GET,POST的同步和异步所有中代码方法

Posted 2020-07-06 钎探穗

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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了GET,POST的同步和异步所有中代码方法相关的知识，希望对你有一定的参考价值。

#pragma GET同步:

//开发中不推荐使用同步网络请求

- (IBAction)getT:(id)sender {//通过storyboard关联得到的方法

//地址字符串

NSString *urlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";

//统一资源定位符(URL)

NSURL *url = [NSURL URLWithString:urlString];

//第一个参数:统一资源定位符(URL)

//第二个参数:缓存策略

//第三个参数:超时时间

NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:(NSURLRequestReloadIgnoringLocalCacheData) timeoutInterval:60.0f];

//NSURLConnection在ios 9.0之后不推荐使用

// 第一个参数: NSURLRequest 类型的对象

// 第二个参数: 存储的是一些网络请求的信息,一般为 nil(包体)

// 第三个参数: 错误信息

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

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

//解析数据

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"dic===%@", dic);

}

NSURLRequestUseProtocolCachePolicy

:基础缓存策略

* NSURLRequestReloadIgnoringLocalCacheData

:忽略本地缓存

* NSURLRequestReloadIgnoringLocalAndRemoteCacheData

:忽略本地缓存,无论本地是否有缓存,都从网络下载

NSURLRequestReloadIgnoringCacheData=NSURLRequestReloadIgnoringLocalCacheData,

:如果本地缓存有效,则不下载,无效则去下载

NSURLRequestReturnCacheDataElseLoad

:优先的使用本地缓存,如果本地没有缓存,则去下载

* NSURLRequestReturnCacheDataDontLoad

:从不下载,只使用本地缓存,如果没有则请求失败.多用于离线环境

** NSURLRequestReloadRevalidatingCacheData

:验证本地数据和网络数据是否相同,如果不同,则去下载,如果相同,则使用本地缓存

#pragma POST同步:

- (IBAction)postT:(id)sender {

NSString *urlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";

NSURL *url = [NSURL URLWithString:urlString];

NSMutableURLRequest *urlrequest = [NSMutableURLRequest requestWithURL:url];

//创建一个字符串

NSString *dataString = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";

//把这个字符串转换成NSData类型的对象

NSData *postData = [dataString dataUsingEncoding:NSUTF8StringEncoding];

//设置请求方式方式为大写如:POST GET

//GET请求可以不设置,但是POST请求必须设置

[urlrequest setHTTPMethod:@"POST"];

//把需要上传的data放进urlrequest里边

[urlrequest setHTTPBody:postData];

NSData *resultData = [NSURLConnection sendSynchronousRequest:urlrequest returningResponse:nil error:nil];

NSDictionary *dic1 = [NSJSONSerialization JSONObjectWithData:resultData options:(NSJSONReadingAllowFragments) error:nil];

NSLog( @"dic1====%@",dic1);

}

#pragma GET异步:

//第一种:

- (IBAction)getY:(id)sender {

NSString *string = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?";

NSURL *url = [NSURL URLWithString:string];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

//调用带有block回调的方法,执行网络请求

//第一个参数:NSURLRequest

//第二个参数:block块里边的代码在哪个线程执行

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

//response 携带的是接口的一些信息

//data 请求下来的数据,需要使用的

//connectionnnError 错误信息

if (connectionError == nil) {

NSDictionary *dic2 = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"dic2====%@",dic2);

//这里应该刷新UI

//1;给数据源数组赋值

//2;赋值结束后,刷新UI([self.tableview reloadData])

}

}];

}

//第二种方法

- (IBAction)get:(id)sender {

// 使用block回调的方式

// 使用系统提供的全局的NSURLSession对象,是一个单例

NSURLSession *session = [NSURLSession sharedSession];

NSString *string = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";

NSURL *url = [NSURL URLWithString:string];

//NSURLSession是基于任务的,所以所有的东西都要放到任务里边, NSURLSessionTask就是 NSURLSession的任务执行对象

NSURLSessionTask *task = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

if (error == nil) {

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"dic===%@", dic);

}

}];

// NSURLSession的所有任务默认是挂起的,所以一定要调用resume方法,让任务开始

[task resume];

}

//第三种方法遵循NSURLSessionDataDelegate NSURLSession获取网络数据的代理协议

//NSURLSession代理的异步操作

//NSURLSession代理人的属性是只读的

//第一个参数:会话模式

//第二个参数:代理人

//第三个参数:代理方法在那个线程中进行

NSURLSession *session1 = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];

NSURL *url = [NSURL URLWithString:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213"];

//NSURLSessionDataTask的子类对象

NSURLSessionDataTask *dataTask = [session1 dataTaskWithURL:url];

[dataTask resume];

}

// 服务器开始响应

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler {

completionHandler(NSURLSessionResponseAllow);

self.resultdata = [NSMutableData data];

}

// 接收到数据

- (void)URLSession:(NSURLSession *)session dataTask:(nonnull NSURLSessionDataTask *)dataTask didReceiveData:(nonnull NSData *)data {

[self.resultdata appendData:data];

}

// 结束响应

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {

if (error == nil) {

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:self.resultdata options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"Dictionary = %@", dict);

}

//第四种方法: 遵循NSURLConnectionDataDelegate协议

#pragma POST异步:

//第一种: 遵循NSURLConnectionDataDelegate协议

- (IBAction)postY:(id)sender {

NSString *string = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?";

NSURL *url = [NSURL URLWithString:string];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[NSURLConnection connectionWithRequest:request delegate:self];

NSString *datastr = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";

NSData *postdata = [datastr dataUsingEncoding:NSUTF8StringEncoding];

[request setHTTPMethod:@"POST"];

[request setHTTPBody:postdata];

}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{

self.resultData = [NSMutableData data];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{

[self.resultData appendData:data];

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection{

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:_resultData options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"%@", dic);

}

//第二种:session

- (IBAction)post:(id)sender {

NSURLSession *session = [NSURLSession sharedSession];

NSString *str = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?";

NSURL *url = [NSURL URLWithString:str];

NSMutableURLRequest *urlrequest = [NSMutableURLRequest requestWithURL:url];

NSString *datastring = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";

NSData *pdata = [datastring dataUsingEncoding:NSUTF8StringEncoding];

[urlrequest setHTTPMethod:@"POST"];

[urlrequest setHTTPBody:pdata];

NSURLSessionTask *task = [session dataTaskWithRequest:urlrequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

if (error == nil) {

NSDictionary *dic1 = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingAllowFragments) error:nil];

NSLog(@"%@", dic1);

}

}];

[task resume];

}

//第三种:

- (IBAction)postT:(id)sender {

NSString *urlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";

NSURL *url = [NSURL URLWithString:urlString];

NSMutableURLRequest *urlrequest = [NSMutableURLRequest requestWithURL:url];