如何设置多个选项的默认选择值（离子选择）

Question

I am trying to have certain pre-selected values in my ion-select checkbox, but I was unable to find any answers. The values I want pre-selected have the value in my object as checked=true .

 private totalPPE:any = [ {id: 0,text:"Gloves",checked:true}, {id: 1,text:"Glasses/Goggles/Face-Shield",checked:true}, {id: 2,text:"Hard Hat",checked:true}, {id: 3,text:"Hearing Protection",checked:false}, {id: 4,text:"FR Attire",checked:true}, {id: 5,text:"Steel Toe Boots",checked:true}, {id: 6,text:"Fall Protection",checked:false}, {id: 7,text:"H2S Monitor",checked:false}, {id: 8,text:"Respiratory Protection",checked:false}, {id: 9,text:"Other",checked:false}]; 

 <ion-item> <ion-label>PPE REQUIRED FOR TASK</ion-label> <ion-select [(ngModel)]="totalPPE" name="ppe" multiple="true"> <ion-option *ngFor="let ppe of totalPPE; let i = index" [selected]="ppe.checked=='true'" [value]=ppe.text>{{ppe.text}}</ion-option> </ion-select> </ion-item> 

All of the resources I tried following unfortunately didn't work for me. I even tried the question, How to set default selected value of ion-option? , but unfortunately I found no solutions either.

Answer 1

So the issue was the object array. I don't believe Ionic can handle them so I changed the array to this:

 private totalPPE:any = ["Gloves", "Glasses/Goggles/Face-Shield", "Hard Hat", "Hearing Protection", "FR Attire", "Steel Toe Boots", "Fall Protection", "H2S Monitor", "Respiratory Protection", "Other"]; 

And added another array for default values:

 private defaultPPE:any = ["Gloves", "Glasses/Goggles/Face-Shield", "Hard Hat", "FR Attire", "Steel Toe Boots"]; 

And changed my HTML:

 <ion-item> <ion-label class="ppe">PPE REQUIRED FOR TASK</ion-label> <ion-select [(ngModel)]="defaultPPE" name="ppe" multiple="true"> <ion-option *ngFor="let ppe of totalPPE" value={{ppe}} >{{ppe}}</ion-option> </ion-select> </ion-item>