如何轉到UITableView中的下一個單元格（細節視圖）？

Question

所以，我有一個UITableView拆分3節。我希望能夠，一旦我打開第一部分中的第二行（即），向左滑動到下一個單元格，並向右滑動到前一個單元格。

我寫的刷卡代碼：

SecondDetailView.m 

- (void)viewDidLoad 
{ 
    UISwipeGestureRecognizer *swipeRecognizerLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeDetectedLeft:)]; 
    swipeRecognizerLeft.direction = UISwipeGestureRecognizerDirectionLeft; 
    [self.view addGestureRecognizer:swipeRecognizerLeft]; 
    [swipeRecognizerLeft release]; 

    UISwipeGestureRecognizer *swipeRecognizerRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeDetectedRight:)]; 
    swipeRecognizerRight.direction = UISwipeGestureRecognizerDirectionRight; 
    [self.view addGestureRecognizer:swipeRecognizerRight]; 
    [swipeRecognizerRight release]; 
} 


- (void)swipeDetectedRight:(UIGestureRecognizer *)sender { 

    NSLog(@"Right Swipe"); 

} 

- (void)swipeDetectedLeft:(UIGestureRecognizer *)sender { 
    NSLog(@"Left Swipe"); 
} 

我怎樣才能做到這一點？將代碼放入Detail View中是否正確？

Answer 1

我有一個非常簡單的解決方案，爲您的問題。 您需要在.h文件中聲明NSMutableArray *arr;，並在您移動到詳細信息頁面時將您的數組分配給此數組。 而且你還需要聲明一個NSString *currentPos;變量。

- (void)swipeDetectedRight:(UIGestureRecognizer *)sender { 

    currentPos--; 
    NSMutableDictionary *dic=[arr objectAtIndex:currentPos]; 


} 

- (void)swipeDetectedLeft:(UIGestureRecognizer *)sender { 
    currentPos++; 
    NSMutableDictionary *dic=[arr objectAtIndex:currentPos]; 
} 

以這種方式，你可以得到你的下一個和prev索引值的數組。

希望爲您提供幫助。 Shivam

Answer 2

在詳細視圖控制器中聲明一個協議，並將父級（應該是表視圖控制器）設置爲委託。然後，在滑動方法中調用委託並實現更改所選行所需的代碼。

Answer 3

在我的例子中，我使用NSString作爲我的數據，將被顯示在詳細視圖控制器中。隨意改變，以適合您的需求。好了，所以在這裏我們去：

首先聲明的協議在DetailViewController像這樣：

@class DetailViewController; 

@protocol DetailViewControllerDelegate <NSObject> 
- (void)swipeToNextCell:(DetailViewController *)sender; 
- (void)swipeToPreviousCell:(DetailViewController *)sender; 
@end 

@interface DetailViewController : UIViewController 
@property(weak, nonatomic) id<DetailViewControllerDelegate> delegate; 
@property(copy, nonatomic) NSString *data; 
@property(weak, nonatomic) IBOutlet UILabel *label; 
@end 

接下來的事情就是在DetailViewController添加UISwipeGestureRecognizers檢查手勢：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    UISwipeGestureRecognizer *leftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDetectedLeft:)]; 
    leftGesture.direction = UISwipeGestureRecognizerDirectionLeft; 
    [self.view addGestureRecognizer:leftGesture]; 

    UISwipeGestureRecognizer *rightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeDetectedRight:)]; 
    rightGesture.direction = UISwipeGestureRecognizerDirectionRight; 
    [self.view addGestureRecognizer:rightGesture]; 
} 

實現viewWillAppear中來當您推送您的DetailViewController時顯示您的數據：

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    self.label.text = self.data; 
} 

不要忘了執行將由GestureRecognizers調用的方法：

- (void)swipeDetectedRight:(UISwipeGestureRecognizer *)sender 
{ 
    NSLog(@"Right Swipe"); 
    [self.delegate swipeToNextCell:self]; 
    self.label.text = self.data; 
} 

- (void)swipeDetectedLeft:(UISwipeGestureRecognizer *)sender 
{ 
    NSLog(@"Left Swipe"); 
    [self.delegate swipeToPreviousCell:self]; 
    self.label.text = self.data; 
} 

和多數民衆都在您的詳細信息視圖所需要的。現在轉到TableViewController。你TableViewController應實現DetailViewControllerDelegate協議：

@interface CustomTableViewController : UITableViewController <DetailViewControllerDelegate> 
@property(strong, nonatomic) DetailViewController *detailViewController; 
@property(assign, nonatomic) NSInteger currentRow; 
@end 

這裏是我的detailViewController @property吸氣：

- (DetailViewController *)detailViewController 
{ 
    if (_detailViewController == nil) 
    { 
     _detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil]; 
     _detailViewController.delegate = self; 
    } 
    return _detailViewController; 
} 

這裏是我如何管理行選擇：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    DetailViewController *viewController = self.detailViewController; 
    viewController.data = [NSString stringWithFormat:@"Cell: %d", indexPath.row]; 
    viewController.title = @"Detail"; 
    self.currentRow = indexPath.row; 
    [self.navigationController pushViewController:viewController animated:YES]; 
} 

你的最後一件事要做的是實現協議的方法：

- (void)swipeToNextCell:(DetailViewController *)sender 
{ 
    // Get data for next row 
    sender.data = [NSString stringWithFormat:@"Cell: %d", ++self.currentRow]; 

} 

- (void)swipeToPreviousCell:(DetailViewController *)sender 
{ 
    // Get data for next row 
    sender.data = [NSString stringWithFormat:@"Cell: %d", --self.currentRow]; 
} 

我在模擬器上測試過，工作正常。這很簡單，因爲我的數據模型非常簡單 - 它只是NSString。沒有檢查部分是否有任何行，所以你必須自己弄清楚。但整個代表團模式應該是一樣的。

祝你好運！