ios - 如何从自定义 UICollectionViewCell 启动 View Controller

Question

我需要从我的自定义 UICollectionViewCell 启动一个 ViewController 但我无法在那里访问我的 navigationController 所以我不知道如何启动因为我只知道一种方法。

仅举个例子

LoginViewController *loginView = [[LoginViewController alloc]init];
[self.navigationController pushViewController:loginView animated:YES];

知道我该怎么做吗？

这就是我通常调用 cell click 的方式

- (void)collectionView:(PSCollectionView *)collectionView didSelectCell:(PSCollectionViewCell *)cell atIndex:(NSInteger)index
{
[NjoftimeManager setSelectedListing:[[NjoftimeManager getMainListings] objectAtIndex:index]];
ListingViewController *listingView = [[ListingViewController alloc]init];
[self.navigationController pushViewController:listingView animated:YES];
}

但我想做的是调用与这里不同的东西

- (void) profileTapped:(UIGestureRecognizer *)gesture{
//some code

NSLog(@"PROFILI %li",(long)gesture.view.tag);
}

我已经为 cell 的页脚 View 提供了一个标签，并希望在单击它时做一些不同的事情，我只能在 Cell 中获取点击事件类。

Answer 1

如果我完全理解你的问题，你想从 Collection View 单元启动一个 View Controller ，作为一个 Root View Controller ，你可以推送和弹出其他 View Controller

你可以这样做，

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath: (NSIndexPath *)indexPath
{
   LoginViewController *loginView = [[LoginViewController alloc]init];
   UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:loginController]; //add this as a root view controller
   [self presentViewController:navController animated:YES completion:nil]; 
} 

编辑在您的自定义单元格中定义一个自定义委托(delegate)，例如我举了一个例子CustomCollectionVIewCell 作为我在 CustomCollectionVIewCell.h 中的自定义单元格，我定义了一个自定义委托(delegate)，如下所示

 CustomCollectionVIewCell.h

 #import <UIKit/UIKit.h>
 @protocol CellFooterDelegate <NSObject>
  - (void)cellFooterViewTapped; //this this is the custom delegate method
 @end

 @interface CustomCollectionVIewCell : UICollectionViewCell
 @property (weak, nonatomic) IBOutlet UIView *footerCellView;
 @property (nonatomic, assign) id<CellFooterDelegate> myCustomdelegate;//define a delegate
 @end

在CustomCollectionVIewCell.m

中

在这个方法中你得到了这个方法的调用

 - (void)profileTapped:(UITapGestureRecognizer *)gesture
  {
    //some code
    if([_myCustomdelegate respondsToSelector:@selector(cellFooterViewTapped)])
    {
       [_myCustomdelegate cellFooterViewTapped]; //call the delegate method 
    }

    NSLog(@"PROFILI %li",(long)gesture.view.tag);
  }

在你使用 Collection View 的 View Controller 中你做这样的事情在 confirmas 中像其他代表一样自定义代表 ViewController.h

#import "CustomCollectionVIewCell.h" //import the file
@interface ViewController :  UIViewController<UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout,CellFooterDelegate>//hear i am confirming to custom delegate 
//.... other code

在ViewController.m文件中

 -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
 {   
     CustomCollectionVIewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
     cell.myCustomdelegate = self; //important as u set self call back to this as u tap the cells footer view

     //....other code
     return cell;

 }

 //if delegate is set correctly u are getting call to this method
 - (void)cellFooterViewTapped
 {
    //hear u can push the controller
    NSLog(@"push hear");

 }

其余代码无需更改，

希望这对你有帮助.. :)

结束编辑