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#pragma mark - 网络请求代理方式(异步) - (IBAction)DelegateButtonDidClicked:(UIButton *)sender { // 1、拼接 urlString,网址里面必须写 http:// 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"; // 2、根据字符串创建 URL(统一资源定位符) NSURL *url = [NSURL URLWithString:urlString]; // 3、根据 url 创建 request 请求类的对象 NSURLRequest *request = [NSURLRequest requestWithURL:url]; // 4、请求数据(代理回调方式)遵守代理 <NSURLConnectionDataDelegate> [NSURLConnection connectionWithRequest:request delegate:self]; }
代理方法
客户端收到服务器的响应
#pragma mark | 客户端收到服务器的响应 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // 只执行一次 // 初始化 receiveData 对象 self.receiveData = [NSMutableData data]; }
客户端收数据(并非一次性全部拿到)
#pragma mark | 客户端收数据(并非一次性全部拿到) - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // 每次返回的都是新数据 // 拼接数据(请求一点 拼接一点) [self.receiveData appendData:data]; }
客户端接收数据完毕
#pragma mark | 客户端接收数据完毕 - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // 解析数据 NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:self.receiveData options:(NSJSONReadingMutableContainers) error:nil]; NSArray *array = dict[@"news"]; self.newsArray = [NSMutableArray array]; for (NSDictionary *smallDict in array) { NewsModal *modal = [[NewsModal alloc] init]; [modal setValuesForKeysWithDictionary:smallDict]; [self.newsArray addObject:modal]; } for (NewsModal *modal in self.newsArray) { NSLog(@"%@", modal.title); } }
网络请求失败
#pragma mark | 网络请求失败 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"%@", error); }