks for yours help 回答1: I solved my problem the problem was because

问题 I have to change the color of the navbar of one page when scrolling a bit. Here we have part of my xml file: <ion-header no-border> <ion-navbar color="{{ toolbar_color }}"> <ion-title (click)="change()">{{userdata.Name}}</ion-title> </ion-navbar> </ion-header> <ion-content fullscreen class="container" (ionScrollEnd)="scrollHandler($event)"> I tryed first by changing it using a click event and it worked fine. change() { if ( this.toolbar_color == "danger" ) { this.toolbar_color = "light" }