图片转成base64编码



//UIImage图片转成Base64字符串:
UIImage *originImage = [UIImage imageNamed:@ "originImage.png" ];
NSData *data = UIImageJPEGRepresentation(originImage, 1.0f);
NSString *encodedImageStr = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
     
//Base64字符串转UIImage图片:
NSData *decodedImageData = [[NSData alloc] 
initWithBase64EncodedString:encodedImageStr options:NSDataBase64DecodingIgnoreUnknownCharacters];
UIImage *decodedImage = [UIImage imageWithData:decodedImageData];

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