使用SOAP SOAP服务

Question

您好，我正在尝试实现一个SOAP调用，使用一个示例：

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString  *textFieldCelcisus = @"0";
    NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
                             "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n"
                             "<soap:Body>\n"
                             " <CelsiusToFahrenheit xmlns=\"http://tempuri.org/\">\n"
                             "<Celsius>%@</Celsius>\n"
                             "</CelsiusToFahrenheit>\n"
                             "</soap:Body>\n"
                             "</soap:Envelope>\n" ,textFieldCelcisus];

    NSURL *url = [NSURL URLWithString:@"http://w3schools.com/webservices/tempconvert.asmx"];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
    NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]];

    [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue: @"http://www.w3schools.com/webservices/CelsiusToFahrenheit" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

    NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

    if( theConnection )
    {
        NSLog(@"Ok");
    }
    else
    {
        NSLog(@"theConnection is NULL");
    }
    // Do any additional setup after loading the view, typically from a nib.
}

在控制台上是说"Ok"，但是如果我放了一个错误的url，它仍然是"Ok“，我不明白为什么。

编辑

更新，我做了委托方法，我看不到错误，但消息仍然是"Ok“

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController


- (void)viewDidLoad {


    receivedData = [NSMutableData dataWithCapacity: 0];

    [super viewDidLoad];


    NSString  *textFieldCelcisus = @"0";
    NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
                             "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n"
                             "<soap:Body>\n"
                             " <CelsiusToFahrenheit xmlns=\"http://tempuri.org/\">\n"
                             "<Celsius>%@</Celsius>\n"
                             "</CelsiusToFahrenheit>\n"
                             "</soap:Body>\n"
                             "</soap:Envelope>\n" ,textFieldCelcisus];

    NSURL *url = [NSURL URLWithString:@"http://w3schools.com/webservices/tempconvert.asmx"];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
    NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]];

    [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue: @"http://www.w3schools.com/webservices/CelsiusToFahrenheit" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

    theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    if( theConnection ) //pointer returned from the [[NSURLConnection  alloc] init]
    {
        NSLog(@"Ok");//as long as the initializer returns not nil, this will print.
    }
    else
    {
        NSLog(@"theConnection is NULL");
    }
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    // This method is called when the server has determined that it
    // has enough information to create the NSURLResponse object.

    // It can be called multiple times, for example in the case of a
    // redirect, so each time we reset the data.

    // receivedData is an instance variable declared elsewhere.
    [receivedData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // Append the new data to receivedData.
    // receivedData is an instance variable declared elsewhere.
    [receivedData appendData:data];
}

- (void)connection:(NSURLConnection *)connection
  didFailWithError:(NSError *)error
{
    // Release the connection and the data object
    // by setting the properties (declared elsewhere)
    // to nil.  Note that a real-world app usually
    // requires the delegate to manage more than one
    // connection at a time, so these lines would
    // typically be replaced by code to iterate through
    // whatever data structures you are using.
    theConnection = nil;
    receivedData = nil;

    // inform the user
    NSLog(@"Connection failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // do something with the data
    // receivedData is declared as a property elsewhere
    NSLog(@"Succeeded! Received %lu bytes of data",(unsigned long)[receivedData length]);

    // Release the connection and the data object
    // by setting the properties (declared elsewhere)
    // to nil.  Note that a real-world app usually
    // requires the delegate to manage more than one
    // connection at a time, so these lines would
    // typically be replaced by code to iterate through
    // whatever data structures you are using.
    theConnection = nil;
    receivedData = nil;
}



- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

Answer 1

您的逻辑是查看"theConnection“是否是有效的指针。

NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    if( theConnection ) //pointer returned from the [[NSURLConnection  alloc] init]
    {
        NSLog(@"Ok");//as long as the initializer returns not nil, this will print.
    }
    else
    {
        NSLog(@"theConnection is NULL");
    }

您将需要为NSURLConnection实现委托方法，以查看请求的结果。https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/URLLoadingSystem/Tasks/UsingNSURLConnection.html

连接:didFailWithError：

连接:didReceiveData：

connectionDidFinishLoading：

等等。