Я использовал небольшой фрагмент JS: var lastTimePosition = 0;
$("video").on("timeupdate", function(){
//Time difference between last event handled and current position
var diff = Math.abs(this.currentTime - lastTimePosition);
//If difference more that 1 second, handle event (on iOS Safari this event handles 3 times per second. You can increase this parameter to be sure it will handle only on manual seeking
if (diff > 1) {
window.location = "video://currentTime:" + this.currentTime;
console.log("Time:" + this.currentTime);
}
lastTimePosition = this.currentTime;
});
Добавить этот фрагмент JS на свой UIWebView или WKWebView и прослушать обновления. Как получить обратные вызовы в Obj-C от JS см
UIWebView: How to invoke Objective C method from Javascript and send back data to Javascript in iOS?
WKWebView: http://www.joshuakehn.com/2014/10/29/using-javascript-with-wkwebview-in-ios-8.html