不在恢复时的Cordova呼叫功能

Question

I am listening for deviceready and resume events in Cordova.

In my deviceready I only want to call a function, if the app is not starting from a resume .

Ie can I achieve the below?

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
  document.addEventListener("resume", onResume, false);
  doOnlyWhenNotFromResume();
}

function onResume(event) {
  doOnlyWhenFromResume(event);
}

Cordova version 7.1.0

Answer 1

You could use a boolean flag to avoid the doOnlyWhenNotFromResume() function from being called on resume. If you set this flag when a pause event happens it should work because after pausing the app and "warm-starting" the app again the resume event is triggered.

Declare this variable in some scope where its accessible for your functions:

var isResume = false;

And modify your existing code as follows:

document.addEventListener("deviceready", onDeviceReady, false);

function onDeviceReady() {
  document.addEventListener("resume", onResume, false);
  document.addEventListener("pause", onPause, false);

  if (!isResume) {
    doOnlyWhenNotFromResume();
  }
}

function onResume(event) {
  doOnlyWhenFromResume(event);
}

function onPause(event) {
  isResume = true;
}