Ios 如何在obj-c中将图像转换为base64

我试过这样做

+ (NSString *)base64StringFromImage:(UIImage *)image {    
    NSData *data = UIImagePNGRepresentation(image);
    NSString *base64Str = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

//    base64Str = (__bridge NSString *) CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)base64Str, NULL, CFSTR(":/?#[]@!$&’()*+,;="), kCFStringEncodingUTF8);

    return base64Str;
}

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但此返回值base64Str无法在在线base642图像工具webstation上转换回图像，只需使用以下代码即可：-

NSData *imageData = UIImagePNGRepresentation(myImageView.image);
NSString * base64String = [imageData base64EncodedStringWithOptions:0];

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可能您只需要删除

nsdatabase64编码64字符行长度