iOS 截取字符串中的图片

简单粗暴，直接上代码，直接返回一个照片的数组，代码直接拽走就可以用

+(NSArray *) getImageurlFromHtml:(NSString *) webString
{
    NSMutableArray * imageurlArray = [NSMutableArray arrayWithCapacity:1];
    
    //标签匹配
    NSString *parten = @"<img(.*?)>";
    NSError* error = NULL;
    NSRegularExpression *reg = [NSRegularExpression regularExpressionWithPattern:parten options:0 error:&error];
    
    NSArray* match = [reg matchesInString:webString options:0 range:NSMakeRange(0, [webString length] - 1)];
    
    for (NSTextCheckingResult * result in match) {
        
        //过去数组中的标签
        NSRange range = [result range];
        NSString * subString = [webString substringWithRange:range];
        
        
        //从图片中的标签中提取ImageURL
        NSRegularExpression *subReg = [NSRegularExpression regularExpressionWithPattern:@"http://(.*?)\"" options:0 error:NULL];
        NSArray* match = [subReg matchesInString:subString options:0 range:NSMakeRange(0, [subString length] - 1)];
        NSTextCheckingResult * subRes = match[0];
        NSRange subRange = [subRes range];
        subRange.length = subRange.length -1;
        NSString * imagekUrl = [subString substringWithRange:subRange];
        
        //将提取出的图片URL添加到图片数组中
        [imageurlArray addObject:imagekUrl];
    }
    
    return imageurlArray;
}

同是天涯沦落人，祝你好运

自己加工过的一版

+ (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='"];
        } else if ([imgHtml rangeOfString:@"src="].location != NSNotFound) {
            tmpArray = [imgHtml componentsSeparatedByString:@"src="];
        }
        
        if (tmpArray.count >= 2) {
            NSString *src = tmpArray[1];
            
            
            if ([src rangeOfString:@"'"].location != NSNotFound) {
                
                NSUInteger loc = [src rangeOfString:@"'"].location;
                src = [src substringToIndex:loc];
                [resultArray addObject:src];
            }else if ([src rangeOfString:@"\""].location != NSNotFound){
                
                NSUInteger loc = [src rangeOfString:@"\""].location;
                src = [src substringToIndex:loc];
                [resultArray addObject:src];
                
            }else if ([src rangeOfString:@"\\s"].location != NSNotFound){
                
                NSUInteger loc = [src rangeOfString:@"\\s"].location;
                src = [src substringToIndex:loc];
                [resultArray addObject:src];
                
            }else if ([src rangeOfString:@">"].location != NSNotFound){
                
                NSUInteger loc = [src rangeOfString:@">"].location;
                src = [src substringToIndex:loc];
                [resultArray addObject:src];
                
            }
            
            
            
        }
    }
    
    return resultArray;
}