init

src/components/ImageCropper/utils.js

@@ -0,0 +1,58 @@
+/* eslint-disable */
+
+/**
+ *
+ * @param e
+ * @param arg_opts
+ * @returns {boolean}
+ */
+export function effectRipple(e, arg_opts) {
+    let opts = Object.assign({
+            ele: e.target, // 波纹作用元素
+            type: 'hit', // hit点击位置扩散　center中心点扩展
+            bgc: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
+        }, arg_opts),
+        target = opts.ele;
+    if (target) {
+        let rect = target.getBoundingClientRect(),
+            ripple = target.querySelector('.e-ripple');
+        if (!ripple) {
+            ripple = document.createElement('span');
+            ripple.className = 'e-ripple';
+            ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
+            target.appendChild(ripple);
+        } else {
+            ripple.className = 'e-ripple';
+        }
+        switch (opts.type) {
+            case 'center':
+                ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px';
+                ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px';
+                break;
+            default:
+                ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px';
+                ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px';
+        }
+        ripple.style.backgroundColor = opts.bgc;
+        ripple.className = 'e-ripple z-active';
+        return false;
+    }
+}
+// database64文件格式转换为2进制
+/**
+ *
+ * @param data
+ * @param mime
+ * @returns {*}
+ */
+export function data2blob(data, mime) {
+    // dataURL 的格式为 “data:image/png;base64,****”,逗号之前都是一些说明性的文字，我们只需要逗号之后的就行了
+    data = data.split(',')[1];
+    data = window.atob(data);
+    var ia = new Uint8Array(data.length);
+    for (var i = 0; i < data.length; i++) {
+        ia[i] = data.charCodeAt(i);
+    }
+    // canvas.toDataURL 返回的默认格式就是 image/png
+    return new Blob([ia], {type: mime});
+};