网络&热恋NSURLConnection代理及GET￥POST请求

1.NSURLConnection代理下载设置在本地的身骑着白马MP3

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
 
     self.data = [NSMutableData data];
 
     NSString * urlString = @"http://localhost/身骑白马.mp3";
 
     //如果接口中有中文
     urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
 
     NSURL * url = [NSURL URLWithString:urlString];
 
     NSURLRequest * request = [NSURLRequest requestWithURL:url];
 
     NSURLConnection * connect = [NSURLConnection connectionWithRequest:request delegate:self];
 
     //开启网络连接
     [connect start];
 }
 
 //服务器返回响应信息
 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
 
     NSLog(@"%@",response);
 
 }
 
 //接受数据（多次调用）
 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
 
     [self.data appendData:data];
     NSLog(@"%@",data);
 
 }
 
 //请求完成
 - (void)connectionDidFinishLoading:(NSURLConnection *)connection{
 
     [self.data writeToFile:@"/Users/mac/Desktop/身骑白马.mp3" atomically:YES];
     NSLog(@"网络请求完成");
 
 }

2.GET请求

#import "ViewController.h"
 
@interface ViewController ()
 
@end
 
@implementation ViewController
 
- (void)viewDidLoad {
    [super viewDidLoad];
 
    //使用get请求，获取接口
 
    NSString * String = @"http://localhost/login.php";
 
    //拼接参数
    NSString * urlString = [NSString stringWithFormat:@"%@?username=xubaoaichiyu&password=123456",String];
 
    //如果有中文进行转码
 
    urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
 
    NSURL * url = [NSURL URLWithString:urlString];
 
    NSURLRequest * request = [[NSURLRequest alloc]initWithURL:url cachePolicy: timeoutInterval:];
 
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
 
        NSString * string = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
 
        NSLog(@"%@",string);
 
    }];
 
}
 
@end

3.POST请求

#import "ViewController.h"
 
@interface ViewController ()
 
@end
 
@implementation ViewController
 
- (void)viewDidLoad {
    [super viewDidLoad];
 
    //使用post请求
    //获取接口
    NSString * string = @"http://localhost/login.php";
 
    //中文转码
    string = [string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
 
    NSURL * url = [NSURL URLWithString:string];
 
    //可变请求
    NSMutableURLRequest * requst = [[NSMutableURLRequest alloc]initWithURL:url cachePolicy: timeoutInterval:];
 
    //设置传输方式
 
    requst.HTTPMethod = @"POST";
 
    NSString * bodyString = [NSString stringWithFormat:@"username=xubaoaichiyu&password=123456"];
 
    //设置请求体
 
    requst.HTTPBody = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
 
    [NSURLConnection sendAsynchronousRequest:requst queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
 
        NSString * string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
 
        NSLog(@"%@",string);
 
    }];
 
}