手势

首先在view上添加手势 UIPanGestureRecognizer

UIPanGestureRecognizer *panGes = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(goAnimation:)];    [self.view addGestureRecognizer:panGes];

在滑动方法当中根据 translationInView 这个方法返回的点的正负来判断向左还是向右 大于0说明向左，小于0说明向右

UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)sender;        CGPoint point = [pan translationInView:self.view];        if (point.x>0) {}