UIImage Base64编码失败
我正在尝试将来自 iPhone 照片库的 UIImage 转换为 base64 编码的字符串。我的问题是，base64 编码字符串的输出与我在 jpeg 的在线 Base64 编码器上创建的 Base64 字符串不匹配。
这是我的代码：
NSData *myAttachment = UIImageJPEGRepresentation(myImage, 1.0);
NSString *base64encodedAttachment = [attachment base64EncodingWithLineLenght:76];
“attachment”是一个字符串，它将成为 url 请求的一部分。 为什么 Base64 代码与编码网站的“正常”编码不匹配？ UIImage 或 NSData 有什么特别之处吗？
干杯
i'm trying to convert a UIImage which comes from the iPhones photo library to a base64 encoded string. My problem is that the output of the base64 encoded string does not match a base64 string which i've created on a online base64 encoder for jpegs.
Here is my code:
NSData *myAttachment = UIImageJPEGRepresentation(myImage, 1.0);
NSString *base64encodedAttachment = [attachment base64EncodingWithLineLenght:76];
While "attachment" is a string which will be part of an url request.
Why does the base64 code not match the "normal" from encoding websites encoding? Is there something special about UIImage oder NSData?
Cheers
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当您调用
UIImageJPEGRepresentation时，UIImage可能会被重新编码，因此它与您上传到该在线站点的 JPEG 图像不同。如果您想 100% 确定 Base64 编码器按预期工作，请将UIImageJPEGRepresentation生成的 JPEG 表示形式保存到 JPEG 文件中，并将该文件上传到在线工具以获取 Base64 表示形式比较你的输出。It may happen that the
UIImageis re-encoded when you callUIImageJPEGRepresentationand therefore it is not identical to the JPEG image you have uploaded to that online site. If you want to be 100% sure that the base64 encoder works as expected, save the JPEG representation that comes out ofUIImageJPEGRepresentationto a JPEG file and upload that file to the online tool to obtain the base64 representation to compare your output with.如果您尝试在 mailComposer 的 messageBody 中使用此
jpeg文件..那么我必须清除您，伙计...您不能在 mailComposer 的 mailbody 中使用本地图像，该图像应该可用在服务器上并通过传递相同的
url在邮件正文中使用。如果您正在尝试其他内容...我会说遵循“Tamas”:)
If you are trying to use this
jpegfile in the messageBody of the mailComposer.. then i must clear you buddy...You cannot use the local images inside the mailbody of mailComposer, the image shud be available on the server and used in the mailbody by passing
urlof the same..If you're trying something else...i would say follow "Tamas" :)