ios – 處理多個NSURL連接得最佳方式

我試圖以編程方式創建一個xls表.為了填寫表格,我在100左右制作了多個NSURLConnection.現在,我得方法是：

>建立連接并將數據存儲到數組中.該數組有100個對象.
>現在取第一個對象并調用連接.存儲數據.并在數組中與第二個對象建立第二個連接.這將持續到陣列中得最后一個對象.

完成100個連接平均需要14秒.有沒有辦法實現NSURLConnection以更快得方式獲得響應？

直到昨天我遵循得基本方法如下：

聲明屬性：

@property (nonatomic,strong) NSURLConnection *getReportConnection;@property (retain,nonatomic) NSMutableData *receivedData;@property (nonatomic,strong) NSMutableArray *reportArray;

在viewDidLoad中初始化數組：

reportArray=[[NSMutableArray alloc]init];

在按鈕操作中初始化NSURLConnection：

/initialize url that is going to be fetched.NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"****/%@/crash_reasons",ID]];//initialize a request from urlNSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];[request addValue:tokenReceived forHTTPHeaderField:@"**Token"];[request setHTTPMethod:@"GET"];[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];//initialize a connection from requestself.getReportConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

處理收到得數據：

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data{if (connection==_getVersionConnection) {    [self.receivedData_ver appendData:data];    NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    NSError *e = nil;    NSData *jsonData = [responseString dataUsingEncoding:NSUTF8StringEncoding];    NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:jsonData options: NSJSONReadingMutableContainers error: &e];    [JSON[@"app_versions"] enumerateObjectsUsingBlock:^(id obj,NSUInteger idx,BOOL *stop) {        if (![obj[@"id"] isEqual:[NSNull null]] && ![reportArray_ver containsObject:obj[@"id"]]) {            [reportArray_ver addObject:obj[@"id"]];        }        NSLog(@"index = %lu,Object For title Key = %@",(unsigned long)idx,obj[@"id"]);    }];    if (JSON!=nil) {        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Version Reports succesfully retrieved" message:@"" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];        [alert show];    } }}

完成后調用另一個連接：

// This method is used to process the data after connection has made successfully.- (void)connectionDidFinishLoading:(NSURLConnection *)connection{   if (connection==getReportConnection) {             //check and call the connection again    }}

今天,我嘗試使用sendAsync得NSURLConnection一個接一個地使用循環觸發所有連接,并且它工作得很好.

self.receivedData_ver=[[NSMutableData alloc]init];__block NSInteger outstandingRequests = [reqArray count]; for (NSString *URL in reqArray) {    NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:URL]                                                         cachePolicy:NSURLRequestUseProtocolCachePolicy                                                     timeoutInterval:10.0];    [request setHTTPMethod:@"GET"];    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];[NSURLConnection sendAsynchronousRequest:request                                   queue:[NSOperationQueue mainQueue]                       completionHandler:^(NSURLResponse *response,NSData *data,NSError *connectionError) {                           [self.receivedData appendData:data]; //What is the use of appending NSdata into Nsmutable data?                            NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];                           NSError *e = nil;                           NSData *jsonData = [responseString dataUsingEncoding:NSUTF8StringEncoding];                           NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:jsonData options: NSJSONReadingMutableContainers error: &e];                           NSLog(@"login json is %@",JSON);                           [JSON[@"app_versions"] enumerateObjectsUsingBlock:^(id obj,BOOL *stop) {                               if (![obj[@"id"] isEqual:[NSNull null]] && ![reportArray_ver containsObject:obj[@"id"]]) {                                   [reportArray_ver addObject:obj[@"id"]];                               }                               NSLog(@"index = %lu,obj[@"id"]);                           }];                          outstandingRequests--;                           if (outstandingRequests == 0) {                               //all req are finished                               UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Version Reports succesfully retrieved" message:@"" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];                               [alert show];                           }                       }];}

這次花了一半得時間來完成100個請求而不是舊得過程,除了asynReq之外還有更快得方法嗎？.使用NSURLconnection和NSURLConnection與asyncReq得最佳方案是什么？

for (NSString *URL in URLArray) {    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];    // configure the request here    // now issue the request    NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data,NSURLResponse *response,NSError *error) {        // check error and/or handle response here    }];    [task resume];}

dispatch_group_t group = dispatch_group_create();for (NSString *URL in URLArray) {    dispatch_group_enter(group);    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];    // configure the request here    // now issue the request    NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data,NSError *error) {        // check error and/or handle response here        // when all done,leave group        dispatch_group_leave(group);    }];    [task resume];}dispatch_group_notify(group,dispatch_get_main_queue(),^{    // do whatever you want when all of the requests are done});