将 UITapGestureRecognizer 添加到 UITextView 而不阻止 textView 触摸

Question

我怎样才能将UITapGestureRecognizer 添加到 UITextView 但仍然让UITextView 的触摸正常？

目前，只要我向我的 textView 添加自定义手势，它就会阻止点击 UITextView 默认操作，例如定位光标。

var tapTerm:UITapGestureRecognizer = UITapGestureRecognizer()

override func viewDidLoad() {
    tapTerm = UITapGestureRecognizer(target: self, action: "tapTextView:")
    textView.addGestureRecognizer(tapTerm)
}

func tapTextView(sender:UITapGestureRecognizer) {
    println("tapped term – but blocking the tap for textView :-/")
…
}

如何在处理点击的同时保持光标定位等任何 textView 行为不变？

Answer 1

Swift 4.2
以下步骤允许我通过点击转义全屏 UITextView，同时允许滚动 UITextView 的内容：

1. 从 UITableView 断开 UIGestureRecognizer。
2. 制作了一个CustomTextView：UITextView。
3. 为带有 CustomTextView 的特定 UIViewController 添加了一个“发送者”变量。
4. “Touches Ended...”的陷阱
5. 在发送方 UIViewController 中调用 excape 函数。

class CustomTextView: UITextView {
    var sender: DocViewController?

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let controller = sender {
            controller.handleSwipeGesture()
        }
    }
}

我可以滚动 UITextView 的内容，也可以点击退出。
'sender' 是在创建时从宿主 UIViewController 设置的。

Answer 2

如果有人来这里寻找 @Zell B. 在 Objective C 中的答案，代码如下：

- (void)viewDidLoad {
    [super viewDidLoad];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(textViewTapped:)];
    tap.delegate = self; 
    tap.numberOfTapsRequired = 1; 
   [self.textView addGestureRecognizer:tap];
}   

- (void)textViewTapped:(UITapGestureRecognizer *)tap {
    //DO SOMTHING 
}

#pragma mark - Gesture recognizer delegate

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES; 
}

PS：别忘了

Answer 3

要做到这一点，让您的视图控制器采用 UIGestureRecognizerDelegate 并覆盖应该与手势识别器方法同时识别，例如：

override func viewDidLoad() {
    tapTerm = UITapGestureRecognizer(target: self, action: "tapTextView:")
    tapTerm.delegate = self
    textView.addGestureRecognizer(tapTerm)
}

func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {

    return true
}