轻扫手势

来源：互联网发布：php首字母大写函数编辑：程序博客网时间：2024/04/20 15:34
#import "ViewController.h"@interface ViewController (){    int _index;}@property (nonatomic, weak)UIImageView *imageView;@end@implementation ViewController- (UIImageView *)imageView{    if (!_imageView)    {        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1"]];        imageView.frame = CGRectMake(0, 0, self.view.frame.size.width, 400);        imageView.userInteractionEnabled = YES;        [self.view addSubview:imageView];                _imageView = imageView;    }        return _imageView;}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        _index = 1;        [self addSwipeGestureToImageView];}/** *  添加轻扫手势 */- (void)addSwipeGestureToImageView{    //注意：支持几个方向的扫动，就创建一个手势对象    //从左向右    UISwipeGestureRecognizer *leftSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeHandle:)];    //默认从左向右    leftSwipeGesture.direction = UISwipeGestureRecognizerDirectionRight;    [self.imageView addGestureRecognizer:leftSwipeGesture];        ////从右向左    UISwipeGestureRecognizer *rightSwipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeHandle:)];    rightSwipeGesture.direction = UISwipeGestureRecognizerDirectionLeft;    [self.imageView addGestureRecognizer:rightSwipeGesture];    }- (void)swipeHandle:(UISwipeGestureRecognizer *)gesture{    //子类型    NSString *subType = nil;        //从左向右    if (gesture.direction == UISwipeGestureRecognizerDirectionRight)    {        _index--;        if (_index == 0) {            _index = 8;        }        subType = kCATransitionFromLeft;    }    //从右向左    else    {        _index++;        if (_index > 8) {            _index = 1;        }        subType = kCATransitionFromRight;    }        /*     CATransition 转场动画     CAKeyframeAnimation 关键帧动画     CABasicAnimation 隐式动画(基本动画)     CAAnimationGroup 动画组     */            //转场动画    CATransition *transition = [CATransition animation];    //类型（确定动画类型）    transition.type = @"cube";    //子类型(确定方向)    transition.subtype = subType;    //动画时间    transition.duration = 1;    [self.imageView.layer addAnimation:transition forKey:nil];        //修改图片    self.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d",_index]];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end
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