UIWebView和一个编码的HTML字符串？(UIWebView and an Encoded HTML String?)
我正在开发一个iPhone项目。 我从RSS提要中获取HTML片段，并试图使用loadHTMLString方法将其加载到UIWebView中。
我从Feed收到的字符串是HTML编码的。 当我将它传递给webview时，它会显示解码后的HTML，这意味着它会显示标签以及页面内容。
在将Objective-C传递给UIWebView之前，有什么方法可以解码HTML？
编辑：添加编码HTML的示例：
这是一段非常长的段落，但这里有一个片段：
<li>Wireless Data: Wi-Fi (802.11b/g), Nike + iPod support built in, Maps location-based service, Bluetooth 2.1 + EDR</li> <li>Audio Frequency Response:&#160;20Hz to 20,000Hz</li> <li>Audio Formats Supported: <span>AAC </span>(16 to 320 Kbps), Protected <span>AAC </span>(from iTunes Store), <span>MP3 </span>(16 to 320 Kbps), <span>MP3 VBR</span>, Audible (formats 2, 3, and 4), Apple Lossless, <span>WAV</span>, and <span>AIFF</span></li> <li>Photo Support: Syncs iPod-viewable photos in <span>JPEG</span>, BMP, <span>GIF</span>, TIFF, <span>PSD </span>(Mac only), and <span>PNG</span> formats</li> <li>TV Out Support: 480p and 576p</li> <li>Video Support: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Baseline Profile up to Level 3.0 with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; <span>MPEG</span>-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats</li> <li>Environmental Requirements: Operating temperature: 32° to 95° F (0° to 35° C); Nonoperating temperature: -4° to 113° F (-20° to 45° C), Relative humidity: 5% to 95% noncondensing</li>I'm working on an iPhone project. I am getting an HTML fragment from an RSS feed and am attempting to load it into a UIWebView using the loadHTMLString method.
The string I am receiving from the feed is HTML encoded. When I pass it to the webview, it displays the decoded HTML, meaning it shows the tags along with the content of the page.
Is there a way in Objective-C to decode the HTML prior to passing it to the UIWebView?
EDIT: Adding an example of the encoded HTML:
It's a really long passage, but here's a snippet:
<li>Wireless Data: Wi-Fi (802.11b/g), Nike + iPod support built in, Maps location-based service, Bluetooth 2.1 + EDR</li> <li>Audio Frequency Response:&#160;20Hz to 20,000Hz</li> <li>Audio Formats Supported: <span>AAC </span>(16 to 320 Kbps), Protected <span>AAC </span>(from iTunes Store), <span>MP3 </span>(16 to 320 Kbps), <span>MP3 VBR</span>, Audible (formats 2, 3, and 4), Apple Lossless, <span>WAV</span>, and <span>AIFF</span></li> <li>Photo Support: Syncs iPod-viewable photos in <span>JPEG</span>, BMP, <span>GIF</span>, TIFF, <span>PSD </span>(Mac only), and <span>PNG</span> formats</li> <li>TV Out Support: 480p and 576p</li> <li>Video Support: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Baseline Profile up to Level 3.0 with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; <span>MPEG</span>-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with <span>AAC</span>-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats</li> <li>Environmental Requirements: Operating temperature: 32° to 95° F (0° to 35° C); Nonoperating temperature: -4° to 113° F (-20° to 45° C), Relative humidity: 5% to 95% noncondensing</li>
原文：https://stackoverflow.com/questions/3321908
更新时间：2023-10-12 06:10
最满意答案
已知且相对较少的列 ：如果您知道列数，比如5列，并且您想要前两列（或者只有几列），那么可以使用
read.tablecolClasses来完成：# header here is set to false because I don't see one in your file df <- read.table("~/file.txt", header = FALSE, colClasses=c("character", "numeric", "NULL", "NULL", "NULL"))在这里，我们将第3列设置为第5列为
NULL以便跳过它们。未知的列/很多列：如果您不知道列或者有太多的另一种选择是使用带有
awkpipe（或者带有cutpipe）来首先使用您需要的列过滤文件，然后加载它使用read.table：# header here is set to false because I don't see one in your file df <- read.table(pipe("awk '{print $1\"\t\"$2}' ~/file.txt"), header = FALSE, sep = "\t")删除重复的行 ：使用从
baseduplicated：df <- df[!duplicated(df), ]Known and relatively few columns: If you know the number of columns, say, 5 columns and you want the first two columns (or there are only few columns) then, this can be done using
colClassesfromread.table:# header here is set to false because I don't see one in your file df <- read.table("~/file.txt", header = FALSE, colClasses=c("character", "numeric", "NULL", "NULL", "NULL"))Here, we set the 3rd to 5th column to
NULLso that they are skipped.Unknown columns/Lot of columns: Another alternative if you don't know the columns or there are too many is to use
pipewithawk(orpipewithcutfor that matter) to filter the file first with the columns you require and then load it usingread.table:# header here is set to false because I don't see one in your file df <- read.table(pipe("awk '{print $1\"\t\"$2}' ~/file.txt"), header = FALSE, sep = "\t")Remove duplicated rows: Use
duplicatedfrombaseas:df <- df[!duplicated(df), ]
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