关于路径的使用，assi下载和

直接给一个路径下载图片，这函数直接使用assi

-(void)downloadWithURL:(NSString*)RequestUrl SavePath:(NSString*)savepath withQueue :(NSOperationQueue *)queue{

NSLog(@"downloadWithURL");

    [selfindicatorAddInView];

//初始下载路径

NSURL *url = [NSURL URLWithString:RequestUrl];

//设置下载路径

    if( myRequest != nil ){

        [myRequestclearDelegatesAndCancel];

        myRequest.delegate = nil;

        myRequest = nil ;

    }

myRequest = [[ASIHTTPRequestalloc] initWithURL:url];

//设置ASIHTTPRequest代理

myRequest.delegate = self;

//设置文件保存路径

[myRequestsetDownloadDestinationPath:savepath];

    

//获取旧类

    //Class oldclass = object_getClass(obj);

//设置基本信息

    //[request setUserInfo:[NSDictionary dictionaryWithObjectsAndKeys:obj, @"Object", /*oldclass, @"oldclass", */savepath, @"savePath", info, @"info", nil]];

//设置持续连接

myRequest.shouldAttemptPersistentConnection = YES;

//添加到ASINetworkQueue队列去下载

    if( queue == nil ){

        if(myQueue == nil){

            myQueue = [[ASINetworkQueuealloc]init];

            [myQueue go];

        }

        [myQueueaddOperation:myRequest];

        return;

    }

[queue addOperation:myRequest];

}