如何在 UIWebview 中使用 SDWebImage答案

【问题标题】：How to use SDWebImage in UIWebview如何在 UIWebview 中使用 SDWebImage
【发布时间】：2014-02-16 19:17:13
【问题描述】：

就像我们在UIImageview 中使用SDWebImage 设置图像

[imageview.setImageWithURL:[NSURL URLWithString:@"http://www.domain.com/path/to/image.jpg"]
               placeholderImage:[UIImage imageNamed:@"placeholder.png"]
                      completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {... completion code here ...}];

有什么办法可以在<img>标签的UIWebview中使用SDWebImage

NSString *htmlString =@"<html lang=\"en\"><img src='http://cdn.tutsplus.com/mobile/uploads/legacy/iOS-SDK_UIView-Animation/Animate-Icon.png'   /> </div><div id=\"content\"><div>BlahBlahBlah LoremIpsum</div><br></body>"

[WebView loadHTMLString:descriptionHT baseURL:nil];

提前致谢:)

【问题讨论】：

标签： ios ios7 uiwebview sdwebimage

【解决方案1】：

首先缓存你的图片：

SDWebImageManager *manager = [SDWebImageManager sharedManager];
  [manager downloadWithURL:[NSURL URLWithString:@"http://cdn.tutsplus.com/mobile/uploads/legacy/iOS-SDK_UIView-Animation/Animate-Icon.png"]
options:
  0 progress : ^(NSInteger receivedSize, NSInteger expectedSize) {
    // progression tracking code
  }
completed:
  ^(UIImage * image, NSError * error, SDImageCacheType cacheType, BOOL finished) {
    if (image && finished) {
      [[SDImageCache sharedImageCache] storeImage:image forKey:@"icon"];
    }
  }];

然后当你需要图像时

__block NSString *imageSource;
__block NSData *imageData = [NSData data];

SDImageCache *imageCache = [SDImageCache sharedImageCache];
[imageCache queryDiskCacheForKey:@"icon" done:^(UIImage * image, SDImageCacheType cacheType) {
imageData = UIImagePNGRepresentation(image);
   if (image) {
      imageSource = [NSString stringWithFormat:@"data:image/png;base64,%@", [imageData base64Encoding]];
   } else {
      //start download of image
   }
  }];

然后在你的html中：

NSString *htmlString = [NSString stringWithFormat:@"<html lang=\"en\"><img src=\"%@\"/> </div><div id=\"content\"><div>BlahBlahBlah LoremIpsum</div><br></body>", imageSource];

[WebView loadHTMLString:htmlString baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];

缓存图像时您不必使用密钥，我只是认为它使事情变得更容易一些。

【讨论】：