帶有Tap Gesture Recognizer的UILabel無法正常工作

Question

我使用XIB設計了一個UICollectionViewCell ，在該自定義單元中，我有一個UILabel ，我已啟用了它的用戶交互功能。

在設計cell ，在viewcontroller ，這是我的代碼。

UITapGestureRecognizer *buyNowTapped = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(buyNowClicked:)];
buyNowTapped.numberOfTapsRequired = 1.0;
cell.buy.tag = indexPath.row;
cell.buy.userInteractionEnabled = YES;
[cell.buy addGestureRecognizer:buyNowTapped];

-(void)buyNowClicked : (id)sender
{
  UIButton *button;
  UILabel *label;
  if([sender isKindOfClass:[UIButton class]])
  {
      button = (UIButton *)sender;
      [self buyService:button.tag];
  }
  else if ([sender isKindOfClass:[UILabel class]])
  {
    label = (UILabel *)sender;
    [self buyService:label.tag];
  }
}

但是添加的輕擊手勢不起作用。

Answer 1

我的建議是重新設計，並將UILabel更改為UIButton ，因為UIButton只是處理拍子識別，並且您也沒有將拍子問題轉發到UICollectionView （ didSelectItemAtIndexPath:的確會被調用）。

因此，使用按鈕更改標簽，並在其上的TouchUpInside事件上設置buyNowClicked:方法。

更新：如果由於某種原因無法刪除UILabel，則將UIButton放在UILabel （具有相同frame並最終NSConstraints ），然后將TouchUpInside事件上的buyNowClicked:方法TouchUpInside按鈕上，然后輕松獲勝

Answer 2

使用標簽屬性創建定制單元並使用

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"%ld", (long)indexPath.row);
}

注意：在某處添加了TapGestureRecognizer，它可以防止選擇單元格的didselectitematindexpath

Answer 3

1. 您必須將此代碼添加到“自定義UICollectionViewCell類中。

2. 然后創建一個代表，將響應點擊。

3. 在集合視圖的cellForRowAtIndexPath中分配該委托。

如果您需要詳細說明，請告訴我。

編輯1：代碼：

MyCell.swift：

import UIKit

protocol MyCellDelegate {
    func lblNameTapped(cell: MyCell)
}

class MyCell: UICollectionViewCell {
    @IBOutlet var lblName: UILabel!
    var lblNameTapRec:UITapGestureRecognizer!
    var delegate: MyCellDelegate?

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code

        lblNameTapRec = UITapGestureRecognizer(target: self, action: #selector(MyCell.lblNameTapped(_:)))
        lblName.userInteractionEnabled = true
        lblName.addGestureRecognizer(lblNameTapRec)
    }

    func lblNameTapped(sender: AnyObject){
        delegate?.lblNameTapped(self)
    }

}

ViewController.Swift：

import UIKit

class WallOfPraizeVC: UIViewController,UICollectionViewDataSource,UICollectionViewDelegate,MyCellDelegate {

    @IBOutlet var collectionView: UICollectionView!

    //DelegateMethod
    func lblNameTapped(cell: MyCell) {
        let indexPath = self.collectionView.indexPathForCell(cell)
        print(indexPath!.row)
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
    {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("MyCell", forIndexPath: indexPath) as! MyCell
        cell.delegate = self
        return cell
    }
}

Answer 4

嘗試這個 ：-

-(void)buyNowClicked:(UITapGestureRecognizer*)tap
{
    NSLog(@"buyNowClicked here");
    [self buyService:tap.view.tag];

 }

Answer 5

使用此代碼進行點擊手勢：-

    UITapGestureRecognizer *buyNowTapped = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(buyNowClicked:)];
    buyNowTapped.numberOfTapsRequired = 1.0;
    cell.buy.tag = indexPath.row;
    cell.buy.userInteractionEnabled = YES;
    [cell.buy addGestureRecognizer:buyNowTapped];


    Try this :

    -(void)buyNowClicked : :(UITapGestureRecognizer*)recognizer
    {

        UIView *view = [recognizer view];

        NSLog(@"tag %ld",(long)view.tag);

      UIButton *button;
      UILabel *label;

      if([view isKindOfClass:[UIButton class]])
      {
          button = (UIButton *)sender;
          [self buyService:button.tag];
      }
      else if ([view isKindOfClass:[UILabel class]])
      {
        label = (UILabel *)sender;
        [self buyService:label.tag];
      }
    }