Ios extracts the img address (image address) from the html string ),

Ios extracts the img address (image address) from the html string ),

 

 

Original article address http://www.cnblogs.com/qianLL/p/6082287.html

Sometimes the background returns an html string. We need to extract the image address from it. This is the correct regular expression.

That is

<(Img | IMG )(.*?) (/> |> </Img> |>)

 

The code below returns all the image addresses in the string, all of which are a set.

+ (NSArray *)filterImage:(NSString *)html{    NSMutableArray *resultArray = [NSMutableArray array];        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<(img|IMG)(.*?)(/>|></img>|>)" options:NSRegularExpressionAllowCommentsAndWhitespace error:nil];        NSArray *result = [regex matchesInString:html options:NSMatchingReportCompletion range:NSMakeRange(0, html.length)];                for (NSTextCheckingResult *item in result) {            NSString *imgHtml = [html substringWithRange:[item rangeAtIndex:0]];                        NSArray *tmpArray = nil;            if ([imgHtml rangeOfString:@"src=\""].location != NSNotFound) {                tmpArray = [imgHtml componentsSeparatedByString:@"src=\""];            } else if ([imgHtml rangeOfString:@"src="].location != NSNotFound) {                tmpArray = [imgHtml componentsSeparatedByString:@"src="];            }                        if (tmpArray.count >= 2) {                NSString *src = tmpArray[1];                                NSUInteger loc = [src rangeOfString:@"\""].location;                if (loc != NSNotFound) {                    src = [src substringToIndex:loc];                    [resultArray addObject:src];                }            }        }    return resultArray;}