Question

当我按下按钮时，它会调用function1。只有当我多次按下按钮时，function1 sendAsynchronousRequest才有效。否则，在它第一次调用时，它内部的代码不会被调用。

我怎样才能让它发挥作用？它的原因是什么？谢谢。

-(BOOL)function1{
    ....
    theRequest = [[NSMutableURLRequest alloc]initWithURL:locationOfWebService];

    NSString *msgLength = [NSString stringWithFormat:@"%d",[soapFormat length]];

    [theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue:@"http://tempuri.org/IsAuthenticatedNA" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    //the below encoding is used to send data over the net
    [theRequest setHTTPBody:[soapFormat dataUsingEncoding:NSUTF8StringEncoding]];

    [NSURLConnection sendAsynchronousRequest:theRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
        if (data){
           result=TRUE;

        }
        else if (error)
            NSLog(@"%@",error);
            result=FALSE;
    }];

    return result;
}

-(IBAction)login:(id)sender{
    BOOL m=[self function1];
     if(m){
       //do something 
     }else{
       //do something
     }
}

Answer 1

试试这个。

-(void)function1{
    ....
    theRequest = [[NSMutableURLRequest alloc]initWithURL:locationOfWebService];

    NSString *msgLength = [NSString stringWithFormat:@"%d",[soapFormat length]];

    [theRequest addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue:@"http://tempuri.org/IsAuthenticatedNA" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue:msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    //the below encoding is used to send data over the net
    [theRequest setHTTPBody:[soapFormat dataUsingEncoding:NSUTF8StringEncoding]];

    [NSURLConnection sendAsynchronousRequest:theRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
        if (data){
           //get the value of result as BOOL
           if(/* BOOL is YES */){
               //do something 
           }else{
               //do something
           }
        }
        else if (error)
            NSLog(@"%@",error);
    }];
}

-(IBAction)login:(id)sender{
    [self function1];
}

代码第一次没有进入sendAsynchronousRequest方法

1 个答案: