NSURLConnection请求网页数据

获取天气信息的网络请求与解析

最新推荐文章于 2025-10-25 10:02:04 发布

原创最新推荐文章于 2025-10-25 10:02:04 发布 · 524 阅读

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本文详细阐述了如何通过网络请求获取指定城市的天气信息，并解析JSON数据以展示当前天气状况，包括天气描述、温度范围等关键指标。

    NSString *weatherUrl=[NSString stringWithFormat:@"%@%@.html",@"http://www.weather.com.cn/data/cityinfo/",cityID];
    
    DLog(@"the url is %@",weatherUrl);
	NSURL *url = [NSURL URLWithString:weatherUrl];
	NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
	
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *request, NSData *data, NSError *err) {
        NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
        DLog(@"weather json is %@",dic);
        NSMutableDictionary *jsonoSubObj = [dic objectForKey:@"weatherinfo"];

        [self.todayWeather setText:[[NSString alloc] initWithFormat:@"%@\n",[jsonoSubObj objectForKey:@"weather"]]];
        [self setWeatherIcon:[self.todayWeather text]];
        [self.todayWeatherNum setText:[NSString stringWithFormat:@"%@-%@",[jsonoSubObj objectForKey:@"temp2"],[jsonoSubObj objectForKey:@"temp1"]]];
        
    }];
    
    
	NSURLConnection *connection = [[NSURLConnection alloc]
								   initWithRequest:request
								   delegate:self];
	[connection start];
    
	[connection release];
	[request release];