iOS：从NSString中删除（一个html字符串）

So I have an NSString which is basically an html string with all the usual html elements. The specific thing I would like to do is to just strip it from all the img tags. The img tags may or may not have max-width, style or other attributes so I do not know their length up front. They always end with />

所以我有一个NSString,它基本上是一个包含所有常用html元素的html字符串。我想要做的具体事情就是从所有img标签中删除它。 img标签可能有也可能没有max-width,style或其他属性,所以我不知道它们的长度。它们总是以/>结束

How could I do this?

我怎么能这样做?

EDIT: Based on nicolasthenoz's answer, I came up with a solution that requires less code:

编辑:基于nicolasthenoz的答案,我想出了一个需要更少代码的解决方案:

NSString *HTMLTagss = @"<img[^>]*>"; //regex to remove img tag
NSString *stringWithoutImage = [htmlString stringByReplacingOccurrencesOfRegex:HTMLTagss withString:@""];

2 个解决方案

#1

You can use the NSString method stringByReplacingOccurrencesOfString with the NSRegularExpressionSearch option:

您可以将NSString方法stringByReplacingOccurrencesOfString与NSRegularExpressionSearch选项一起使用:

NSString *result = [html stringByReplacingOccurrencesOfString:@"<img[^>]*>" withString:@"" options:NSCaseInsensitiveSearch | NSRegularExpressionSearch range:NSMakeRange(0, [html length])];

Or you can also use the replaceMatchesInString method of NSRegularExpression. Thus, assuming you have your html in a NSMutableString *html, you can:

或者您也可以使用NSRegularExpression的replaceMatchesInString方法。因此,假设您在NSMutableString * html中有html,您可以:

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<img[^>]*>"
                                                                       options:NSRegularExpressionCaseInsensitive
                                                                         error:nil];

[regex replaceMatchesInString:html
                      options:0
                        range:NSMakeRange(0, html.length)
                 withTemplate:@""];

I'd personally lean towards one of these options over the stringByReplacingOccurrencesOfRegex method of RegexKitLite. There's no need to introduce a third-party library for something as simple as this unless there was some other compelling issue.

我个人倾向于使用RegexKitLite的stringByReplacingOccurrencesOfRegex方法中的一个选项。除非有其他令人信服的问题,否则没有必要为这样简单的事情引入第三方库。

2 个解决方案

#1

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