h5 js 圖片預覽並判斷

標籤：window   ons   substr   ref   efi   load   case   indexof   webkit   

//建立一個可存取到該file的urlfunction getObjectURL(file) {    var url = null;    if (window.createObjectURL != undefined) { // basic        url = window.createObjectURL(file);    } else if (window.URL != undefined) { // mozilla(firefox)        url = window.URL.createObjectURL(file);    } else if (window.webkitURL != undefined) { // webkit or chrome        url = window.webkitURL.createObjectURL(file);    }    return url;}$(document).on(‘change‘, ‘.wishfile‘, function () {    var _upload_file = $(this).val().toLowerCase();    var _upload_file_hz = _upload_file.substr(_upload_file.lastIndexOf(‘.‘) + 1);    var _upload_file = [‘jpg‘, ‘png‘, ‘gif‘, ‘jpeg‘];    if ($.inArray(_upload_file_hz, _upload_file) < 0) {        alert(‘上傳格式不正確‘);        $(this).val(‘‘);        return false;    }    var objUrl = getObjectURL(this.files[0]);    //console.log("objUrl = " + objUrl);    if (objUrl) {        // img src=objUrl    }});

 

h5 js 圖片預覽並判斷