使用UIView的animateWithDuration方法做移动动画时，无法响应事件的解决办法

在使用UIView的animateWithDuration方法做位移动画时，动画移动过程中不响应点击事件。

前提条件：

• 设置.userInteractionEnabled = YES //这个默认就是YES，可以不设置
• 在options添加UIViewAnimationOptionAllowUserInteraction

如上设置也不能响应点击事件。 要在移动的过程中点击动画，需要我们自己去实现- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event 方法,根据点击位置检测是否在需要响应的View上。

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    CALayer *layer = self.imageView.layer.presentationLayer;
    if (CGRectContainsPoint(layer.frame, point)) {
        return self.imageView;
    }
    return [super hitTest:point withEvent:event];
}

代码如下：

- (void)initImageView {
    self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(x, -80, 80, 80)];
    [self.imageView setImage:[UIImage imageNamed:@"xxxx"]];
    [self.view addSubview:self.imageView];
    @weakify(self);
    //addTapGestureWithBlock是UIView添加的扩展方法，添加了点击事件
    [self.imageView addTapGestureWithBlock:^{
        @strongify(self);
        if(!self) return;
        [self detailClicked];
    }];
    [UIView animateWithDuration:2.5
                          delay:0 
                        options:UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction
                     animations:^{
        //self.imageView.frame = CGRectMake(self.imageView.x, screeHeight, self.imageView.width, self.imageView.height); 
        self.imageView.frame = CGRectMake(self.imageView.frame.origin.x, screeHeight, self.imageView.frame.size.width, self.imageView.frame.size.height); 
    } completion:nil];
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    CALayer *layer = self.imageView.layer.presentationLayer;
    if (CGRectContainsPoint(layer.frame, point)) {
        return self.imageView;
    }
    return [super hitTest:point withEvent:event];
}