Logging frames-per-second statistics for your app requires the fps-meter module.
Import FPS Meter Module
const fpsMeter = require("tns-core-modules/fps-meter");
let callbackId;
function startFPSMeter(args) {
callbackId = fpsMeter.addCallback((fps, minFps) => {
console.log(`Frames per seconds: ${fps.toFixed(2)}`);
console.log(minFps.toFixed(2));
});
fpsMeter.start();
}
function stopFPSMeter(args) {
fpsMeter.removeCallback(callbackId);
fpsMeter.stop();
}
exports.startFPSMeter = startFPSMeter;
exports.stopFPSMeter = stopFPSMeter;
import { removeCallback, start, stop, addCallback } from "tns-core-modules/fps-meter";
let callbackId;
export function startFPSMeter(args) {
callbackId = addCallback((fps: number, minFps: number) => {
console.log(`Frames per seconds: ${fps.toFixed(2)}`);
console.log(minFps.toFixed(2));
});
start();
}
export function stopFPSMeter(args) {
removeCallback(callbackId);
stop();
}
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Demo Source
| Name |
Type |
Description |
addCallback(callback: function) |
number |
Adds a callback function to be called each time FPS data is due to be reported. Returns an unique id which can be used to remove this callback later. |
removeCallback(id: number) |
any |
Removes the callback with the specified id. |
running |
boolean |
Returns a valid indicating whether the frames-per-second meter is currently running. |
start |
void |
Starts the frames-per-second meter. |
stop |
void |
Stops the frames-per-second meter. |