Comprueba la versión de iOS que se está ejecutando. FROM: https://gist.github.com/rafaelrinaldi/5873671
function checkIOSVersion() {
var match = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/),
version;
if (match !== undefined && match !== null) {
version = [
parseInt(match[1], 10),
parseInt(match[2], 10),
parseInt(match[3] || 0, 10)
];
return version.join('.');
}
return false;
}