编辑代码

#import <Foundation/Foundation.h>
int main(int argc, char* argv[]) {
   
    NSURL *url=[NSURL URLWithString:@"http://www.baidu.com"];
    NSURLRequest *request=[NSURLRequest requestWithURL:url];
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:nil];

    printf("%s","Hello world!2");
    return 0;
}