{"id":31112,"date":"2024-11-25T13:55:23","date_gmt":"2024-11-25T05:55:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/31112\/"},"modified":"2024-11-25T13:55:23","modified_gmt":"2024-11-25T05:55:23","slug":"%e5%be%ae%e4%bf%a1%e5%b0%8f%e7%a8%8b%e5%ba%8f%e5%9c%a3%e8%af%9e%e5%b8%bd%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/31112\/","title":{"rendered":"\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u201c\u5723\u8bde\u5e3d\u201d\u7684\u5b9e\u73b0\u65b9\u6cd5"},"content":{"rendered":"

\u672c\u6587\u4e3b\u8981\u548c\u5927\u5bb6\u5206\u4eab\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u201c\u5723\u8bde\u5e3d\u201d\u7684\u5b9e\u73b0\u65b9\u6cd5\uff0c\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u8fd9\u4e24\u5929\u670b\u53cb\u5708\u88ab\u201c\u5723\u8bde\u5e3d\u201d\u5237\u5c4f\uff0c\u8fd9\u4e2a\u5c0f\u7a0b\u5e8f\u8fde\u5fae\u4fe1\u5b98\u65b9\u90fd\u51fa\u6765\u8f9f\u8c23\u4e86\uff0c\u53c8\u4e00\u4e2a\u73b0\u8c61\u7ea7\u7684\u73a9\u610f\u513f\u3002\u4ece\u4ea7\u54c1\u89d2\u5ea6\u800c\u8a00\u65e0\u7591\u662f\u975e\u5e38\u6210\u529f\uff0c\u4f46\u4ece\u6280\u672f\u89d2\u5ea6\u800c\u8a00\u662f\u786e\u5b9e\u4e60\u4ee5\u4e3a\u5e38\uff0c\u521b\u610f\u5f88\u91cd\u8981\uff01\u7b80\u5355\u8bf4\u4e00\u4e0b\u601d\u8def\uff1a\u83b7\u53d6\u5934\u50cf\uff0c\u628a\u5934\u50cf\u753b\u5728canvas\u91cc\u9762\uff0c\u63a5\u7740\u5f80canvas\u91cc\u753b\u5e3d\u5b50\uff0c\u8c03\u6574\u5e3d\u5b50\u7684\u53c2\u6570\uff08\u4f4d\u7f6e\u3001\u5927\u5c0f\u3001\u65cb\u8f6c\uff09\uff0c\u6700\u540e\u4fdd\u5b58\u4e3a\u56fe\u7247\u3002<\/p>\n

\u5148\u6765\u770b\u770b\u6548\u679c<\/p>\n

\"\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u201c\u5723\u8bde\u5e3d\u201d\u7684\u5b9e\u73b0\u65b9\u6cd5\u63d2\u56fe\" <\/p>\n

\u601d\u8def<\/strong><\/span><\/p>\n

1.\u83b7\u53d6\u7528\u6237\u5934\u50cf<\/strong><\/p>\n

<\/p>\n

wx.getUserInfo({\r\n    success: function(res) {\r\n        var userInfo = res.userInfo\r\n        var avatarUrl = userInfo.avatarUrl\r\n  }\r\n})<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u91cc\u6709\u4e2a\u95ee\u9898\u9700\u8981\u6ce8\u610f\uff0ccanvas\u4e0d\u652f\u6301\u7f51\u7edc\u56fe\u7247\uff0c\u4e0a\u9762\u83b7\u53d6\u7684\u53ea\u662f\u5934\u50cf\u56fe\u7247\u5730\u5740\uff0c\u6240\u4ee5\u5728\u8fd9\u91cc\u8981\u628a\u56fe\u7247\u4e0b\u8f7d\u5230\u5fae\u4fe1\u7684\u4e34\u65f6\u76ee\u5f55\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<\/p>\n
wx.downloadFile({   \r\n    url: userInfo.avatarUrl, \r\n    success: function (res) {    \r\n        if (res.statusCode === 200) {      \r\n            avatarUrl = res.tempFilePath \/\/\u8fd9\u91cc\u7684\u5730\u5740\u662f\u6307\u5411\u672c\u5730\u56fe\u7247 \r\n        }     \r\n    }  \r\n})<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u83b7\u53d6\u5934\u50cf\u8fd9\u4e00\u6b65\u7528\u7684\u662f\u5fae\u4fe1\u73b0\u6210\u7684API \u6bd4\u8f83\u65b9\u4fbf\u3002<\/p>\n
2.\u7ed8\u5236\u7528\u6237\u5934\u50cf<\/strong><\/p>\n
\u6b64\u5904\u5c01\u88c5\u4e86\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u4e0b\u65b9avatarImg.w\u548cavatarImg.h\u662f\u6307\u5934\u50cf\u7684\u5927\u5c0f\u3002<\/p>\n
<\/p>\n
drawAvatar: function (img) {\r\n    ctx.drawImage(img, 0, 0, avatarImg.w, avatarImg.h)\r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7ed8\u5236\u56fe\u7247\u4f7f\u7528drawImage\u51fd\u6570<\/p>\n
3.\u7ed8\u5236\u5e3d\u5b50<\/strong><\/p>\n
\u7ed8\u5236\u5e3d\u5b50\u4e4b\u524d\uff0c\u6211\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5bf9\u8c61object\u6765\u4fdd\u5b58\u5e3d\u5b50\u7684\u53c2\u6570<\/p>\n
<\/p>\n
var hat = { \r\n    url: \"..\/res\/hat01.png\", \r\n    w: 40,  \r\n    h: 40,  \r\n    x: 100, \r\n    y: 100, \r\n    b: 1,\/\/\u7f29\u653e\u7684\u500d\u7387\r\n    rotate: 0\/\/\u65cb\u8f6c\u7684\u89d2\u5ea6\r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u63a5\u4e0b\u6765\u5f00\u59cb\u7ed8\u5236\u5e3d\u5b50<\/p>\n
<\/p>\n
drawHat: function (hat) { \r\n    ctx.translate(hat.x, hat.y) \r\n    ctx.scale(hat.b, hat.b) \r\n    ctx.rotate(hat.rotate * Math.PI \/ 180) \r\n    ctx.drawImage(hat.url, -hat.w \/ 2, -hat.h \/ 2, hat.w, hat.h) \r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u91cc\u8981\u7a0d\u5fae\u89e3\u91ca\u4e0b\uff0c\u662f\u4ee5\u5e3d\u5b50\u7684\u4e2d\u5fc3\u70b9\u4e3a\u539f\u70b9\u8fdb\u884c\u7f29\u653e\u3001\u65cb\u8f6c<\/p>\n
<\/p>\n
ctx.translate(hat.x, hat.y) \/\/translate\u662f\u5c06\u753b\u5e03\u7684\u4e2d\u5fc3\u70b9\u79fb\u52a8\u5230\u6307\u5b9a\u5750\u6807\u5904<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6b64\u65f6\u7684\u539f\u70b9\u5df2\u7ecf\u4ece\uff080\uff0c0)\u79fb\u52a8\u5230\uff08x,y\uff09,\u4e5f\u5c31\u662f\u5e3d\u5b50\u7684\u4e2d\u5fc3\u70b9\uff0c\u5e3d\u5b50\u957f\u7684\u4e8c\u5206\u4e4b\u4e00\u548c\u5bbd\u7684\u4e8c\u5206\u4e4b\u4e00\u4ea4\u6c47\u5904\u3002<\/p>\n
<\/p>\n
ctx.drawImage(hat.url, -hat.w \/ 2, -hat.h \/ 2, hat.w, hat.h)<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u753b\u5e3d\u5b50\u7684\u5173\u952e\u662f\u628ax\uff0cy \u79fb\u52a8\u5230\u539f\u70b9\u4e4b\u5916,\u793a\u610f\u56fe\u5982\u4e0b\uff1a<\/p>\n
\"\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u201c\u5723\u8bde\u5e3d\u201d\u7684\u5b9e\u73b0\u65b9\u6cd5\u63d2\u56fe1\" <\/p>\n
4.\u6539\u53d8\u5e3d\u5b50\u7684\u53c2\u6570<\/strong><\/p>\n
\u79fb\u52a8\u5e3d\u5b50:<\/p>\n
<\/p>\n
moveHat: function (e) { \r\n     hat.x = e.touches[0].x\r\n     hat.y = e.touches[0].y \r\n     that.drawA() \r\n }<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u65cb\u8f6c\u5e3d\u5b50\uff1a<\/p>\n
<\/p>\n
rotateHat: function (e) {  \r\n     hat.rotate = e.detail.value    \/\/\u8fd9\u4e00\u5757\u5077\u61d2\u4e86\uff0c\u7528slider\u7ec4\u4ef6 \uff0c\u6ed1\u52a8\u53d6\u503c\r\n     that.drawA() \r\n }<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7f29\u653e\u5e3d\u5b50\uff1a<\/p>\n
<\/p>\n
scaleHat: function (e) {  \r\n     hat.b = e.detail.value   \r\n     hat.w = 40 * hat.b    \r\n     hat.h = 40 * hat.b    \r\n     that.drawA()    \/\/\/\/\u6b64\u5904\u7528slider\u7ec4\u4ef6 \uff0c\u6ed1\u52a8\u53d6\u503c \r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6539\u53d8\u5e3d\u5b50\u6837\u5f0f\uff1a<\/p>\n
<\/p>\n
changeHat: function (e) {\r\n    hat.url = e.currentTarget.dataset.url  \/\/\u6539\u53d8\u5e3d\u5b50\u7684\u6837\u5f0f   \r\n    that.drawA() \r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u51e0\u4e2a\u65b9\u6cd5\u4e2d\u90fd\u6709drawA(),\u8fd9\u4e3b\u8981\u662f\u6bcf\u4e00\u6b21\u79fb\u52a8\u3001\u65cb\u8f6c\u3001\u7f29\u653e\u3001\u6539\u53d8\u53c2\u6570\u65f6\u91cd\u7ed8\u753b\u5e03\u3002<\/p>\n
5.Canvas\u5bfc\u51fa\u56fe\u7247<\/strong><\/p>\n
\u5fae\u4fe1\u5b98\u65b9\u6709\u63d0\u4f9b\u76f8\u5e94API<\/p>\n
<\/p>\n
saveToPhoto: function () {\r\n    wx.canvasToTempFilePath({  \r\n        x: 0,\r\n        y: 0,\r\n        width: 240,\r\n        height: 240,\r\n        destWidth: 240,\r\n        destHeight: 240,\r\n        canvasId: 'ctx',\r\n        success: function (res) {\r\n            \/\/canvas\u8f6c\u56fe\u7247\u6210\u529f\u56de\u8c03\r\n        }\r\n    })\r\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6700\u540e\u4fdd\u5b58\u5230\u76f8\u518c<\/p>\n
<\/p>\n
wx.saveImageToPhotosAlbum({\r\n    filePath: res.tempFilePath,\r\n}) \r\nwx.showToast({title: '\u4fdd\u5b58\u6210\u529f'})<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
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