代码淘沙0622（B-html中图片缩放）

常用处理html中图片自适应屏幕宽度

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    NSString *jsStr = [NSString stringWithFormat:@"var script = document.createElement('script');"
                       "script.type = 'text/javascript';"
                       "script.text = \"function ResizeImages() { "
                       "var myimg,oldwidth;"
                       "var maxwidth=%lf;" //缩放系数
                       "for(i=0;i <document.images.length;i++){"
                       "myimg = document.images[i];"
                       "if(myimg.width > maxwidth){"
                       "oldwidth = myimg.width;"
                       "myimg.width = maxwidth;"
                       "}"
                       "}"
                       "}\";"
                       "document.getElementsByTagName('head')[0].appendChild(script);",SCREEN_WIDTH-25];
    
    [webView stringByEvaluatingJavaScriptFromString:jsStr];
    
    [webView stringByEvaluatingJavaScriptFromString:@"ResizeImages();"];
}