first commit

target/classes/static/components/plugins/sysSignature/index.vue

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+<template>
+    <div class="signature-wrap">
+        <canvas id="canvas"></canvas>
+        <div :class="isLikelyMobile() ? 'action-buttons' : 'action-buttons pc-action-buttons'">
+            <button @click="clear" class="action-button-danger" type="button">清空</button>
+            <button @click="undo" class="action-button-warning" type="button">撤销</button>
+            <button @click="save" class="action-button-primary" type="button">确定</button>
+        </div>
+    </div>
+</template>
+
+<script>
+// function a() {
+//     // 检查当前屏幕方向
+//     if (window.orientation === 0 || window.orientation === 180) {
+//         // 竖屏状态
+//         console.log("竖屏状态")
+//         alert("当前不支持竖屏，请将设备调整为横屏！")
+//     } else {
+//         // 横屏状态，执行禁止旋转的操作
+//         alert("当前不支持横屏，请将设备调整为竖屏！")
+//         // 可以在这里使内容固定在竖屏方向
+//         const innerWidth = window.innerWidth
+//         const innerHeight = window.innerHeight
+//         alert(innerHeight)
+//         alert(innerWidth)
+//     }
+// }
+//
+// window.addEventListener("orientationchange", a)
+// a()
+
+let signature = null
+module.exports = {
+    name: "sysSignature",
+    data() {
+        return {
+            content: null
+        }
+    },
+    methods: {
+        clear() {
+            signature.clear()
+        },
+        undo() {
+            signature.undo()
+        },
+        rotate() {
+            signature.getRotateCanvas(90)
+        },
+        isLikelyMobile() {
+          const isTouchDevice = 'ontouchstart' in window || navigator.maxTouchPoints > 0;
+          const isSmallScreen = window.screen.width <= 768;
+          const hasMobileUA = /Android|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);
+
+          return hasMobileUA || (isTouchDevice && isSmallScreen);
+        },
+        save() {
+            if (signature.isEmpty()) {
+                alert("请签字后再保存")
+                return
+            }
+            // const png = signature.getPNG()
+            //旋转一下 横过来
+            const rotateCanvas = signature.getRotateCanvas(-90)
+            if (this.isLikelyMobile()) {
+              this.$emit("save", rotateCanvas.toDataURL())
+            } else {
+              this.$emit("save", signature.toDataURL())
+            }
+        }
+    },
+    mounted() {
+        const innerWidth = window.innerWidth
+        const innerHeight = window.innerHeight
+
+        const canvas = document.getElementById("canvas")
+        canvas.width = window.innerWidth
+        canvas.height = window.innerHeight
+        signature = new SmoothSignature(canvas, {
+            width: innerWidth - 30,
+            height: innerHeight - 30,
+            scale: 2,
+            minWidth: 4,
+            maxWidth: 10,
+            color: "#000000"
+            // bgColor: "#f6f6f6"
+        })
+    }
+}
+</script>
+
+<style scoped>
+.signature-wrap {
+    position: fixed;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    padding: 15px;
+    background: #ffffff;
+}
+
+.signature-wrap .action {
+    width: 50px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+.signature-wrap .action-buttons {
+    white-space: nowrap;
+    transform: rotate(90deg);
+    display: flex;
+    column-gap: 10px;
+    position: fixed;
+    bottom: 0px;
+    left: 60px;
+    transform: rotate(90deg);
+    display: flex;
+    flex-direction: column;
+    row-gap: 20px;
+}
+
+.signature-wrap .pc-action-buttons {
+  bottom: 50px;
+  right: 50px;
+  left: unset;
+  transform: rotate(0deg);
+}
+
+.action-buttons button {
+    color: #ffffff;
+    position: relative;
+    display: inline-block;
+    box-sizing: border-box;
+    height: auto;
+    padding: 3px 12px;
+    margin: 0;
+    font-size: 15px;
+    line-height: 1.4;
+    text-align: center;
+    border-radius: 4px;
+    cursor: pointer;
+    transition: opacity 0.15s ease;
+    -webkit-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+}
+
+.action-button-primary {
+    background-color: #1677ff;
+    border: 1px solid #1677ff;
+}
+
+.action-button-danger {
+    background-color: #ff3141;
+    border: 1px solid #ff3141;
+}
+
+.action-button-warning {
+    background-color: #ff8f1f;
+    border: 1px solid #ff8f1f;
+}
+
+.signature-wrap canvas {
+    flex: 1;
+    border-radius: 10px;
+    border: 2px dashed #ccc;
+}
+</style>