摘要：#import <UIKit/UIKit.h>@interface ViewController : UIViewController{ UIButton *doneInKeyboardButton;}- (IBAction)NOBut:(id)sender;- (IBAction)But:(id)sender;@end#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{ //注册通知 [[NSNot 阅读全文