Question

我正在尝试为segue做准备，但是当我设置VC的实例时，我会得到一个线程1信号sigabrt错误。我导入了VC，#import "NoteViewController.h"

在我为Segue做准备时：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"ShowNote"]) {
    NoteDetailViewController *noteDetailViewController = [segue destinationViewController];
    NSIndexPath *selectedIndexPath = self.tableView.indexPathForSelectedRow;
    NSInteger arrayItem = selectedIndexPath.row * 2;
    noteDetailViewController.note = [_notes objectAtIndex:arrayItem];
} else if ([segue.identifier isEqualToString:@"AddNote"]) {
    Note *note = [Note new];
    [self.notes addObject:note];
    NoteDetailViewController *noteDetailViewController = [segue destinationViewController]; // ERROR COMES HERE!
    noteDetailViewController.note = note;
}
}

过去30分钟我一直在调试，但我无法弄清楚发生了什么。谢谢！

编辑：

我可能已经找到了这个问题;

***由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：'尝试插入非属性列表对象（ “” ）用于关键notesData'

这是我的VC代码。

#import "NotesListTableViewController.h"
#import "Note.h"
#import "NoteDetailViewController.h"

@interface NotesListTableViewController ()

@property (nonatomic, strong) NSMutableArray *notes;

@end

@implementation NotesListTableViewController

- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];

if (self) {
    _notes = [[NSUserDefaults standardUserDefaults]
              mutableArrayValueForKey:@"notesData"];;
}

return self;
}

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];

[self.tableView reloadData];
}


- (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 {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"NotesCell" forIndexPath:indexPath];
       cell.textLabel.text = [_notes objectAtIndex:indexPath.row * 2];
     //  cell.textLabel.text = [self.notes[indexPath.row] title];
       cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

return cell;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

NSInteger titleToDelete = indexPath.row * 2;
NSInteger messageToDelete = titleToDelete - 1;

[_notes removeObjectAtIndex:titleToDelete];
[_notes removeObjectAtIndex:messageToDelete];
[[NSUserDefaults standardUserDefaults]setObject:_notes forKey:@"notesData"];

[self.notes removeObjectAtIndex:indexPath.row];
[self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}



- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

if ([segue.identifier isEqualToString:@"ShowNote"]) {
    NoteDetailViewController *noteDetailViewController = [segue destinationViewController];
    NSIndexPath *selectedIndexPath = self.tableView.indexPathForSelectedRow;
    NSInteger arrayItem = selectedIndexPath.row * 2;
    noteDetailViewController.note = [_notes objectAtIndex:arrayItem];
} else if ([segue.identifier isEqualToString:@"AddNote"]) {
    Note *note = [Note new];
    [self.notes addObject:note];
    NoteDetailViewController *noteDetailViewController = [segue destinationViewController];
    noteDetailViewController.note = note;
}
}



- (IBAction)doneButton:(id)sender {

[self dismissViewControllerAnimated:YES completion:nil];

}

@end

Answer 1

我认为这是错误 _notes = [[NSUserDefaults standardUserDefaults] mutableArrayValueForKey：@＆＃34;的notesdata＆＃34;];

也许你得到这个错误，试试这个答案 https://stackoverflow.com/a/19720674/2680768

设置视图控制器的实例时应用程序崩溃

1 个答案: