Ios 长按后轻扫

好的，我正在帮助将android游戏转换为iOS。该游戏基于2048，但以字母代替数字。我有一个很好的工作点，但仍在学习目标C/iOS的怪癖。到目前为止，我有瓷砖/网格工作，移动工作，等等，但我需要一些帮助。其目标是允许用户长按一个磁贴来选择它，然后将手指滑动到相邻的磁贴上开始拼写单词。我已经实现了长按部分，但我有点不知道如何让它长按然后轻扫。除此之外，我已经有了一个滑动功能，允许用户移动瓷砖。在这里搜索时，我看到了关于子类化的建议，因此我想我需要对

uisweegesturecognizer

方法进行子类化。我已经安装了手势识别器，但我不确定接下来该怎么做

因此，有几个问题

最好的方法是什么？实现每个

UISweepGestureRecognitor

的子类

我当前的刷卡检测会干扰吗？（现在，滑动本身会沿滑动方向移动瓷砖）

我想我需要做一个（如果长按）然后激活子类滑动方法

任何回答上述问题的例子都会大有帮助。我不是要你帮我做这件事，而是至少给我指出一个大致的方向。谢谢

代码如下

//  Grid.m
#import "Grid.h"
#import "Tile.h"

- (void)didLoadFromCCB {
    // listen for swipes to the left
    UISwipeGestureRecognizer * swipeLeft= [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeLeft)];
    swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
    [[[CCDirector sharedDirector] view] addGestureRecognizer:swipeLeft];

    // listen for swipes to the right
    UISwipeGestureRecognizer * swipeRight= [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeRight)];
    swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
    [[[CCDirector sharedDirector] view] addGestureRecognizer:swipeRight];

    // listen for swipes up
    UISwipeGestureRecognizer * swipeUp= [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeUp)];
    swipeUp.direction = UISwipeGestureRecognizerDirectionUp;
    [[[CCDirector sharedDirector] view] addGestureRecognizer:swipeUp];

    // listen for swipes down
    UISwipeGestureRecognizer * swipeDown= [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeDown)];
    swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
    [[[CCDirector sharedDirector] view] addGestureRecognizer:swipeDown];

    // listen for long press
    UILongPressGestureRecognizer *longpress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(onLongPress:)];
    [longpress setMinimumPressDuration:0.5];
    [[[CCDirector sharedDirector] view] addGestureRecognizer:longpress];
}

- (void)swipeLeft {
    [self move:ccp(-1, 0)];
}
- (void)swipeRight {
    [self move:ccp(1, 0)];
}
- (void)swipeDown {
    [self move:ccp(0, -1)];
}
- (void)swipeUp {
    [self move:ccp(0, 1)];
}

// detect longpress, convert to NodeSpace and check if touch location is within tile boundingbox. If yes, set background white, text black.
- (void)onLongPress:(UILongPressGestureRecognizer *) recognizer {
    CGPoint touchPoint = [[CCDirector sharedDirector] convertToGL:[recognizer locationInView:[recognizer view]]];
    touchPoint = [self convertToNodeSpace:touchPoint];

    if (recognizer.state == UIGestureRecognizerStateBegan) {
        for (Tile *tile in self.children) {
            if([tile isKindOfClass:[Tile class]]) {

                CGRect tileBoundingBox = tile.boundingBox;
                if (CGRectContainsPoint(tileBoundingBox, touchPoint)) {

                    tile.backgroundNode.color = [CCColor whiteColor];
                    tile.valueLabel.color = [CCColor blackColor];
                    [self spellWord:tile.value];
                    [_word setString:[_word lowercaseString]];
                    CCLOG(@"%@", _word);
                }
            }
        }
    }

    if (recognizer.state == UIGestureRecognizerStateChanged) {

    }

    if (recognizer.state == UIGestureRecognizerStateEnded) {
        for (Tile *tile in self.children) {
            if([tile isKindOfClass:[Tile class]]) {

                CGRect tileBoundingBox = tile.boundingBox;
                if (CGRectContainsPoint(tileBoundingBox, touchPoint)) {
                    tile.backgroundNode.color = [tile getColor:tile.value];
                    tile.valueLabel.color = [self getContrastColor:r green:g blue:b];

                }
            }
        }
    }
}

// allow for simultaneous gestures
- (BOOL)gestureRecognizer:(UIGestureRecognizer *) recognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

---

回答你的问题：

我并不认为这是一种需要对

uilongpressurerecognizer

进行子类化的编码情况。话虽如此，子类化通常是清理视图控制器代码的好方法，这样视图控制器类中就不会有血淋淋的手势识别器代码。但这里没有任何东西（据我所知）需要这样做。您通常会深入到手势识别器的子类中，在这些子类中，您需要一些特殊的自定义行为（例如，如果某个复杂的标准失败，则手势会失败）。不过，在我走这条路之前，我会先看看你是否能通过标准手势实现所需的用户体验

我能看到刷卡手势相互干扰的唯一原因是您指定了

应该同时使用GestureRecognizer进行识别

应该返回

YES

。这在需要同时运行多个识别器的情况下使用，这在这里似乎没有必要（而且只是问题的根源）

我不清楚你是真的想要一个单独的刷卡手势，还是仅仅想要一个手势（“长时间按住并拖动”）。但是，如果您需要单独的滑动手势，您通常会通过指定

requiregestrerecognizertofail

来指定手势识别器的相对优先级（例如，滑动需要长按才能失败才能识别滑动）。但如果你真的只有一个手势（“长时间按住并拖动”），那么只需要一个手势识别器

这似乎没有必要。如果要在长按被识别后检测移动，可以将“长按后移动”代码放入

UIgestureRecognitedStateChanged

的

If

语句中，该语句用于

UIgestureRecognitedStateChanged

，该语句发生在长按被识别后，但在用户抬起手指之前。

ui长按手势识别器

是一个连续的手势识别器，在最初识别手势后，随着用户手指的移动，该识别器将继续获得更新

---

我知道你没有要求输入代码，但是如果你想要一个滑动手势，以及一个长按手势，基本上就是把它捡起来并拖动，你可以做如下的事情。注意，我使滑动手势要求长按失败，因此如果用户长按，则优先，否则它会滑动。但您可能根本不需要滑动手势，因此如果不需要，只需将其完全移除：

#import <UIKit/UIGestureRecognizerSubclass.h>

- (void)viewDidLoad {
    [super viewDidLoad];

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
    [self.view addGestureRecognizer:longPress];

    // if you needed a second gesture, a swipe, completely distinct from the long press and drag
    // gesture, you could add it like so:
    //
    // UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
    // [swipe requireGestureRecognizerToFail:longPress];
    // // do additional swipe configuration
    // [self.view addGestureRecognizer:swipe];
}

- (void)handleSwipe:(UISwipeGestureRecognizer *)gesture
{
    // do your separate swipe stuff here
}

- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture
{
    static UIView *tileToMove;
    static CGPoint startCenter;
    static CGPoint startLocation;

    CGPoint location = [gesture locationInView:self.view];

    switch (gesture.state) {
        case UIGestureRecognizerStateBegan:
        {
            // find the tile

            tileToMove = [self findTileToMove:location];
            if (tileToMove) {
                // if found, capture state ...

                startCenter = tileToMove.center;
                startLocation = location;

                // ... and animate "pick up tile", so the user gets positive feedback
                // that the drag/swipe portion of the gesture is starting.

                [UIView animateWithDuration:0.25 animations:^{
                    tileToMove.transform = CGAffineTransformMakeScale(1.2, 1.2);
                }];
            } else {
                gesture.state = UIGestureRecognizerStateFailed;
            }
            break;
        }
        case UIGestureRecognizerStateChanged:
        {
            // move the tile as the user's finger moves

            CGPoint translate = CGPointMake(location.x - startLocation.x, location.y - startLocation.y);

            // note, if you want to constrain the translation to be, for example, on the
            // x-axis alone, you could do something like:
            //
            // CGPoint translate = CGPointMake(location.x - startLocation.x, 0);

            tileToMove.center = CGPointMake(startCenter.x + translate.x, startCenter.y + translate.y);
            break;
        }
        case UIGestureRecognizerStateEnded:
        {
            // animate "drop the tile"

            [UIView animateWithDuration:0.25 animations:^{
                tileToMove.transform = CGAffineTransformIdentity;

                // if you want the tile to "snap" to some location having let it go,
                // set the `center` or `frame` here.
            }];

            // clear our variables, just in case

            tileToMove = nil;
            startCenter = CGPointZero;
            startLocation = CGPointZero;
            break;
        }
        default:
            break;
    }
}

- (UIView *)findTileToMove:(CGPoint)location
{
    for (UIView *tile in self.tiles) {
        if (CGRectContainsPoint(tile.frame, location)) {
            return tile;
        }
    }

    return nil;
}

#导入
-（无效）viewDidLoad{
[超级视图下载]；
UILongPressGestureRecognitzer*longPress=[[UILongPressGestureRecognitzer alloc]initWithTarget:self action:@selector（handleLongPress:）]；
[self.view addgesturecognizer:longPress]；
//如果你需要第二个手势，一次轻扫，完全不同于长时间的按住和拖动
//手势，您可以这样添加：
//
//UISweepGestureRecognizer*滑动=[[UISweepGestureRecognizer alloc]initWithTarget:self action:@selector（HandleSweep:）]；
//[刷卡要求检测识别邮件：longPress]；
////进行额外的刷卡配置
//[self.view addgestureignizer:滑动]；
}
-（无效）无手擦拭：（UISweepGestureRecognitor*）手势
{
//在这里单独刷卡
}
-（无效）手动长按：（UILongPress手势识别器*）手势
{
静态UIView*平铺移动；
静态CGPoint startCenter；
静态点定位；
CGPoint location=[手势位置视图：self.view]；
开关（手势状态）{
案例UIgestureRecognitzerStateStart：
{
//找到瓷砖
tileToMove=[self-findTileToMove:location]；
如果（平铺移动）{
//如果找到，捕获状态。。。
startCenter=tileToMove.center；
位置=位置；
//…并设置“拾取瓷砖”的动画，以便用户获得积极反馈
//手势的拖动/滑动部分正在开始。
[UIView animateWithDuration:0.25动画：^{
tileToMove.transform=CGAffineTransformMakeScale（1.2,1.2）；
}];
}否则{
手势.state=UIgestureRecognitizerStateFailed；
}
打破
}
案例UIgestureRecognitzerStateChanged:
{
//随着用户手指的移动移动互动程序
CGPoint translate=CGP