- (void)loadWebRequest:(id)sender { NSURL *url=[NSURL URLWithString:@"http://localhost:8080/getAllStudent"]; NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url]; [request setHTTPMethod:@"GET"]; NSURLConnection *connection=[[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection start]; ....}

NSURLSession *session=[NSURLSession sharedSession]; NSURLSessionTask *dataTask=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { .... //相关代码逻辑 }

//// UserInfoViewController.m// iMooc//// Created by 曹城华 on 2017/4/30.// Copyright ? 2017年 曹城华. All rights reserved.//#import "UserInfoViewController.h"#define kScreenWidth [[UIScreen mainScreen] bounds].size.width#define kScreenHeight [[UIScreen mainScreen] bounds].size.height// 遵循的协议，协议里面定义了一些方法 NSURLConnectionDataDelegate --> <NSURLConnectionDataDelegate>@interface UserInfoViewController (){ //变量 //NSMutableData *receiveData_;}@end@implementation UserInfoViewController- (void)viewDidLoad { [super viewDidLoad]; // viewcontroller 下的--->view [self.view setBackgroundColor:[UIColor whiteColor]]; UILabel *titleLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 40, kScreenWidth, 20)]; [titleLabel setText:@"个人信息展示"]; titleLabel.backgroundColor=[UIColor clearColor]; titleLabel.textAlignment=NSTextAlignmentCenter; titleLabel.font=[UIFont systemFontOfSize:18]; [self.view addSubview:titleLabel]; _userNameView=[[KeyValueView alloc] initWithFrame:CGRectMake(100, 70, kScreenWidth-100*2, 30)]; _userNameView.backgroundColor=[UIColor clearColor]; [self.view addSubview:_userNameView]; _userSexView=[[KeyValueView alloc] initWithFrame:CGRectMake(100, 70+30, kScreenWidth-100*2, 30)]; _userSexView.backgroundColor=[UIColor clearColor]; [self.view addSubview:_userSexView]; _birthdayView=[[KeyValueView alloc] initWithFrame:CGRectMake(100, 70+30*2, kScreenWidth-100*2, 30)]; _birthdayView.backgroundColor=[UIColor clearColor]; [self.view addSubview:_birthdayView]; _emailView=[[KeyValueView alloc] initWithFrame:CGRectMake(100, 70+30*3, kScreenWidth-100*2, 30)]; _emailView.backgroundColor=[UIColor clearColor]; [self.view addSubview:_emailView]; _phoneView=[[KeyValueView alloc] initWithFrame:CGRectMake(100, 70+30*4, kScreenWidth-100*2, 30)]; _phoneView.backgroundColor=[UIColor clearColor]; [self.view addSubview:_phoneView]; UIButton *getUserInfoButton=[[UIButton alloc] initWithFrame:CGRectMake(100, 70+30*5, kScreenWidth-100*2, 30)]; getUserInfoButton.backgroundColor=[UIColor redColor]; [getUserInfoButton setTitle:@"GetRequest" forState:UIControlStateNormal]; [getUserInfoButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; //loadWebRequest: 冒号表示带有入参 [getUserInfoButton addTarget:self action:@selector(loadWebRequest:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:getUserInfoButton]; // Do any additional setup after loading the view.}////网络请求的响应结果//- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {// NSLog(@"%@",response);//}//////接收网络响应数据， 多次调用//- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {// if (receiveData_==nil) {// receiveData_=[[NSMutableData alloc] init];// }// [receiveData_ appendData:data];//// NSLog(@"%@",data);//}////- (void)connectionDidFinishLoading:(NSURLConnection *)connection {// NSLog(@"网络请求结束");// id obj=[NSJSONSerialization JSONObjectWithData:receiveData_ options:0 error:nil];// NSLog(@"%@",obj);// if ([obj isKindOfClass:[NSDictionary class]]) {// id userInfo=[(NSDictionary *)obj objectForKey:@"items"];// NSDictionary *item=[(NSArray *)userInfo objectAtIndex:[userInfo count]-1];// // NSString *userName=[(NSDictionary *)item objectForKey:@"name"];// NSLog(@"%@",userName);// // NSString *userAge=[(NSDictionary *)item objectForKey:@"age"];// NSLog(@"%@",userAge);// // NSString *userId=[(NSDictionary *)item objectForKey:@"id"];// NSLog(@"%@",userId);// // NSString *userMobole=[(NSDictionary *)item objectForKey:@"mobile"];// NSLog(@"%@",userMobole);// // NSString *userSex=[(NSDictionary *)item objectForKey:@"sex"];// if ([userSex isKindOfClass:[NSString class]]) {// NSLog(@"aaaaa");// }// if ([userSex isKindOfClass:[NSNumber class]]) {// NSLog(@"bbbbb");// }// // //怎么会变成NSNumber类型了// if ([userSex intValue]==1) {// userSex=@"男";// }// if ([userSex isEqual:[NSNumber numberWithInt:0]]) {// userSex=@"女";// }// NSLog(@"%@",userSex);//// }//}- (void)loadWebRequest:(id)sender { NSURL *url=[NSURL URLWithString:@"http://localhost:8080/getAllStudent"]; NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:url]; [request setHTTPMethod:@"GET"]; NSURLConnection *connection=[[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection start]; //resume 名词 简历 动词 【继续】 NSURLSession *session=[NSURLSession sharedSession]; NSURLSessionTask *dataTask=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { id obj=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; NSLog(@"%@",obj); if ([obj isKindOfClass:[NSDictionary class]]) { id userInfo=[(NSDictionary *)obj objectForKey:@"items"]; NSDictionary *item=[(NSArray *)userInfo objectAtIndex:[userInfo count]-1]; NSString *userName=[(NSDictionary *)item objectForKey:@"name"]; NSLog(@"%@",userName); NSString *userAge=[(NSDictionary *)item objectForKey:@"age"]; NSLog(@"%@",userAge); NSString *userId=[(NSDictionary *)item objectForKey:@"id"]; NSLog(@"%@",userId); NSString *userMobole=[(NSDictionary *)item objectForKey:@"mobile"]; NSLog(@"%@",userMobole); NSString *userSex=[(NSDictionary *)item objectForKey:@"sex"]; if ([userSex isKindOfClass:[NSString class]]) { NSLog(@"aaaaa"); } if ([userSex isKindOfClass:[NSNumber class]]) { NSLog(@"bbbbb"); } //怎么会变成NSNumber类型了 if ([userSex intValue]==1) { userSex=@"男"; } if ([userSex isEqual:[NSNumber numberWithInt:0]]) { userSex=@"女"; } NSLog(@"%@",userSex); } }]; [dataTask resume]; }- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller.}*/@end