Question

我在这里有一个任务，我应该

创建一个应用程序，将所有粘贴板项目复制到其中一张桌子，深入到所述粘贴板项目的详细视图中

下面，我将为您提供RootViewController.m文件的代码。该计划不起作用，并在此行SIGABRT中误给我cell.textLabel.text = cellValue;。你能告诉我，这里可能有什么问题，并提前感谢你。

#import "RootViewController.h"

@implementation RootViewController
@synthesize detailsViewController;

NSArray* pasteBoardItems;

- (void)viewDidLoad
{
    //  Get a reference to the system pasteboard
    UIPasteboard* pasteBoard = [UIPasteboard generalPasteboard];

    NSLog(@"%@", pasteBoard.items);

    pasteBoardItems = [pasteBoard.items valueForKey:@"public.utf8-plain-text"];
    pasteBoardItems = [pasteBoard.items valueForKey:@"public.item (kUTTypeItem)"];

    self.navigationItem.title = @"Pasteboard";

    [super viewDidLoad];
}

- (void)dealloc
{
    [pasteBoardItems release];
    [super dealloc];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [pasteBoardItems count];
}

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }

   NSString *cellValue = [pasteBoardItems objectAtIndex:indexPath.row];
    cell.textLabel.text = cellValue;

    // Configure the cell.
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSUInteger row = [indexPath row];
    NSString *rowValue = [pasteBoardItems objectAtIndex:row];
    NSString *message = [[NSString alloc] initWithFormat:@"You have selected \"%@\"",rowValue];

    if(self.detailsViewController == nil){
        DetailsViewController *d = [[DetailsViewController alloc] initWithNibName:@"DetailsViewController" bundle:[NSBundle mainBundle]];

        self.detailsViewController = d;
        [d release];
    }
    [self.detailsViewController initWithTextSelected:message];
    [self.navigationController pushViewController:self.detailsViewController animated:YES];
}

@end

Answer 1

SIGABRT在大多数情况下意味着您要访问已发布的对象。

在您的情况下，我建议在[pasteBoardItems retain];方法的末尾添加第- (void)viewDidLoad行。

如何将粘贴板项目复制到表中？

1 个答案: