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<title>
iOS 针对txt文档进行解码 - 宋明的博客
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<h1 class="title">
iOS 针对txt文档进行解码
</h1>
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<a href="http://apolla.cc">宋明</a>
<span style="color: #ccc;">|</span>
<span class="date"><i class="fa fa-calendar-check-o" aria-hidden="true"></i> 2023/03/18</span>
<span class="tran-posted-in">posted in</span>
<span class="posted-in"><a href='%E4%B8%80%E9%98%85%E9%98%85%E8%AF%BB.html'><i class="fa fa-folder" aria-hidden="true"></i> 一阅阅读</a></span>
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<article class="markdown-body single-content">
<p>如我上一篇文章记录，我加了打开其他APPtxt文件的小功能，紧接着碰到新问题了，我在测试过程中发现用户上传的TXT编码格式很多不单单是utf-8和gb2312,针对TXT文档进行解码，我一共经历过两个阶段，如下</p>
<p>##1.通过循环 解码不为空就返回字符串</p>
<pre class="line-numbers"><code class="language-objc"> NSArray *encodings = @[
@(NSUTF8StringEncoding),
@(0x80000632),
@(0x80000631),
@(kCFStringEncodingGB_2312_80),
@(kCFStringEncodingHZ_GB_2312),
@(kCFStringEncodingMacChineseSimp),
@(kCFStringEncodingDOSChineseSimplif),
@(kCFStringEncodingGB_18030_2000),
@(NSUTF16StringEncoding),
@(NSUTF16LittleEndianStringEncoding),
@(NSUTF16BigEndianStringEncoding),
@(NSUTF32StringEncoding),
@(NSUTF32LittleEndianStringEncoding),
@(NSUTF32BigEndianStringEncoding)
];
NSString *result = nil;
for (NSInteger i = 0; i < encodings.count; i++) {
unsigned int encoding = [encodings[i] unsignedIntValue];
NSError *error = nil;
NSString *content = [NSString stringWithContentsOfFile:filePath encoding:CFStringConvertEncodingToNSStringEncoding(encoding) error:&error];
if (!error && !TJIsEmptyObject(content)) {
result = content;
break;
}
}
return result;
</code></pre>
<blockquote>
<p>此版本对于代码会碰到 编码成功 但是会是乱码的情况。</p>
</blockquote>
<p>##2.第二阶段 通过encodingOptions 进行处理</p>
<p><code>stringEncodingForData: encodingOptions: convertedString: usedLossyConversion</code> 会自动挑选编码数组内合适的编码对字符串进行处理，目前尚未发现问题</p>
<pre class="line-numbers"><code class="language-objc"> NSArray *encodings = @[
@(NSUTF8StringEncoding),
@(0x80000632),
@(0x80000631),
@(CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_2312_80)),
@(CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingHZ_GB_2312)),
@(CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingMacChineseSimp)),
@(CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingDOSChineseSimplif)),
@(CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000)),
@(NSUTF16StringEncoding),
@(NSUTF16LittleEndianStringEncoding),
@(NSUTF16BigEndianStringEncoding),
@(NSUTF32StringEncoding),
@(NSUTF32LittleEndianStringEncoding),
@(NSUTF32BigEndianStringEncoding)
];
NSData * data = [NSData dataWithContentsOfFile:filePath];
NSString * chapterContent = @"";
BOOL lossy = NO;
[NSString stringEncodingForData:data
encodingOptions:@{NSStringEncodingDetectionSuggestedEncodingsKey:encodings}
convertedString:&chapterContent usedLossyConversion:&lossy];
return chapterContent;
</code></pre>
<blockquote>
<p>附上APP地址： <a href="https://apps.apple.com/cn/app/%E4%B8%80%E9%98%85%E9%98%85%E8%AF%BB/id1573880428">一阅阅读</a></p>
</blockquote>
<p>有想看小说的小伙伴可以试下 支持换源 支持自定义书源</p>
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