通过左右手势实现简单的照片翻页功能

首先在加载UI的时候添加左右手势

//添加向右滑动的手势

 UISwipeGestureRecognizer *Recognizer;
    Recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(hanleSwipAction:)];
    [Recognizer setDirection:UISwipeGestureRecognizerDirectionRight];

//添加向左滑动的手势
    [self.view addGestureRecognizer:Recognizer];
    Recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(hanleSwipAction:)];
    [Recognizer setDirection:UISwipeGestureRecognizerDirectionLeft];
    [self.view addGestureRecognizer:Recognizer];
    

//滑动手势执行的动作(这里的数组模型是通过collectionView的item点击事件传入的)
-(void)hanleSwipAction:(UISwipeGestureRecognizer *)recognizer{
    if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {
        NSLog(@"向右滑动");
        if (self.curruntCount > 0) {
            self.curruntCount = self.curruntCount - 1;
            ExpertDetailPhoto *model = self.icons[self.curruntCount];
             self.pageNumLabel.text = [NSString stringWithFormat:@"%d/%lu",self.curruntCount + 1,(unsigned long)self.icons.count];
            [self.photoImageView sd_setImageWithURL:[NSURL URLWithString:model.img] placeholderImage:[UIImage imageNamed:@"ImageDefault"]];
            NSString *subtypeString;
            subtypeString = kCATransitionFromLeft;
           [self transitionWithType:@"pageCurl" WithSubtype:subtypeString ForView:self.view];
        }else{
            self.curruntCount = 0;
        }
    }else if(recognizer.direction == UISwipeGestureRecognizerDirectionLeft){
        NSLog(@"向左滑动");
        if (self.curruntCount < (int)(self.icons.count -1)) {
            self.curruntCount = self.curruntCount + 1;
            ExpertDetailPhoto *model = self.icons[self.curruntCount];
             self.pageNumLabel.text = [NSString stringWithFormat:@"%d/%lu",self.curruntCount + 1,(unsigned long)self.icons.count];
            [self.photoImageView sd_setImageWithURL:[NSURL URLWithString:model.img] placeholderImage:[UIImage imageNamed:@"ImageDefault"]];
            NSString *subtypeString;
            subtypeString = kCATransitionFromRight;
            [self transitionWithType:@"pageCurl" WithSubtype:subtypeString ForView:self.view];
        }else{
            self.curruntCount =(int)(self.icons.count - 1);
        }
    }
}

//执行动画的方法
- (void) transitionWithType:(NSString *) type WithSubtype:(NSString *) subtype ForView : (UIView *) view {

//实例化动画对象
    CATransition *animation = [CATransition animation];

//动画执行时间
    animation.duration = 0.5f;

//动画类型
    animation.type = type;
    if (subtype != nil) {
        animation.subtype = subtype;
    }

//动画执行过程效果(例:如淡进淡出)
    animation.timingFunction = UIViewAnimationOptionCurveEaseInOut;

//执行动画操作
    [view.layer addAnimation:animation forKey:@"animation"];

//view的layer层动画.
}