网络请求及数据解析(注意事项:带中文的需要转换) +从网络获取图片

- (NSDictionary*)requestDataWithMethod:(NSString *)method{

    //含中文转换需要转码

    NSString *str = [method stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    //构建对象

    NSURL *url = [NSURL URLWithString:str];

    //创建网络请求

    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.f];

    //创建同步连接

    NSURLResponse *response = nil;

    NSError *error = nil;

　　//data存放二进制数据

    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

　　//解析 

    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];

　　//返回请求到的字典

    return dic;

}

从网络获取图片

  

//取出字典中images对应的value

    NSDictionary *tempDic = [[[temp1 valueForKey:@"subjects"] objectAtIndex:0] objectForKey:@"images"];

    //从字典中再取出key对应的对象(网址:nsstring)

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@",[tempDic objectForKey:@"small"]]];

    //取出

    NSData *data = [NSData dataWithContentsOfURL:url];

    UIImageView *tempImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 200)];

    tempImageView.center = self.view.center;

    [self.view addSubview:tempImageView];

    //获得图片

    tempImageView.image = [UIImage imageWithData:data];