UIImage和Base64字符串互转

//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];