- (void)viewDidLoad{  [super viewDidLoad];  // Do any additional setup after loading the view.    self.title=@"可以向左（右）滑動";    //向右滑動  UISwipeGestureRecognizer *recognizerLeft;  recognizerLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFromLeft:)];  [recognizerLeft setDirection:(UISwipeGestureRecognizerDirectionLeft)];  [self.view addGestureRecognizer:recognizerLeft];    //向左滑動  UISwipeGestureRecognizer *recognizerRight;  recognizerRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFromRight:)];  [recognizerRight setDirection:(UISwipeGestureRecognizerDirectionRight)];  [self.view addGestureRecognizer:recognizerRight];}#pragma -mark -手勢滑動//向左滑動-(void)handleSwipeFromLeft:(UISwipeGestureRecognizer *)recognizer {    NSLog(@"-------進入向左手勢滑動姿勢-------------");  if (recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"提醒" message:@"進入向左手勢滑動姿勢" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"確定", nil];    [alert show];          }}//向右滑動-(void)handleSwipeFromRight:(UISwipeGestureRecognizer *)recognizer {    NSLog(@"-------進入向右手勢滑動姿勢-------------");  if (recognizer.direction==UISwipeGestureRecognizerDirectionRight) {        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"提醒" message:@"進入向右手勢滑動姿勢" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"確定", nil];    [alert show];      }}