Get和post网络请求

#import "ViewController.h"

@interface ViewController ()<NSURLSessionDelegate>
- (IBAction)asynAction:(id)sender;
- (IBAction)synProtocolGET:(id)sender;
- (IBAction)synProtocolPOST:(id)sender;
- (IBAction)synGETblock:(id)sender;
- (IBAction)synPOSTblock:(id)sender;

@property(nonatomic,retain)UIImageView *imageView;
//用来接受返回的data数据
@property(nonatomic,retain)NSMutableData *data;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.imageView=[[UIImageView alloc] initWithFrame:CGRectMake(100, 500, 200, 200)];
[self.view addSubview:self.imageView];
self.imageView.backgroundColor=[UIColor cyanColor];

}

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

- (IBAction)asynAction:(id)sender {

NSString *urlStr=@"http://img4.duitang.com/uploads/item/201207/28/20120728105310_jvAjW.thumb.600_0.jpeg";
NSURL *url=[NSURL URLWithString:urlStr];
NSData *data=[NSData dataWithContentsOfURL:url];
//    NSLog(@"%@",data);
//    NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
//    NSLog(@"%@",dic);

self.imageView.image=[UIImage imageWithData:data];

}

//NSURLSession是session的代理方法
//NSURLSession的使用和NSURLConnection的使用基本相似,他在7.0以后出现,主要是为了提高NSURLConnection的性能,它提供下载等功能
//Session可以通过协议和block两种方式进行使用
- (IBAction)synProtocolGET:(id)sender {

NSString *urlStr=@"http://api.map.baidu.com/place/v2/search?query=银行®ion=大连&output=json&ak=6E823f587c95f0148c19993539b99295";

//url由字母和数字,特殊符号,比如/,&,?,=,$组成,所以一般的url里是没有汉字的,所有的汉字在请求的时候需要给他进行转码
//ios9.0以后,转码的方法也发生了变化,采用字符集合的方式对网址进行转码操作
urlStr=[urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:urlStr]];
//    NSLog(@"%@",urlStr);

// NSString ->NSURL
NSURL *url=[NSURL URLWithString:urlStr];

//创建NSURLSession对象
NSURLSession *session=[NSURLSession sessionWithConfiguration: [NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];

//创建一个请求对象
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];

//创建一个Session的tast任务对象
NSURLSessionDataTask *task=[session dataTaskWithRequest:request];

//任务执行
[task resume];
}

//完成网络请求,一般使用3个协议方法
//694行
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask
didReceiveResponse:(NSURLResponse *)response
completionHandler:(void (^)(NSURLSessionResponseDisposition disposition))completionHandler{
//方法会把请求的服务器响应信息返回,就是response,这里面能查看响应码status code,200是请求成功,404没有像找到对应的页面,response可以查看这个网址是否在正确的信息
//    NSLog(@"%@",response);

//服务器响应之后,需要允许服务器响应,才可以继续接受从服务器返回的数据,方法里第四个参数block就是做这个功能的
completionHandler(NSURLSessionResponseAllow);

//当手机与服务器都允许之后,初始化self.data,用来接收数据
self.data=[NSMutableData data];

}

//用来接收数据的协议方法,在接收数据的过程中,这个方法会被调用多次,直到数据全部接受完成
//728行
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask
didReceiveData:(NSData *)data{
//只要执行这个方法,会把数据data返回,我们在这个方法里需要做的,就是把方法data全部进行累加,等到最后一个数据请求下来之后,所有数据累加到一起,完成请求过程
[self.data appendData:data];
}

//675行
//这个协议方法一般会在完成请求或者请求失败时触发,区分的话就是error,如果请求成功,error是没有值得
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task
didCompleteWithError:(nullable NSError *)error{
NSLog(@"%@",error);

if (error==nil) {
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:self.data options:0 error:nil];
NSLog(@"%@",dic);

}else{
NSLog(@"请求失败");
}
}

- (IBAction)synProtocolPOST:(id)sender {
NSString *strURL=@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&a
4000
mp;startRecord=1&len=15&udid=1234567890&terminalType=Iphone&cid=213";
NSURL *url=[NSURL URLWithString:strURL];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
//设置当前请求方式
//请求方式默认是GET
//PUT,DELETE
[request setHTTPMethod:@"POST"];
NSString *bodyStr=@"username=daka&pwd=123";
NSData *bodyData=[bodyStr dataUsingEncoding:NSUTF8StringEncoding];
//加到请求中
[request setHTTPBody:bodyData];
}

- (IBAction)synGETblock:(id)sender {
NSString *strURL=@"http://project.lanou3g.com/teacher/yihuiyun/lanouproject/movielist.php";
NSURL *url=[NSURL URLWithString:strURL];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
//创建一个session对象
NSURLSession *session=[NSURLSession sharedSession];
//根据session对象,创建一个任务task
NSURLSessionTask *task=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@",response);
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"%@",dic);
}];

//任务必须手动去执行
[task resume];

}

- (IBAction)synPOSTblock:(id)sender {

NSString *strURL=@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=15&udid=1234567890&terminalType=Iphone&cid=213";
NSURL *url=[NSURL URLWithString:strURL];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
NSString *bodyStr=@"username=daka&pwd=123";
NSData *bodyData=[bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:bodyData];
NSURLSession *session=[NSURLSession sharedSession];
NSURLSessionTask *task=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"%@",dic);
}];

[task resume];

}

#import <Foundation/Foundation.h>

@interface Movie : NSObject

@property(nonatomic,copy)NSString *movieName;

@end

#import "Movie.h"

@implementation Movie

-(void)setValue:(id)value forUndefinedKey:(NSString *)key{

}
@end

#import "ViewController.h"
#import "Movie.h"

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>

@property(nonatomic,retain)NSMutableArray *arr;
@property(nonatomic,retain)UITableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

self.tableView=[[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStylePlain];
[self.view addSubview:self.tableView];
self.tableView.delegate=self;
self.tableView.dataSource=self;
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"reuse"];
[self createData];

NSLog(@"%@",NSHomeDirectory());
}

-(void)createData{
NSString *strURL=@"http://project.lanou3g.com/teacher/yihuiyun/lanouproject/movielist.php";
NSURL *url=[NSURL URLWithString:strURL];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url];
//    [request setHTTPMethod:@"POST"];
//    NSString *bodyStr=@"username=daka&pwd=123";
//    NSData *bodyData=[bodyStr dataUsingEncoding:NSUTF8StringEncoding];
//    [request setHTTPBody:bodyData];
NSURLSession *session=[NSURLSession sharedSession];
NSURLSessionTask *task=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

//数据在子线程里请求,但是还是需要在主线程里 显示,所以需要把请求到的放到主线程里显示
dispatch_queue_t mainQuenue=dispatch_get_main_queue();
dispatch_async(mainQuenue, ^{
//在这里面写数据的处理
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
self.arr=[NSMutableArray array];
for (NSDictionary *temp in dic[@"result"]) {
Movie *movie=[[Movie alloc] init];
[movie setValuesForKeysWithDictionary:temp];
[self.arr addObject:movie];
}

//刷新
[self.tableView reloadData];

});

}];
[task resume];

}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.arr.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"reuse" forIndexPath:indexPath];
Movie *movie=self.arr[indexPath.row];
cell.textLabel.text=movie.movieName;
return cell;
}