uni-zhihuikuangshan/pages/my/signature/signature.vue

<template>
	<view class="wrapper">
		<view class="handRight"></view>
		<view class="handBtn">
			<view class="slide-wrapper">
				<text>选择粗细</text>
				<slider @change="updateValue" value="25" show-value class="slider" step="25" />
			</view>
		</view>
		<view class="handCenter">
			<canvas class="handWriting" disable-scroll="true" @touchstart="uploadScaleStart"
				@touchmove="uploadScaleMove" @touchend="uploadScaleEnd" @tap="mouseDown" canvas-id="handWriting">
			</canvas>
		</view>
		<view class="showimg">
			<image v-if="showimg" :src="showimg" mode=""></image>
			<text v-else>图片展示</text>
		</view>
		<view class="buttons">
			<button @click="retDraw" class="delBtn">重写</button>
			<button @click="subCanvas" class="subBtn">保存</button>
		</view>
	</view>
</template>

<script>
	import Handwriting from "./js/signature.js"
	export default {
		data() {
			return {
				lineColor: 'black',
				slideValue: 25,
				handwriting: '',
				selectColor: 'black',
				color: '',
				showimg: '',
				share_popup: false,
				
			}
		},
		onLoad() {
			this.handwriting = new Handwriting({
				lineColor: this.lineColor,
				slideValue: this.slideValue, // 0, 25, 50, 75, 100
				canvasName: 'handWriting',
			})
			
		},
		methods: {
			// 选择画笔颜色
			selectColorEvent(event) {
				this.selectColor = event;
				if (event == 'black') {
					this.color = '#1A1A1A'
				} else if (event == 'red') {
					this.color = '#ca262a'
				}
				this.handwriting.selectColorEvent(this.color)
			},
			retDraw() {
				this.handwriting.retDraw()
			},
			// 笔迹粗细滑块
			updateValue(e) {
				console.log(e.detail);
				this.slideValue = e.detail.value;
				this.handwriting.selectSlideValue(this.slideValue);
			},
			uploadScaleStart(event) {
				this.handwriting.uploadScaleStart(event)
			},
			uploadScaleMove(event) {
				this.handwriting.uploadScaleMove(event)
			},
			uploadScaleEnd(event) {
				this.handwriting.uploadScaleEnd(event)
			},
			subCanvas() {
				this.handwriting.saveCanvas().then(res => {
					this.showimg = res;
					console.log(res);
					
					this.$api.worksheet_baseimg({
						staff_num: uni.getStorageSync('user').staff_num,
						base_img:res
					}).then((res)=>{
						uni.showToast({
							icon:"none",
							title:"保存成功"
						})
						
						setTimeout(() => {
							uni.navigateBack()
						}, 1500)
						
						console.log(res)
					})
					
					
				}).catch(err => {
					console.log(err);
				});

			},
		}
	}
</script>

<style scoped="true">
	view{
		display: flex;
	}
	.wrapper {
		width: 100%;
		height: 100%;
		margin: 30upx 0;
		overflow: hidden;
		display: flex;
		align-content: center;
		flex-direction: column;
		justify-content: center;
		font-size: 28upx;
	}

	.handWriting {
		background: #fff;
		width: 100%;
		height: 350upx;
	}

	.handRight {
		align-items: center;
	}

	.handCenter {
		border: 4upx dashed #e9e9e9;
		flex: 5;
		overflow: hidden;
		box-sizing: border-box;
		width: 90%;
		margin: 0 auto;
	}

	.handTitle {
		flex: 1;
		color: #666;
		justify-content: center;
		font-size: 30upx;
	}

	.handBtn {
		flex-direction: column;
		padding: 40upx 0;
		width: 90%;
		margin: 0 auto;
	}

	.buttons {
		width: 100%;
		margin-top: 100upx;
		justify-content: space-between;
	}

	.buttons>button {
		font-size: 30upx;
		height: 80upx;
		width: 120upx;
	}

	.delBtn {
		color: #666;
	}

	.color {
		align-items: center;
	}

	.color>text {
		margin-right: 20upx;
	}

	.subBtn {
		background: #008ef6;
		color: #fff;
		text-align: center;
		justify-content: center;
	}

	.black-select {
		width: 60upx;
		height: 60upx;
	}

	.black-select.color_select {
		width: 90upx;
		height: 90upx;
	}

	.red-select {
		width: 60upx;
		height: 60upx;
	}

	.red-select.color_select {
		width: 90upx;
		height: 90upx;
	}

	.slide-wrapper {
		align-items: center;
		margin-bottom: 20upx;
	}

	.slider {
		width: 400upx;
		padding-left: 20upx;
	}

	.drop {
		width: 50upx;
		height: 50upx;
		border-radius: 50%;
		background: #FFF;
		position: absolute;
		left: 0upx;
		top: -10upx;
		box-shadow: 0px 1px 5px #888888;
	}

	.slide {
		width: 250upx;
		height: 30upx;
	}

	.showimg {
		border: 4upx solid #e9e9e9;
		overflow: hidden;
		width: 90%;
		margin: 0 auto;
		background: #eee;
		height: 350upx;
		margin-top: 40upx;
		align-items: center;
		justify-content: center;
	}

	.showimg>image {
		width: 100%;
		height: 100%;
	}

	.showimg>text {
		font-size: 40upx;
		color: #888;
	}
</style>