OC如何读取本地文件和网络文件

     //读取本地文件
       

NSString *path1=@"/Users/Desktop/学习资料/Object-c/OC_05/OC_05/ruoji.html";        NSStringEncoding encoding;//NSUTF8StringEncoding(4)        NSError *error;        NSString *string8=[NSString stringWithContentsOfFile:path1 encoding:NSUTF8StringEncoding error:&error];//        NSLog(@"string8 = %@,error=%@",string8,error);

        
        //从网络读取字符串
     

  NSURL *url=[NSURL URLWithString:@"http://www.hao123.com"];        NSString *string9=[NSString stringWithContentsOfURL:url                           encoding:NSUTF8StringEncoding                                                      error:nil];        NSLog(@"%@",string9);