IOS中get同步异步请求与post同步异步请求

#import "ViewController.h"
@interface ViewController ()
@property(nonatomic,strong)UITextView *textView;
@property(nonatomic,copy)NSString *BASE_URL;
@property(nonatomic,copy)NSString *BASE_URL1_PARAM;
@property(nonatomic,strong)NSMutableData *mutableData;
@end
@implementation ViewController

(void)viewDidLoad {
[super viewDidLoad];



// Do any additional setup after loading the view, typically from a nib.

 
}
pragma mark - get同步

(IBAction)getSyncButtonAction:(UIButton *)sender

{

NSString * BASE_URL= @"www.baidu.com";

//1.准备URL地址

NSURL *url = [NSURL URLWithString:BASE_URL];



//2.准备请求对象

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];



//2.1设置请求方式

[request setHTTPMethod:@"GET"];



//3.准备返回结果

NSURLResponse *response = nil;

NSError *error = nil;



//4.创建链接对象,并发送请求,并获取结果(需要的数据)

NSData *data =  [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];



//5.打印获取到的一些信息

NSLog(@"结果类型:%@",response.MIMEType);

NSLog(@"请求的网址:%@",response.URL);

NSLog(@"结果长度:%lld",response.expectedContentLength);

NSLog(@"请求到的结果:%@",data);



//6.解析文件

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];



//7.显示在textView里

self.textView.text = [NSString stringWithFormat:@"%@",dict];



 
}
pragma mark - get异步

(IBAction)getAsyncButtonAction:(UIButton *)sender

{

//1.准备url地址

NSURL *url = [NSURL URLWithString:_BASE_URL];

//2.创建请求对象

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

//3.创建链接对象,发送请求

[NSURLConnection connectionWithRequest:request delegate:self];



 
}
pragma mark - POST同步

(IBAction)postSyncButtonAction:(UIButton *)sender

{

//1.准备网址

NSURL *url = [NSURL URLWithString:_BASE_URL];



//2.准备请求对象

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];



//2.1设置请求方式

[request setHTTPMethod:@"POST"];



//2.2设置请求参数

 
warning 设置请求参数,需要的是NSData类型

NSData *param = [_BASE_URL1_PARAM dataUsingEncoding:NSUTF8StringEncoding];

[request setHTTPBody:param];



//3.创建链接对象,并发送请求,获取结果

NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];



//4.解析

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];



//5.显示

self.textView.text = [NSString stringWithFormat:@"%@",dict];

 
}
pragma mark - POST异步

(IBAction)postAsyncButtonAction:(UIButton *)sender

{

__block ViewController *weakSelf = self;



//1.准备地址

NSURL *url = [NSURL URLWithString:_BASE_URL];

//2.创建请求对象,并设置请求方法和参数

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request setHTTPMethod:@"POST"];

[request setHTTPBody:[_BASE_URL1_PARAM dataUsingEncoding:NSUTF8StringEncoding]];



//3.创建链接对象,发送请求,在block内部完成分析

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue new]  completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

    //NSLog(@"%@",data);



    //4.解析

    NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];



    //5.回到主线程,进行更新页面

    dispatch_sync(dispatch_get_main_queue(), ^{

        weakSelf.textView.text = [NSString stringWithFormat:@"%@",dict];

    });



}];







 
}
pragma mark - 清除

(IBAction)clearButtonAction:(UIButton *)sender

{

_textView.text = nil;

 
}
pragma mark - 实现协议方法
pragma mark 开始接收请求结果

(void)connection:(NSURLConnection )connection didReceiveResponse:(NSURLResponse )response

{

//初始化

self.mutableData = [NSMutableData data];

 
}
pragma mark - 接收数据

(void)connection:(NSURLConnection )connection didReceiveData:(NSData )data

{

//拼接接收到的数据

[self.mutableData appendData:data];



 
}
pragma makr - 接收完毕

(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

//解析

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:_mutableData options:NSJSONReadingAllowFragments error:nil];

_textView.text = [NSString stringWithFormat:@"%@",dict];

 
}
pragma mark - 接收错误

(void)connection:(NSURLConnection )connection didFailWithError:(NSError )error

{
}- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

 
}
@end
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