关于WKWeb本地化加载和路径拼接参数

下面先介绍拼接两种靠谱方式

第一种

   fileURL = [NSURL URLWithString:@"?lan=zh" relativeToURL:fileURL];
   //这时候log fileURL发现返回url的是一个  ”?lan=zh -- OriginFileURL“ 导致加载不出来

   fileURL.filePathURL  
   //如果要获取本地资源路径用这个去加载 会返回一个file协议地址 如果是url是以file开头

第二种

        NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:finalString resolvingAgainstBaseURL:NO];
        [urlComponents setQueryItems:@[[NSURLQueryItem queryItemWithName:@"lan" value:@"zh"]]];
        urlComponents.URL  
        //得到的最终url

第三种

//前两种属于直接拼接可能存在转义问题
+ (NSString *)appendUrlParmasWithBaseUrl:(NSString * )urlString andParams:(NSDictionary * )params{
    NSURL *parsedURL = [NSURL URLWithString:urlString];
    NSString* queryPrefix = parsedURL.query ? @"&" : @"?";
    NSMutableArray* pairs = [NSMutableArray array];
    for (NSString* key in [params keyEnumerator]) {
        if (![[params objectForKey:key] isKindOfClass:[NSString class]]) {
            continue;
        }
        NSString *value = (NSString *)[params objectForKey:key];
        
        NSCharacterSet *allowedCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.~"];
        
        NSString *urlEncodingKey = [key stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacterSet];
        NSString *urlEncodingValue = [value stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacterSet];
        [pairs addObject:[NSString stringWithFormat:@"%@=%@", urlEncodingKey, urlEncodingValue]];
    }
    NSString* query = [pairs componentsJoinedByString:@"&"];
    return [NSString stringWithFormat:@"%@%@%@", urlString, queryPrefix, query];
}

本地html静态资源加载确行方案:
iOS9之前拷贝到temp()目录loadrequest

iOS9之后[wkWeb loadFileURL:fileurl allowingReadAccessToURL:url]
参数随便写的,方法使用就不赘述了