iOS使用Get和Post访问服务器数据

一.准备工作

利用本机作为服务器，提供好相应的文件

hello.php里面的内容

//Get方式
<?PHP
    #获取用户输入的姓名和密码
    $name = $_GET["name"];
    $pwd = $_GET["password"];

    $user = array(
             "name"=>$name,
             "password"=>$pwd,
    );

    $result = array($user,$user,$user);

    header('Content-Type:application/json');
    echo json_encode($result);
?>

//Post方式
<?PHP
    #获取用户输入的姓名和密码
    $name = $_POST["name"];
    $pwd = $_POST["password"];
    
    $user = array(
             "name"=>$name,
             "password"=>$pwd,
    );

    header('Content-Type:application/json');
    echo json_encode($result);
?>

二.iOS使用Get方式向服务端发送请求并接受服务端返回的数据

info.plist文件加入：

1.设置请求路径-构造数据在服务器上的位置-服务器提供的API

NSString *urlString = @"http://127.0.0.1/hello.php?name=jack&password=123";

NSURL *url = [NSURL URLWithString:urlString];

2.创建请求对象

NSURLRequest *request=[NSURLRequest requestWithURL:url];

3.发起异步的连接，接受服务端返回的数据

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        
        NSLog(@"%ld",data.length);
        
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        
        NSLog(@"%@",result);
}];

4.打印结果

[
     {"name":"jack","password":"123"},
     {"name":"jack","password":"123"},
     {"name":"jack","password":"123"}
]

注意：NSData提供了一个方法将NSURL->NSData

NSData *data = [NSData dataWithContentsOfURL:url];

三.iOS使用Post方式向服务端发送请求并接受服务端返回的数据

info.plist文件加入：

1.设置请求路径-构造数据在服务器上的位置-服务器提供的API

NSString *urlString = @"http://127.0.0.1/hello.php";

NSURL *url = [NSURL URLWithString:urlString];

2.创建请求对象

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

3.设置请求的方式，默认是Get

request.HTTPMethod = @"POST";

4.设置请求体

NSString *bodyStr=[NSString stringWithFormat:@"name=jack&password=123"];
    
request.HTTPBody=[bodyStr dataUsingEncoding:NSUTF8StringEncoding];

5.发起异步的连接，接受服务端返回的数据

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        
        NSLog(@"%ld",data.length);
        
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        
        NSLog(@"%@",result);
}];

6.打印结果

[
     {"name":"jack","password":"123"},
     {"name":"jack","password":"123"},
     {"name":"jack","password":"123"}
]

四.JSON数据转模型

//模型类
#import <Foundation/Foundation.h>

@interface UserModel : NSObject
    
@property (nonatomic,strong) NSString *name;

@property (nonatomic,strong) NSString *password;

@end

//初始化一个可变数组存放模型变量
NSMutableArray *modelsArray = [NSMutableArray array];
    
 //数据转模型
 for (NSDictionary *dic in array) {

     UserModel *model = [UserModel new];

     //自己解析
     model.name = [dic objectForKey:@"name"];
     model.password = [dic objectForKey:@"password"];

     //系统自带的
     //[model setValuesForKeysWithDictionary:dic];

     //MJExtension

     //添加
     [modelsArray addObject:model];
 }

打印JSON数据转模型数据结果

 (
    "<UserModel: 0x60c0000357a0>",
    "<UserModel: 0x60c0000354a0>",
    "<UserModel: 0x60c000035560>"
)

参考文章：
http://www.cnblogs.com/wendingding/p/3813706.html

demo链接
https://pan.baidu.com/s/15LVbJOlTZqcpZJDKOaqZng
密码:d8un