如何将基础64图像数据字符串提供到UIWebView中？

Question

我在NSString中有一个base64图像数据。我想在UIWebView中直接显示它。我怎样才能做到这一点？

到目前为止我所知道的是这样的：

NSString * imageStr = /* some base64 image string */
NSData * imageData = [[NSData alloc]initWithBase64EncodedString:imageStr options:NSDataBase64DecodingIgnoreUnknownCharacters];

[webView loadData:imageData
         MIMEType:@"image/jpeg;base64"
textEncodingName:@"utf-8"
         baseURL:[NSURL URLWithString:@""]];

但它并没有在UIWebView上显示任何内容。问题是什么？感谢。

到目前为止我的参考资料：

• Image with data uri src not loading in UIWebView
• Correct way to load image into UIWebView from NSData object

Answer 1

尝试这样：

NSString * imageStr = [self encodeToBase64String:[UIImage imageNamed:@"image_name"]];
NSData *data = [[NSData alloc]initWithBase64EncodedString:imageStr options:NSDataBase64DecodingIgnoreUnknownCharacters];

[_webview loadData:data
         MIMEType:@"image/jpg"
 textEncodingName:@"utf-8"
          baseURL:[NSURL URLWithString:@""]];

- (NSString *)encodeToBase64String:(UIImage *)image {
    return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}

Answer 2

将您的MIMEType更改为＆＃34; image / jpg＆＃34;它会工作。

NSString * imageStr = /* some base64 image string */
NSData * imageData = [[NSData alloc]initWithBase64EncodedString:imageStr options:NSDataBase64DecodingIgnoreUnknownCharacters];

- [webView loadData:imageData
         MIMEType:@"image/jpeg;base64"
+ [webView loadData:imageData
         MIMEType:@"image/jpg"
textEncodingName:@"utf-8"
         baseURL:[NSURL URLWithString:@""]];