onReady() { constctx = uni.createCanvasContext("sign"); this.ctx = ctx; this.ctx.setStrokeStyle(this.lineColor); this.ctx.setLineWidth(this.lineWidth); // 获取canvas的宽高 constquery = uni.createSelectorQuery().in(this); query.select("#sign").boundingClientRect(); query.exec((res) ...
// 1: 通过 canvas// uni方法用在封装的组件内部时,需要使用.in()方法选取绑定范围,// 例:uni.createSelectorQuery().in(this).select('.sign-canvas')// 不然使用: uni.createSelectorQuery().select('.sign-canvas')// 具体使用请看官方文档letcanvas = uni.createSelectorQuery().in(that).select(...
ctx.draw(true); } }); }, //完成绘画并保存到本地 finish: function() { let that = this; uni.canvasToTempFilePath({ canvasId: "mycanvas", success: function(res) { console.log(res); Local.local.setItem("canvasPath", res.tempFilePath); uni.uploadFile({ url: Util.fileUrl + "/...
uni-app从入门到一 (一) uni-app安装与微信小程序安装步骤 uni-app介绍 uni-app是一个使用vue.js开发所有应用的框架,开发者只需要一套代码即可发布到Android、HS、iOS以及各种小程序端(微信、百度、QQ、支付宝)等;对于传统的方式,对不同的系统都需要各写一套项目,对于后期客户的需求变化,项目的扩展性与迭代开...
that.canvas_context = uni.createCanvasContext('grid'); //画布2 that.canvas_context2=uni.createCanvasContext('userSelectArea'); //绘制网格,指定默认红点半径 that.drawGrid(that.lastRadius); //绘制红点 that.drawFlickerPoint(); }).exec(); ...
ctx.draw(false, setTimeout(() => { uni.canvasToTempFilePath({ canvasId: this.canvas_id, quality: 1, success: (res) => { console.log('res', res) resolve(res) callback && callback(res) }, fail: (err) => { reject(JSON.stringify(err) || "Failed to generate poster:101") }...
PDF: fix bugs in CMap, see#332 Jan 22, 2025 resources Add unifont resource for tests Jan 21, 2025 tests Split font/ into a new repository at github.com/tdewolff/font Mar 4, 2024 text Fix linebreak tests Jan 21, 2025 .gitattributes ...
context.draw(); //必须加上 uniapp 没这儿玩意儿 显示不出来不比原生 不加可以显示 }, 500); }, //点击调色板事件 tapCanvas(e) { let that = this; let clientX = e.target.x - e.target.offsetLeft; let clientY = e.target.y - e.target.offsetTop; let color = uni.canvasGetImageData({...
// // @ts-expect-error uniapp-x api // board.drawImage(image, sx, sy, sw, sh); // canvas.drawImage(image, sx, sy, sw, sh); // } else { // // @ts-expect-error uniapp-x api // board.drawImage(image, sx, sy); // canvas.drawImage(image, sx, sy); // } } Expand ...
先使用 uni.createCanvasContext('canvass', this) ,获取绘图上下文,然后使用uni.createSelectorQuery().in(this).select('#canvass').boundingClientRect()获取canvas元素宽高,注意,这里的单位是px 第三步:将生成的canvas图片,转为真实图片-地址 使用uni.canvasToTempFilePath()方法生成图片,详细见官网uni.canvas...