复习知识点:XML解析数据,JOSN解析数据,GET请求数据,POST请求数据

GDataXMLDocument-XML解析
 1 #pragma mark - ======== Dom XML解析
 2 - (IBAction)domParserActionXML_Document:(id)sender {
 3     
 4     // 第一步 引入动态库
 5     // 1 获取文件路径
 6     NSString *Path = [[NSBundle mainBundle] pathForResource:@"StudentIfor_xml" ofType:@"txt"];
 7     // 2.根据路经获取data类型数据
 8     NSData *data = [NSData dataWithContentsOfFile:Path];
 9     // 2.1 初始化存储数据的数组
10     self.dataArray = [NSMutableArray array];
11     // 3.设置dom解析(创建解析文档)
12     GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithData:data options:0 error:nil];
13     // 4.获取根节点
14     GDataXMLElement *rootElement = document.rootElement;
15     // 5.遍历获取相对应的子节点
16     for (GDataXMLElement *studentElement in rootElement.children) {
17 //        NSLog(@"studentelement %@", studentElement);
18         Student *student = [[Student alloc] init];
19         // 遍历子节点的子节点
20         for (GDataXMLElement *stuElement in studentElement.children) {
21 //            NSLog(@"stuelement %@", stuElement);
22             
23         // 根据标签给student对象赋值
24         // stuElement.name 标签的名字
25         // stuElement.stringValue 标签的值
26             // KVC赋值
27             [student setValue:stuElement.stringValue forKey:stuElement.name];
28         }
29         [self.dataArray addObject:student];
30     }
31     // 遍历检验
32     for (Student *stu in self.dataArray) {
33         NSLog(@"name = %@ gender = %@ age = %ld hobby = %@", stu.name, stu.gender, stu.age, stu.hobby);
34     }
35 }

系统自带的JSON解析

 1 #pragma mark - 系统自带的JSON数据解析
 2 - (IBAction)foundationParserActionJSONDocument:(id)sender {
 3     // 1.获取文件路径
 4     NSString *path = [[NSBundle mainBundle] pathForResource:@"StudentInfor_json" ofType:@"txt"];
 5     // 2.根据路径获取NSData
 6     NSData *data = [NSData dataWithContentsOfFile:path];
 7     // 2.5 对存储数据的数组初始化
 8     self.dataArray = [NSMutableArray array];
 9     // 3.解析
10     NSArray *dataArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
11     
12 #pragma mark - jsonkit解析JSON数据解析  与系统自带的只差这一句
13 //    NSArray *dataArray = [data objectFromJSONData];
14     
15     // 遍历数组 KVC赋值
16     for (NSDictionary *Dic in dataArray) {
17         Student *stu = [[Student alloc] init];
18         // 将字典的值赋值给对象
19         [stu setValuesForKeysWithDictionary:Dic];
20         // 将对象添加到数组中
21         [self.dataArray addObject:stu];
22     }
23     for (Student *stu in self.dataArray) {
24        NSLog(@"name = %@ gender = %@ age = %ld hobby = %@", stu.name, stu.gender, stu.age, stu.hobby);
25     }
26 }

 GET异步请求

#pragma mark - get 异步请求
- (IBAction)getRequest:(id)sender {
    // Block 实现
    // 创建url
    NSURL *url = [NSURL URLWithString:GET_URL];
    // 创建session对象
    NSURLSession *session = [NSURLSession sharedSession];
    // 创建task请求任务
    // NSURLSession 是基于任务去完成相关的事件的
    // NSURLSessionTask 所有的任务均放在这个里面实现
    NSURLSessionDataTask *task = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        // 解析相关的数据
        if (nil == error) {
            NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
            NSLog(@"%@",dic);
        }
    }];
    // 核心步:启动任务 (千万不能忘记)
    // NSURLSessionTask 实出来后处于挂起状态,如果不启动他永远不会走Block中的实现内容
    [task resume];
}

POST异步请求

 1 #pragma mark - post 异步请求
 2 - (IBAction)postRequest:(id)sender {
 3     // 创建url
 4     NSURL *url = [NSURL URLWithString:POST_URL];
 5     // 创建请求
 6     NSMutableURLRequest *mutableRequset = [NSMutableURLRequest requestWithURL:url];
 7     // 核心设置body
 8     NSString *bodyString = POST_BODY;
 9     NSData *postData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
10     [mutableRequset setHTTPMethod:@"POST"];
11     [mutableRequset setHTTPBody:postData];
12     
13     // 创建session
14     NSURLSession *session = [NSURLSession  sharedSession];
15     NSURLSessionDataTask *task = [session dataTaskWithRequest:mutableRequset completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
16         // 解析
17         if (nil == error) {
18             NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
19             NSLog(@"%@", dic);
20         }
21     }];
22     // 启动任务
23     [task resume];
24 }
原文地址:https://www.cnblogs.com/crazygeek/p/5537797.html