dyf/APP
1
0
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

修复6155人员信息第一个字体缺失问题,画布取值加载预热机制

Browse Source
This commit is contained in:
微微一笑
2025-11-22 18:28:43 +08:00
parent 14d6fa7ccb
commit 97b6825420
2 changed files with 137 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
components/TextToHex/TextToHexV1.vue
View File

@ -34,7 +34,9 @@
currentCanvasWidth: 0,
currentCanvasHeight: 0,
// Canvas上下文（复用）
ctx: null
ctx: null,
// 标记是否已经预热过画布
canvasWarmed: false
};
},
computed: {
@ -62,10 +64,67 @@
this.ctx.fillRect(0, 0, this.currentCanvasWidth, this.currentCanvasHeight);
},
/**
* 预热画布，确保画布和字体完全准备好（解决APP重新打开后第一次获取数据不完整的问题）
*/
async warmupCanvas() {
if (this.canvasWarmed) {
return;
}
try {
// 设置画布尺寸
this.currentCanvasWidth = 16;
this.currentCanvasHeight = 16;
// 清空画布
this.clearCanvas();
// 绘制一个测试字符来预热字体和画布
this.ctx.setFillStyle(this.color);
this.ctx.setFontSize(this.fontSize);
this.ctx.font = `${this.fontSize}px "PingFangBold", "PingFang SC", Arial, sans-serif`;
this.ctx.setTextBaseline('middle');
this.ctx.fillText('测', 0, 8);
// 等待画布绘制完成
await new Promise((resolve) => {
this.ctx.draw(false, () => {
// 获取一次测试数据，确保canvasGetImageData API已准备好
setTimeout(() => {
uni.canvasGetImageData({
canvasId: 'reusableCanvas',
x: 0,
y: 0,
width: 16,
height: 16,
success: () => {
this.canvasWarmed = true;
resolve();
},
fail: () => {
this.canvasWarmed = true;
resolve();
}
});
}, 100);
});
});
// 额外等待确保字体完全加载
await new Promise(resolve => setTimeout(resolve, 200));
} catch (ex) {
console.log("画布预热异常:", ex);
this.canvasWarmed = true; // 即使失败也标记为已预热，避免重复尝试
}
},
/**
* 复用单个Canvas处理所有文本行
*/
async drawAndGetPixels() {
// 第一次调用时先预热画布（解决APP重新打开后第一次获取数据不完整的问题）
await this.warmupCanvas();
let convertCharToMatrix=function(imageData) {
// console.log("imgData=",imageData)

147
pages/6155/deviceDetail.vue
View File

@ -1528,78 +1528,58 @@
var promise = new Promise((resolve, reject) => {
try {
// 设备协议：FA 06/07/08 01 00 + 256字节数据 + FF
// 每个文本行只需要一个261字节的包
const bufferSize = 261;
const dataSize = 256; // 数据部分固定256字节
let packetSize = rgbdata.length; //每包均分的数量
let mode = rgbdata.length % packetSize; //最后一包的数量
let cnt =
1; // parseInt(rgbdata.length / packetSize) + (mode > 0 ? 1 :0); //总包数量
let curr = 1; //当前包序号
let buffer = new ArrayBuffer(bufferSize);
let dataView = new DataView(buffer);
let sendNext = () => {
if (curr > cnt) {
resolve();
return;
}
let bufferSize = 261;
console.log("bufferSize=", bufferSize)
let buffer = new ArrayBuffer(bufferSize);
let dataView = new DataView(buffer);
let startIndex = (curr - 1) * packetSize;
let endIndex = Math.min(startIndex + packetSize, rgbdata
.length);
if (startIndex > endIndex) {
return;
}
let packetData = rgbdata.slice(startIndex,
endIndex); //取一片数据发送
console.log("packetData.length=", packetData.length);
let start = 0;
if (curr == 1) {
dataView.setUint8(0, 0xFA);
dataView.setUint8(1, type);
dataView.setUint8(2, 0x01);
dataView.setUint8(3, 0x00);
start = 4;
}
for (let i = 0; i < packetData.length; i++) {
dataView.setUint8(start + i, packetData[i]);
}
dataView.setUint8(bufferSize - 1, 0xFF);
let inteval = 200;
//parseInt(this.inteval ? this.inteval : 80);
//console.log("inteval=", inteval)
ble.sendData(f.deviceId, buffer, f.writeServiceId, f
.wirteCharactId, 30).then(() => {
curr++;
setTimeout(sendNext, inteval);
}).catch(err => {
if (err.code == '10007') {
setTimeout(sendNext, inteval);
} else {
reject(err);
}
});
// 写入头部：FA 06/07/08 01 00
dataView.setUint8(0, 0xFA);
dataView.setUint8(1, type);
dataView.setUint8(2, 0x01);
dataView.setUint8(3, 0x00);
// 写入数据（最多256字节），确保数据是数字格式
let actualDataSize = Math.min(rgbdata.length, dataSize);
for (let i = 0; i < actualDataSize; i++) {
// 确保数据是数字格式，如果是字符串则转换
let byteValue = typeof rgbdata[i] === 'string' ? these.toByteValue(rgbdata[i]) : rgbdata[i];
dataView.setUint8(4 + i, byteValue);
}
sendNext();
} catch (ex) {
console.log("ex=", ex);
// 用0填充剩余数据部分（如果数据不足256字节）
for (let i = 4 + actualDataSize; i < bufferSize - 1; i++) {
dataView.setUint8(i, 0x00);
}
// 写入尾部：FF
dataView.setUint8(bufferSize - 1, 0xFF);
console.log(`发送文本数据包: type=0x${type.toString(16)}, 数据长度=${actualDataSize}, 总长度=${bufferSize}`);
// 发送数据包
ble.sendData(f.deviceId, buffer, f.writeServiceId, f
.wirteCharactId, 100).then(() => {
resolve();
}).catch(err => {
if (err.code == '10007') {
// 重试
setTimeout(() => {
ble.sendData(f.deviceId, buffer, f.writeServiceId, f
.wirteCharactId, 100).then(() => {
resolve();
}).catch(reject);
}, 100);
} else {
reject(err);
}
});
} catch (ex) {
console.log("构建数据包异常:", ex);
reject(ex);
}
});
@ -1612,9 +1592,10 @@
var result = null;
try {
console.log("this.$refs.textToHex=", this.$refs.textToHex);
// 获取像素数据（组件内部会自动预热画布）
result = await this.$refs.textToHex.drawAndGetPixels();
} catch (ex) {
console.log("ex=", ex);
console.log("获取画布数据异常:", ex);
}
if (!result) {
hideLoading(this);
@ -1622,7 +1603,10 @@
}
console.log("result=", result);
result = result.map(level1 => {
return level1.flat(Infinity);
return level1.flat(Infinity).map(item => {
// 确保数据转换为数字格式，避免字符串格式导致的问题
return typeof item === 'string' ? these.toByteValue(item) : item;
});
});
console.log("result=", result);
@ -1643,6 +1627,9 @@
let h3dic = [0x06, 0x07, 0x08];
let pros = [];
let flag = true;
// 在开始发送前添加延迟，确保数据完全准备好（解决第一次发送第一个字缺失的问题）
await new Promise(resolve => setTimeout(resolve, 500));
for (var i = 0; i < result.length; i++) {
let str = this.formData.textLines[i];
@ -1652,13 +1639,31 @@
let width = str.length * 16;
var rgb = result[i];
// 确保数据是数组且已转换
if (!Array.isArray(rgb)) {
console.error(`第${i+1}行数据格式错误:`, rgb);
flag = false;
break;
}
// 第一次发送前额外延迟，确保设备完全准备好
if (i === 0) {
console.log("准备发送第一个文本行，等待设备准备好...");
await new Promise(resolve => setTimeout(resolve, 500));
}
try {
// console.log("1111");
console.log(`开始发送第${i+1}个文本行 (type=0x${h3dic[i].toString(16)})`);
await sendTxtPackge(rgb, h3dic[i], str);
// console.log("222222");
console.log(`第${i+1}个文本行发送完成`);
// 每个文本行发送完成后，添加延迟确保设备处理完成
if (i < result.length - 1) {
await new Promise(resolve => setTimeout(resolve, 300));
}
} catch (ex) {
flag = false;
console.log("33333");
console.error(`发送第${i+1}个文本行出现异常:`, ex);
break;
}
}