UITextField The input space cursor is gone

UITextField *textFile =[[UITextField alloc] initWithFrame:CGRectMake(0, 200, 300, 40)]; textFile.backgroundColor = [UIColor redColor]; textFile.tintColor = [UIColor blueColor]; textFile.textAlignment = NSTextAlignmentRight; textFile.clearButtonMode = UITextFieldViewModeWhileEditing; [self.view addSubview:textFile];