IOS代码笔记之左右滑动效果

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