如何实现if else语句的Kobold2D KKInput gestureSwipeDirection？

Question

我发现很难从文档中了解如何使用Kobold2D KKInput gestureSwipeDirection来检测向左/向右/向上/向下滑动，并让它们执行if else语句。有没有人可以帮我提供一个示例代码。谢谢

KKInput* input = [KKInput sharedInput];
KKSwipeGestureDirection dir = input.gestureSwipeDirection;
switch (dir)
{
    case KKSwipeGestureDirectionRight:
        // direction-specific code here
        break;
    case KKSwipeGestureDirectionLeft:
        // direction-specific code here
        break;
    case KKSwipeGestureDirectionUp:
        // direction-specific code here
        break;
    case KKSwipeGestureDirectionDown:
        // direction-specific code here
        break;
}

Answer 1

我认为您正在犯一个错误，您将代码放在一个方法中，但是您应该使用两只手，一只手用于确定KKInput，另一只手用于检查状态，而且您还忘记了gestureSwipeEnabled

尝试这样做：

-(id) init {

    if ((self=[super init])) {

        input = [KKInput sharedInput];
        input.gestureSwipeEnabled = YES;

        [self schedule:@selector(theTime:)];

    }
    return self;
}

-(void) theTime:(ccTime)time {

    if (input.gestureSwipeRecognizedThisFrame) {

        KKSwipeGestureDirection dir = input.gestureSwipeDirection;
        switch (dir)
        {
            case KKSwipeGestureDirectionRight:
                // direction-specific code here
                break;
            case KKSwipeGestureDirectionLeft:
                // direction-specific code here
                break;
            case KKSwipeGestureDirectionUp:
                break;
            case KKSwipeGestureDirectionDown:
                // direction-specific code here
                break;
            default:
                break;
        }
    }
}