Ios: Strip From Nsstring (a Html String)
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 t
Solution 1:
You can use the NSString
method stringByReplacingOccurrencesOfString
with the NSRegularExpressionSearch
option:
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:
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.
Solution 2:
Use a regular expression, find the matchs in your string and remove them ! Here is how
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<img[^>]*>"
options:NSRegularExpressionCaseInsensitive
error:nil];
NSMutableString* mutableString = [yourStringToStripFrom mutableCopy];
NSInteger offset = 0; // keeps track of range changes in the string due to replacements.for (NSTextCheckingResult* result in [regex matchesInString:yourStringToStripFrom
options:0
range:NSMakeRange(0, [yourStringToStripFrom length])]) {
NSRange resultRange = [result range];
resultRange.location += offset;
NSString* match = [regex replacementStringForResult:result
inString:mutableString
offset:offset
template:@"$0"];
// make the replacement
[mutableString replaceCharactersInRange:resultRange withString:@""];
// update the offset based on the replacement
offset += ([match length] - resultRange.length);
}
Solution 3:
You can use below function in Swift 4,5:
func filterImgTag(text: String) ->String{
return text.replacingOccurrences(of: "<img[^>]*>", with: "", options: String.CompareOptions.regularExpression)
}
Hope it can help you all! comment below if it work for you. Thanks.
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