好的，在搜索手势识别器文档后终于找到了。

解决方案是实现UIGestureRecognizerDelegate并添加以下内容:

#pragma mark UIGestureRecognizerDelegate methods
    
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
  if ([touch.view isDescendantOfView:autocompleteTableView]) {
            
    // Don't let selections of auto-complete entries fire the 
    // gesture recognizer
    return NO;
  }
        
  return YES;
}

这样就解决了。希望这也能帮助到其他人。

下面是我的解决方案，它将识别器的shouldReceiveTouch直接绑定到键盘是否显示。

在点击手势识别器委托中:

#pragma mark - UIGestureRecognizerDelegate

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    if ([PFXKeyboardStateListener sharedInstance].visible) {
        return YES;
    }

    return NO;
}

PFXKeyboardStateListener.h:

@interface PFXKeyboardStateListener : NSObject
{
    BOOL _isVisible;
}

+ (PFXKeyboardStateListener *)sharedInstance;

@property (nonatomic, readonly, getter=isVisible) BOOL visible;

@end

PFXKeyboardStateListener.m:

static PFXKeyboardStateListener *sharedInstance;

@implementation PFXKeyboardStateListener

+ (PFXKeyboardStateListener *)sharedInstance
{
    return sharedInstance;
}

+ (void)load
{
    @autoreleasepool {
        sharedInstance = [[self alloc] init];
    }
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (BOOL)isVisible
{
    return _isVisible;
}

- (void)didShow
{
    _isVisible = YES;
}

- (void)didHide
{
    _isVisible = NO;
}

- (id)init
{
    if ((self = [super init])) {
        NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
        [center addObserver:self selector:@selector(didShow) name:UIKeyboardDidShowNotification object:nil];
        [center addObserver:self selector:@selector(didHide) name:UIKeyboardWillHideNotification object:nil];
    }
    return self;
}

@end

你可能想要更新键盘监听器的单例模式，我还没有得到它。希望这对每个人都有用，就像对我一样。^ ^

我有一个不同的情况，我想要触摸手势函数被调用，只有当用户点击表视图之外。如果用户在表视图内点击，那么触摸手势函数不应该被调用。此外，如果触摸手势函数被调用，它仍然应该将触摸事件传递给被点击的视图，而不是消耗它。

生成的代码是阿卜杜勒拉赫曼·马苏德的答案和尼古拉·尼尔森的答案的组合。

extension MyViewController: UIGestureRecognizerDelegate {
    func addGestureRecognizer() {
        let tapOnScreen = UITapGestureRecognizer(target: self,
                                                action: #selector(functionToCallWhenUserTapsOutsideOfTableView))

        // stop the gesture recognizer from "consuming" the touch event, 
        // so that the touch event can reach other buttons on view.
        tapOnScreen.cancelsTouchesInView = false

        tapOnScreen.delegate = self

        self.view.addGestureRecognizer(tapOnScreen)
    }

    // if your tap event is on the menu, don't run the touch event.
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
        if touch.view?.isDescendant(of: self.tableView) == true {
            return false
        }
        return true
    }

    @objc func functionToCallWhenUserTapsOutsideOfTableView() {

        print("user tapped outside table view")
    }
}

在MyViewController类，类有UITableView，在onViewDidLoad()，我确保调用addGestureRecognizer():

class MyViewController: UIViewController {
    ...
    override func viewDidLoad() {
        super.viewDidLoad()
        ...
        self.addGestureRecognizer()
        ...
    }
    ...
}

解决这个问题最简单的方法是:

UITapGestureRecognizer *tapRec = [[UITapGestureRecognizer alloc] 
    initWithTarget:self action:@selector(tap:)];
[tapRec setCancelsTouchesInView:NO];

这让UIGestureRecognizer识别点击，并将触摸传递给下一个响应器。这个方法的一个意想不到的结果是，如果你在屏幕上有一个UITableViewCell来推另一个视图控制器。如果用户轻按该行以取消键盘，则键盘和推送都将被识别。我怀疑这是你的意图，但这种方法适用于许多情况。

同时，扩展Robert的回答，如果你有一个指向表视图的指针，那么你可以直接比较它的类，而不是必须转换为字符串，希望苹果不会改变命名法:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
     shouldReceiveTouch:(UITouch *)touch
{
    if([touch.view class] == tableview.class){
        return //YES/NO
    }

    return //YES/NO

}

记住，你还必须声明UIGestureRecognizer来拥有一个包含这段代码的委托。

将你的识别器的cancelsTouchesInView设置为false。否则，它为自己“消耗”触摸，而不将它传递给表视图。这就是为什么选择事件永远不会发生。

例如在swift中

let tapOnScreen: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "CheckTheTime")
tapOnScreen.cancelsTouchesInView = false
view.addGestureRecognizer(tapOnScreen)

我的情况是不同的，包括一个uisearchbar和uitableview在self.view。我想通过触摸视图来消除uisearchbar键盘。

var tapGestureRecognizer:UITapGestureRecognizer?

override func viewWillAppear(animated: Bool) {
    tapGestureRecognizer = UITapGestureRecognizer(target: self, action:Selector("handleTap:"))
}

关于UISearchBar委托方法:

func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
    view.addGestureRecognizer(tapGestureRecognizer!)
    return true
}
func searchBarShouldEndEditing(searchBar: UISearchBar) -> Bool {
    view.removeGestureRecognizer(tapGestureRecognizer!)
    return true
}

当用户触摸self.view时:

func handleTap(recognizer: UITapGestureRecognizer) {
    sampleSearchBar.endEditing(true)
    sampleSearchBar.resignFirstResponder()
}