服务器采用的是webservice的方式，这种数据要请求下来是比较麻烦的，总体思路是把带有参数的XML数据拼接成字符串作为请求的Body，然后按照常规的网络请求数据的方法把数据拿下来，此时获取的数据也是XML格式的，需要对其进行解析获取对应标签对应的数据，这个数据才是最终我们需要的数据。
请求参数：（蓝色的地方是放参数的）
返回参数：
下边是请求数据的代码：
#import "ViewController.h"
#import "XMLDictionary.h"
@interface ViewController ()
@property (nonatomic,strong)NSMutableData *webData;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSString *soapMsg = [NSString stringWithFormat:
@""
"
"xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
"xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "
"xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\">"
""
""
"%@"
"%@"
"%@"
""
""
"", @"json",@"System",@"abc"];
//创建URL
NSURL *url = [NSURL URLWithString:@"http://192.168.0.254:82/PhoneService.asmx"];
NSURL *msgLength = [NSString stringWithFormat:@"%lu",(unsigned long)[soapMsg length]];
//根据URL创建一个请求
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//添加请求的详细信息，与请求报文前半部分对应
[request addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
[request addValue:msgLength forHTTPHeaderField:@"Content-Length"];
//设置请求方式、
[request setHTTPMethod:@"POST"];
//将soap请求加到消息中
[request setHTTPBody:[soapMsg dataUsingEncoding:NSUTF8StringEncoding ]];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSString *str =[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *dict = [NSDictionary dictionaryWithXMLString:str];
NSLog(@"====%@",dict);
}];
[dataTask resume ];
// Do any additional setup after loading the view, typically from a nib.
}
@end
