如何创建一个从表视图返回编辑模式的segue？

Question

也许我没有问正确的称号，对不起这个，我是一个初学者，所以我会解释一下：

我有2个屏幕： 1.创建笔记 - 这个屏幕有一个视图控制器，TextView和导航（创建/取消）。 2.注释页面 - 此屏幕有一个表格视图控制器和一个带有加号按钮的导航。 （非常类似于苹果笔记应用程序）

我想的是，在表视图，每当我单击单元格，将带我回到这个笔记的编辑页面...

所以我加推从单元格延伸到笔记页面，每次我点击一个单元格时，它都会打开一个新的笔记页... 所以我知道我在这里错过了一些东西，如果你能帮我弄清楚它会很感激

这是我的表视图控制器.m文件：

#import "NMNotesListViewController.h" 
#import "NMCreateNotesViewController.h" 

@interface NMNotesListViewController() 

@property (strong, nonatomic) NSMutableArray *notes; 

@end 

@implementation NMNotesListViewController 


- (IBAction) unwindToList: (UIStoryboardSegue *) segue 
{ 

    NMCreateNotesViewController *source = [segue sourceViewController]; 
    NMNote *note = source.note; 

    if (note != nil) { 
     [self.notes addObject:note]; 
     [self.tableView reloadData]; 
    } 

} 

- (id)initWithStyle:(UITableViewStyle)style 
{ 
    self = [super initWithStyle:style]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.notes = [[NSMutableArray alloc] init]; 

    // Uncomment the following line to preserve selection between presentations. 
    // self.clearsSelectionOnViewWillAppear = NO; 

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
    // self.navigationItem.rightBarButtonItem = self.editButtonItem; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

#pragma mark - Table view data source 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{ 
    // Return the number of sections. 
    return 1; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    // Return the number of rows in the section. 
    return [self.notes count]; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"NotesPrototypeCell"; 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; 

    // Configure the cell... 


    NMNote *note = [self.notes objectAtIndex:indexPath.row]; 
    cell.textLabel.text = note.content; 


    return cell; 
} 

@end 

这是我的视图控制器（创建笔记）.m文件：

#import "NMCreateNotesViewController.h" 

@interface NMCreateNotesViewController() 

@property (weak, nonatomic) IBOutlet UIBarButtonItem *createButton; 

@property (weak, nonatomic) IBOutlet UITextView *textField; 

@end 

@implementation NMCreateNotesViewController 

- (void)registerForKeyboardNotifications 
{ 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil]; 

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil]; 

} 

- (void)keyboardWasShown:(NSNotification*)aNotification { 
    NSDictionary* info = [aNotification userInfo]; 
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; 
    CGRect bkgndRect = self.textField.superview.frame; 
    bkgndRect.size.height += kbSize.height; 
    [self.textField.superview setFrame:bkgndRect]; 
    [self.textField setContentOffset:CGPointMake(0.0, self.textField.frame.origin.y-kbSize.height) animated:YES]; 
} 


- (void) keyboardWillBeHidden: (NSNotification *) aNotification 
{ 
    UIEdgeInsets contentInsets = UIEdgeInsetsZero; 

    self.textField.contentInset = contentInsets; 

    self.textField.scrollIndicatorInsets = contentInsets; 
} 


- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    if (sender != self.createButton) return; 
    if (self.textField.text.length > 0) { 
     self.note = [[NMNote alloc] init]; 
     self.note.content = self.textField.text; 

    } 
} 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end 

Answer 1

@jeely接近，但你需要做的是，创造一个SEGUE从viewController到viewController。

在的tableView委托didSelectRowAtIndexPath你会瓶坯SEGUE：

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 
    [self performSegueWithIdentifier:@"yourSegue" sender:sender]; 
} 

因为要说明传递到下一个控制器，你需要做的是，在prepareForSegue方法：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    // Make sure your segue name in storyboard is the same as this line 
    if ([[segue identifier] isEqualToString:@"yourSegue"]) 
    { 
     //get the note 
     NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; 
     NMNote *note = [self.notes objectAtIndex:indexPath.row]; 
     //set the note 
     NMCreateNotesViewController *createVC = (NMCreateNotesViewController*)segue.destinationViewController; 
     createVC.noteToDisplay = note.content; 
    } 
} 

最后noteToDisplay只是一个NSString属性，一旦执行segue，您将设置为textView属性。