标签: uitapgesturerecognizer

我有一组 UIImageViews 并以编程方式为它们分配了点击手势识别器。

    myImages.forEach{ UIImageView in
        let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap(gesture:)))
        tap.numberOfTapsRequired = 1
        tap.delegate = self
        view.addGestureRecognizer(tap)
        }

将发件人分配给每个人的最佳方法是什么（或确定以另一种方式点击哪个图像）？我试过不成功

var tag = sender.view!.tag

谢谢！

我想通过点击单元格标签（而不是didSelectRowAt）来编辑标签文本。点击标签函数 ( toDoItemLabelTapped) 显示 nil。

虽然UITapGestureRecognizer效果很好，但它不传递标签文本。

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as!  ToDoItemsCell

    cell.delegate = self

    cell.textField.delegate = self
    cell.textField.isHidden = true
    cell.toDoItemLabel.isUserInteractionEnabled = true

    let aSelector : Selector = Selector(("toDoItemLabelTapped"))
    var tapGesture = UITapGestureRecognizer(target: self, action: aSelector)

    tapGesture.numberOfTapsRequired = 1
    cell.addGestureRecognizer(tapGesture)
    tapGesture.delegate = self as? UIGestureRecognizerDelegate
    tapGesture = UITapGestureRecognizer(target: self, action: aSelector)

    return cell
}

这是函数：

var customTableViewController = ToDoItemsCell()

@objc …

我正在尝试将UITapGestureRecognizer添加到我的应用程序中,以便我可以检测并对所有两个手指点击进行操作,但是通过任何其他用户输入.听起来微不足道,但我无法让它发挥作用.这是我的代码到目前为止,在我的主视图控制器中:

- (void) viewDidLoad {
  // other init stuff
  UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
  [tapRecognizer setNumberOfTouchesRequired:2];
  [tapRecognizer setNumberOfTapsRequired:1];
  [tapRecognizer setCancelsTouchesInView:NO];

  UIView *tapHolderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
  [tapHolderView setMultipleTouchEnabled:YES];
  [tapHolderView addGestureRecognizer:tapRecognizer];

  [self.view addSubview:tapHolderView];

  [tapRecognizer release];
}

- (void) handleTap:(UITapGestureRecognizer *) sender {
  if (sender.state == UIGestureRecognizerStateEnded) {
    // do something
  }
}

会发生什么:双指点按将触发handleTap方法.任何其他用户输入,无论是滑动,捏合,单指点击等,都不会被任何其他视图(UIToolbar,UIWebView等)拾取.

我非常感谢您对此有任何见解,如果我对这个问题不够具体,请告诉我.

在我的iPhone应用程序中,我有一个消息传递屏幕 我添加UITapGestureRecognizer了UIViewController,我也在UITableview屏幕上.我想选择UITableViewCell但我不能选择UITableView因为UITapGestureRecognizer.当我触摸屏幕时,仅调用轻击手势动作,但不调用UITableView委托didSelectRowAtIndexPath:.任何人都可以请我帮助我处理轻拍手势和UITableView:didSelectRowAtIndexPath:.提前致谢.

多个UIImageView上的TapGesture识别器无法正常工作,同时它检测到最后添加的图像视图手势..我已经这样做了,

 UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myFunction:)];
tapped.numberOfTapsRequired = 1;
tapped.delegate = self;


UIImageView *sample_book1= [[UIImageView alloc]initWithFrame:CGRectMake(70, 135, 100,125) ];
sample_book1.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"mathematics.png"]];
sample_book1.userInteractionEnabled = YES;
sample_book1.tag = 0;
[sample_book1 addGestureRecognizer:tapped];
[self.view addSubview:sample_book1];

UIImageView *sample_book2= [[UIImageView alloc]initWithFrame:CGRectMake(220, 135, 100,125) ];
sample_book2.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"biology.png"]];
sample_book2.userInteractionEnabled = YES;
sample_book2.tag = 1;
[sample_book2 addGestureRecognizer:tapped];
[self.view addSubview:sample_book2];

UIImageView *sample_book3= [[UIImageView alloc]initWithFrame:CGRectMake(370, 135, 100,125) ];
sample_book3.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"chemistry.png"]];
sample_book3.userInteractionEnabled = YES;
sample_book3.tag = 2;
 [sample_book3 addGestureRecognizer:tapped];
[self.view addSubview:sample_book3]; …

我正在慢慢地通过Apple的学习Swift的开发工作,我一直在用我的轻拍手势遇到问题.我重新创建了项目编号,所有结果都相同.

我在图像视图中添加了一个轻击手势,这应该会从我的计算机中打开照片库.什么都没发生.

当我从Apple下载并运行示例文件时,一切正常.当我将Apple的代码复制并粘贴到我的代码时,没有任何反应.我已经完成了我所能做的一切,但我觉得我错过了一些东西.

这是我的代码.Apple的代码如下:

import UIKit

class ViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    // MARK: Properties
    @IBOutlet weak var nameTextField: UITextField!
    @IBOutlet weak var mealNameLabel: UILabel!
    @IBOutlet weak var photoImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // handle the text fields user input through delegate callbacks
        nameTextField.delegate = self

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: UITextFieldDelegate
    func textFieldShouldReturn(textField: UITextField) -> Bool {
       // Hide the Keyboard
        textField.resignFirstResponder()
        return …