first commit

2026-09-09 09:14:28 +08:00
commit 5343198112
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+<template>
+    <div class="signature-wrap">
+        <canvas id="canvas"></canvas>
+        <div class="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,
+            initialized: false
+        }
+    },
+    methods: {
+        clear() {
+            signature.clear()
+        },
+        undo() {
+            signature.undo()
+        },
+        rotate() {
+            signature.getRotateCanvas(90)
+        },
+        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)
+            this.$emit("save", rotateCanvas.toDataURL())
+        },
+
+        initSignature() {
+            if (this.initialized) return;
+
+            const canvas = document.getElementById("canvas");
+            if (!canvas) return;
+
+            // 检查 canvas 是否已有有效尺寸
+            const rect = canvas.getBoundingClientRect();
+            if (rect.width <= 0 || rect.height <= 0) {
+                // 尺寸无效，稍后重试
+                setTimeout(() => this.initSignature(), 50);
+                return;
+            }
+
+            const padding = 30;
+            const width = window.innerWidth - padding;
+            const height = window.innerHeight - padding;
+
+            // 设置 CSS 尺寸
+            canvas.style.width = `${width}px`;
+            canvas.style.height = `${height}px`;
+
+            // 高清绘制
+            const dpr = window.devicePixelRatio || 1;
+            canvas.width = width * dpr;
+            canvas.height = height * dpr;
+
+            // 销毁旧实例（防止重复）
+            if (signature) {
+                signature.clear();
+            }
+
+            signature = new SmoothSignature(canvas, {
+                width: width,
+                height: height,
+                scale: dpr,
+                minWidth: 4,
+                maxWidth: 10,
+                color: "#000000"
+            });
+
+            this.initialized = true;
+        }
+    },
+    mounted() {
+        // 延迟初始化，确保 DOM 渲染完成
+        this.$nextTick(() => {
+            this.initSignature();
+        });
+    },
+
+    beforeDestroy() {
+        signature = null;
+        this.initialized = false;
+    }
+}
+</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;
+}
+
+.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>