通过代理实现网络请求@interface ViewController ()<NSURLConnectionDataDelegate>
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
//1.确定请求路径
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.设置代理,发送请求（三种实现的方式、根据实际开发需求选择）
//3.1
//[NSURLConnection connectionWithRequest:request delegate:self];
//3.2
//[[NSURLConnection alloc]initWithRequest:request delegate:self];
//3.3 设置代理,时候发送请求需要检查startImmediately的值
//(startImmediately == YES 会发送 | startImmediately == NO 则需要调用start方法)
NSURLConnection * connect = [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:NO];
//调用开始方法
[connect start];
// [connect cancel];//取消
}
#pragma mark ----------------------
#pragma mark NSURLConnectionDataDelegate
//1.当接收到服务器响应的时候调用
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"%s",__func__);
}
//2.接收到服务器返回数据的时候调用,调用多次
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(@"%s",__func__);
//拼接数据
[self.resultData appendData:data];
}
//3.当请求失败的时候调用
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"%s",__func__);
}
//4.请求结束的时候调用
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"%s",__func__);
NSLog(@"%@",[[NSString alloc]initWithData:self.resultData encoding:NSUTF8StringEncoding]);
}
