这是我的代码:while(true){if([identificationFieldbecomeFirstResponder]){NSLog(@"finally!");break;}else{if([identificationFieldcanBecomeFirstResponder]){NSLog(@"can");}else{NSLog(@"cannot");}NSLog(@"%@",identificationField);NSLog(@"dadgum!!");}}这是它记录的内容:2014-02-0511:33:54.253StoreTest[22488:70b]can2014-