NativeScript plugin to provide a way to capture any drawing (signatures are a common use case) from the device. You can use this component to capture really anything you want that can be drawn on the screen.
Do you need assistance on your project or plugin? Contact the nStudio team anytime at [email protected] to get up to speed with the best practices in mobile and web app development.
From your command prompt/termial go to your app's root folder and execute:
tns plugin add nativescript-drawingpad
Android | iOS |
---|---|
![]() |
![]() |
Android | iOS |
---|---|
gcacace/android-signaturepad | SignatureView |
Blog post using Angular - http://tylerablake.com/nativescript/2019/05/02/capturing-signatures.html
<Page xmlns="http://schemas.nativescript.org/tns.xsd" xmlns:DrawingPad="nativescript-drawingpad" loaded="pageLoaded">
<ActionBar title="NativeScript-DrawingPad" />
<ScrollView>
<StackLayout>
<DrawingPad:DrawingPad
height="400"
id="drawingPad"
penColor="{{ penColor }}" penWidth="{{ penWidth }}" />
</StackLayout>
</ScrollView>
</Page>
import { topmost } from 'ui/frame';
import { DrawingPad } from 'nativescript-drawingpad';
// To get the drawing...
public getMyDrawing() {
const drawingPad = topmost().getViewById('myDrawingPad');
drawingPad.getDrawing().then((res) => {
console.log(res);
});
}
// If you want to clear the signature/drawing...
public clearMyDrawing() {
const drawingPad = topmost().getViewById('myDrawingPad');
drawingPad.clearDrawing();
}
import { Component, ElementRef, ViewChild } from '@angular/core';
import { registerElement } from 'nativescript-angular/element-registry';
registerElement(
'DrawingPad',
() => require('nativescript-drawingpad').DrawingPad
);
@Component({
selector: 'drawing-pad-example',
template: `
<ScrollView>
<StackLayout>
<DrawingPad #DrawingPad
height="400"
id="drawingPad"
penColor="#ff4081" penWidth="3">
</DrawingPad>
<StackLayout orientation="horizontal">
<Button text="Get Drawing" (tap)="getMyDrawing()"></Button>
<Button text="Clear Drawing" (tap)="clearMyDrawing()"></Button>
</StackLayout>
</StackLayout>
</ScrollView>
`
})
export class DrawingPadExample {
@ViewChild('DrawingPad') DrawingPad: ElementRef;
getMyDrawing(args) {
// get reference to the drawing pad
const pad = this.DrawingPad.nativeElement;
// then get the drawing (Bitmap on Android) of the drawingpad
let drawingImage;
pad.getDrawing().then(
data => {
console.log(data);
drawingImage = data;
},
err => {
console.log(err);
}
);
}
clearMyDrawing(args) {
const pad = this.DrawingPad.nativeElement;
pad.clearDrawing();
}
}
penColor - (Color) - optional Property to specify the pen (stroke) color to use.
penWidth - (int) - optional Property to specify the pen (stroke) width to use.
clearOnLongPress - (boolean = true) - optional iOS Only Gets/sets whether a long press will clear the view.
getDrawing() - Promise (returns image if successful)
clearDrawing() - clears the drawing from the DrawingPad view.
getDrawingSvg() - Promise (returns a Scalable Vector Graphics document)
- getTransparentDrawing() - Promise (returns a bitmap with a transparent background)