iOS 富文本之图文混排之编辑

插入图片，上传服务器 看这里
直接上代码了。

1.把需要编辑的内容里面的照片过滤出来

- (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) {
        
        //获取数组中的标签
        
        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://[^'|\"|\\s|>]*" 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 ;
        
        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;
    
}

2.因为把html 转成富文本(转完之后 图片attechment里面的userinfo是空的)，所以需要给userinfo附上值，也就是上面获取的image

- (void)handlerAllAttechmentWith:(NSAttributedString *)StringString withimagesArr:(NSArray *)imageUrl{
    
    NSMutableArray *attachmentArr=[NSMutableArray array];
    
    NSRange effectiveRange = NSMakeRange(0, 0);
    
    while (effectiveRange.location + effectiveRange.length < StringString.length) {
        
        NSDictionary *attributes = [StringString attributesAtIndex:effectiveRange.location effectiveRange:&effectiveRange];
        
        NSTextAttachment *attachment = attributes[@"NSAttachment"];
        
        if (attachment) {
            
            [attachmentArr addObject:attachment];
            
        }
        
        effectiveRange = NSMakeRange(effectiveRange.location + effectiveRange.length, 0);
        
    }
    
 
    if (attachmentArr.count == imageUrl.count) {
        
        for (int i=0; i<attachmentArr.count; i++) {
            
            NSTextAttachment *att=attachmentArr[i];
            
            //userinfo这个属性是延展，看上一篇
            att.userInfo= imageUrl[i];
            
    
        }
        
    }
}

3.接下来的操作，按照插入图片，上传服务器走就可以。

在这里，只是简单实现图片的更换，文字的修改。涉及到字体大小，颜色等操作，后期慢慢加入。