NSUrlSession-Study

学习NSUrlSession的使用

我的服务器是搭建在本地的,所以可以看到我访问的都是localhost,数据也是写死的

基本使用

//  下面的代码，放进一个按钮点击事件中执行

NSURLSession *session = [NSURLSession sharedSession];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://localhost/studing/1.php"]];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
    NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@", string);
}];
[task resume];

打印的内容,就是http请求所返回的所有内容

next,感受异步

//按钮点击
- (void)buttonRequestAction:(UIButton *)sender
{
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://localhost/studing/1.php"]];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        sleep(3); // 延迟
        NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", string);
    }];
    [task resume];
    
}
// 按钮点击
- (void)otherAction:(UIButton *)sender
{
    NSLog(@"并没有阻塞主线程");
}