当我滚动图片时,我需要放大/缩小图片。 我只问你如何检测图片上的滚动进/出?我正在尝试这个(我在互联网上找到了它):
$('.map').scroll(function(event){
if(event.originalEvent.wheelDelta /120 > 0) {
alert('scrolling up !');
}
else{
alert('scrolling down !');
}
});
//
.map
是我的照片类。
它对我不起作用....
答案 0 :(得分:2)
附加
mousewheel
事件,只要元素的滚动位置发生变化,就会发送scroll
事件。
$('#map').on('mousewheel', function(e) {
e.preventDefault();
if (e.originalEvent.wheelDelta / 120 > 0) {
console.log('scrolling up !', 'X: ', e.pageX, 'Y: ', e.pageY);
} else {
console.log('scrolling down !', 'X: ', e.pageX, 'Y: ', e.pageY);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<img src="https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xft1/v/t1.0-1/p200x200/13096358_986500121418450_5109646388299684610_n.jpg?oh=27ee2801d2df5c9426eef38bb8a45509&oe=57DF3F79&__gda__=1474329392_83b88030c94ec8611160c14161311db5" id="map">
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答案 1 :(得分:1)
有很多插件,一个是:wheelzoom on GitHub:
window.onload = function() {
wheelzoom(document.getElementById('map'));
}
&#13;
<script src="https://cdn.rawgit.com/jackmoore/wheelzoom/master/wheelzoom.js"></script>
<img src="https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xft1/v/t1.0-1/p200x200/13096358_986500121418450_5109646388299684610_n.jpg?oh=27ee2801d2df5c9426eef38bb8a45509&oe=57DF3F79&__gda__=1474329392_83b88030c94ec8611160c14161311db5" id="map">
&#13;