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在这个过程中支持document.createElement()方法吗
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嗯，我试试
你好，麻烦通过点击下方“反馈信息”按钮，提供出现问题的。
先建一个js
(function () {
var sign = {
utf8to16: function (str) {
var out, i, len, c;
var char2, char3;
out = "";
len = str.length;
i = 0;
while (i < len) {
c = str.charCodeAt(i++);
switch (c >> 4) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6:
case 7: {
out += str.charAt(i - 1); break;
}
case 12: case 13: {
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14: {
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0));
return out;
},
signencode: function (str) {
var signEncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var signDecodeChars = new Array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
var out, i, len;
var c1, c2, c3;
c1 = str.charCodeAt(i++) & 0xff;
if (i == len) {
out += signEncodeChars.charAt(c1 >> 2);
out += signEncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
c2 = str.charCodeAt(i++);
out += signEncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += signEncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
c3 = str.charCodeAt(i++);
out += signEncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
out += signEncodeChars.charAt(c3 & 0x3F);
return out.substr(0, out.length - 2);
signdecode: function (str) {
var c1, c2, c3, c4;
var i, len, out;
do {
c1 = signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c1 == -1);
if (c1 == -1) { break; }
c2 = signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c2 == -1);
if (c2 == -1) { break; }
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
c3 = str.charCodeAt(i++) & 0xff;
if (c3 == 61) { return out; }
c3 =signDecodeChars[c3];
} while (i < len && c3 == -1);
if (c3 == -1) { break; }
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
c4 = str.charCodeAt(i++) & 0xff;
if (c4 == 61) { return out; }
c4 = signDecodeChars[c4];
} while (i < len && c4 == -1);
if (c4 == -1) { break; }
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
return out
decode: function (str) {
c1 =signDecodeChars[str.charCodeAt(i++) & 0xff];
c2 =signDecodeChars[str.charCodeAt(i++) & 0xff];
c4 =signDecodeChars[c4];
return sign.utf8to16(out);
module.exports = {
"sign": sign
})();
然后require
然后调用sign.signencode(图片流) 后台直接base解码就可以了
谢谢，知道了
没有转成base64的。。。。不过你们可以上传拿到的本地图片链接，然后后端生成cdn地址返给你
要上传的，要存到服务器上的啊
那在小程序里可以将图片转成base64的方法吗，可以实现吗
使用wx.getImageInfo 可以直接拿到本地链接 直接显示在页面上即可 - -都不用上传
转成base64传给后台，你有什么方法吗
不支持的吧。。为啥要转base64 使用wx.getimageinfo好像是这个 可以拿到图片的本地链接
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嗯，我试试
先建一个js
(function () {
var sign = {
utf8to16: function (str) {
var out, i, len, c;
var char2, char3;
out = "";
len = str.length;
i = 0;
while (i < len) {
c = str.charCodeAt(i++);
switch (c >> 4) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6:
case 7: {
out += str.charAt(i - 1); break;
}
case 12: case 13: {
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
}
case 14: {
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0));
break;
}
}
}
return out;
},
signencode: function (str) {
var signEncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var signDecodeChars = new Array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
var out, i, len;
var c1, c2, c3;
len = str.length;
i = 0;
out = "";
while (i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if (i == len) {
out += signEncodeChars.charAt(c1 >> 2);
out += signEncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if (i == len) {
out += signEncodeChars.charAt(c1 >> 2);
out += signEncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += signEncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += signEncodeChars.charAt(c1 >> 2);
out += signEncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));
out += signEncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));
out += signEncodeChars.charAt(c3 & 0x3F);
}
return out.substr(0, out.length - 2);
},
signdecode: function (str) {
var signEncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var signDecodeChars = new Array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
var c1, c2, c3, c4;
var i, len, out;
len = str.length;
i = 0;
out = "";
while (i < len) {
do {
c1 = signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c1 == -1);
if (c1 == -1) { break; }
do {
c2 = signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c2 == -1);
if (c2 == -1) { break; }
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
do {
c3 = str.charCodeAt(i++) & 0xff;
if (c3 == 61) { return out; }
c3 =signDecodeChars[c3];
} while (i < len && c3 == -1);
if (c3 == -1) { break; }
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
do {
c4 = str.charCodeAt(i++) & 0xff;
if (c4 == 61) { return out; }
c4 = signDecodeChars[c4];
} while (i < len && c4 == -1);
if (c4 == -1) { break; }
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return out
},
decode: function (str) {
var signEncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var signDecodeChars = new Array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
var c1, c2, c3, c4;
var i, len, out;
len = str.length;
i = 0;
out = "";
while (i < len) {
do {
c1 =signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c1 == -1);
if (c1 == -1) { break; }
do {
c2 =signDecodeChars[str.charCodeAt(i++) & 0xff];
} while (i < len && c2 == -1);
if (c2 == -1) { break; }
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
do {
c3 = str.charCodeAt(i++) & 0xff;
if (c3 == 61) { return out; }
c3 =signDecodeChars[c3];
} while (i < len && c3 == -1);
if (c3 == -1) { break; }
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
do {
c4 = str.charCodeAt(i++) & 0xff;
if (c4 == 61) { return out; }
c4 =signDecodeChars[c4];
} while (i < len && c4 == -1);
if (c4 == -1) { break; }
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return sign.utf8to16(out);
}
}
module.exports = {
"sign": sign
}
})();
然后require
然后调用sign.signencode(图片流) 后台直接base解码就可以了
谢谢，知道了
没有转成base64的。。。。不过你们可以上传拿到的本地图片链接，然后后端生成cdn地址返给你
要上传的，要存到服务器上的啊
那在小程序里可以将图片转成base64的方法吗，可以实现吗
使用wx.getImageInfo 可以直接拿到本地链接 直接显示在页面上即可 - -都不用上传
转成base64传给后台，你有什么方法吗
不支持的吧。。为啥要转base64 使用wx.getimageinfo好像是这个 可以拿到图片的本地链接