iPad：屏幕 left/right 侧的手势识别器

Question

我正在开发一个基于 GLKViewController 的游戏，它将点击和滑动解释为游戏控制。我想通过让第一个玩家在屏幕左侧点击或滑动，让第二个玩家在屏幕右侧点击或滑动来支持双人游戏模式。在一个完美的世界中，我希望手势识别器能够工作，即使滑动很草率并且超过了屏幕的中心线（滑动的起点用于确定哪个玩家获得输入）。

实现它的最佳方法是什么？我可以在屏幕的左半边放置一个手势识别器，在屏幕的右侧放置另一个吗？即使双方同时快速 tapped/swiped ，两个独立的识别器能否一起正常工作？或者我应该创建一个全屏识别器并完全自己解析滑动和点击？我没有使用手势识别器的经验，所以我不知道首选方法是什么，也不知道当同时滑动多个手势时它们的效果如何。

Answer 1

我最终将两个 UIView 叠加在我的 GLKView 之上，一个在屏幕左侧，一个在屏幕右侧。每个视图都有一个 UIPanGestureRecognizer 和一个 UILongPressGestureRecognizer（长按识别器基本上是一个更灵活的点击——我需要用它来拒绝某些手势被解释为平移和点击同时）。这非常有效。

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Add tap and pan gesture recognizers to handle game input.
    {
        UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSidePan:)];
        panRecognizer.delegate = self;
        [self.leftSideView addGestureRecognizer:panRecognizer];

        UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSideLongPress:)];
        longPressRecognizer.delegate = self;
        longPressRecognizer.minimumPressDuration = 0.0;
        [self.leftSideView addGestureRecognizer:longPressRecognizer];
    }
    {
        UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSidePan:)];
        panRecognizer.delegate = self;
        [self.rightSideView addGestureRecognizer:panRecognizer];

        UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSideLongPress:)];
        longPressRecognizer.delegate = self;
        longPressRecognizer.minimumPressDuration = 0.0;
        [self.rightSideView addGestureRecognizer:longPressRecognizer];
    }
}

- (void)handleLeftSidePan:(UIPanGestureRecognizer *)panRecognizer
{
    [self handleGameScreenPan:panRecognizer withVirtualController:&g_iPadVirtualController[0]];
}

- (void)handleRightSidePan:(UIPanGestureRecognizer *)panRecognizer
{
    [self handleGameScreenPan:panRecognizer withVirtualController:&g_iPadVirtualController[1]];
}

- (void)handleLeftSideLongPress:(UILongPressGestureRecognizer *)longPressRecognizer
{
    [self handleGameScreenLongPress:longPressRecognizer withVirtualController:&g_iPadVirtualController[0]];
}

- (void)handleRightSideLongPress:(UILongPressGestureRecognizer *)longPressRecognizer
{
    [self handleGameScreenLongPress:longPressRecognizer withVirtualController:&g_iPadVirtualController[1]];
}

iPad：屏幕 left/right 侧的手势识别器

iPad: gesture recognizer on left/right side of screen

objective-c

ipad

uigesturerecognizer

ios

uiswipegesturerecognizer