创建get请求,

1.将网址初始化成一个OC字符串对象.
NSString * urlString = [NSString stringWithFormat:@"%@?query=%@&region=%@&output=json&ak=6E823f587c95f0148c19993539b99295",kBusinessInfoURL,@"银行",@"济南"];
     如果网址中存在中文,进行转码

    NSString * urlString = @"http://image.zcool.com.cn/56/13/1308200901454.jpg";

    NSString * newURLString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
 

2.构建网络URL对象
    NSURL * url = [NSURL URLWithString:newURLString];
    //3.创建网络请求
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];
  

3.创建同步连接.
    NSURLResponse * response = nil;
    NSError * error = nil;
    NSData * data = http://www.mamicode.com/[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
   

4.解析

    NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    NSLog(@"%@",dic);

同步GET