NSMutableURLRequest 发送同步请求get方法

-(void)getMethod

{

    [UIApplicationsharedApplication].networkActivityIndicatorVisible =YES;

   //NOTE with this way, cookie is send automatically, so it can be ignored

   //创建NSURLRequest

   NSString* urlEncoding = [root_urlstringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

   NSMutableURLRequest* urlrequest = [NSMutableURLRequestrequestWithURL:[NSURLURLWithString:urlEncoding] cachePolicy:NSURLRequestReturnCacheDataElseLoadtimeoutInterval:0.6];

    [UIApplicationsharedApplication].networkActivityIndicatorVisible =NO;

   //通过NSURLConnection 发送NSURLRequest，这里是同步的，因此会又等待的过程，TIME_OUT为超时时间。

   //error可以获取失败的原因。

    NSError* error = nil;

   NSData* data = [NSURLConnectionsendSynchronousRequest:urlrequest returningResponse:NULLerror:&error];

    NSLog(@"data = %@",data);

    if(!error){

       //data是二进制数据－－下面的代码的作用就是将二进制转换为json字符串

        NSString *stringData = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];

        NSLog(@"stringData = %@",stringData);

    }

   //    NSString* errorString = [NSString stringWithFormat:@"<error string=\"%@\"/>", [error localizedDescription]];

    NSString* errorString = [error localizedDescription];

    if (errorString != nil) {

        NSLog(@"errorString = %@",errorString);

    }

[UIApplicationsharedApplication].networkActivityIndicatorVisible =YES;

}