cocoa - 尝试访问超出数组范围的索引

Question

// Create the File Open Dialog class.
NSOpenPanel* openDlg = [NSOpenPanel openPanel];

// Enable the selection of files in the dialog.
[openDlg setCanChooseFiles:YES];

// Enable the selection of directories in the dialog.
[openDlg setCanChooseDirectories:YES];

// Display the dialog.  If the OK button was pressed,
// process the files.

if ( [openDlg runModalForDirectory:nil file:nil] == NSOKButton )
{
    // Get an array containing the full filenames of all
    // files and directories selected.
    NSArray* files = [openDlg filenames];
    NSString *string1;
    // Loop through all the files and process them.
    for( i = 0; i < [files count]; i++)
    {
        NSString* fileName = [files objectAtIndex:i];
        // Do something with the filename.
        string1 = [[NSString alloc] initWithContentsOfFile:fileName];
        if(string1 == nil)
        {
            NSLog(@"Error reading file");
        }
        else
        {

        }
    }
}

当我第一次单击“打开”按钮时，它将打开“打开”对话框并且工作正常但是当我第二次单击“打开”按钮时，它给出了类似的错误

* -[NSCFArray objectAtIndex:]:索引 (0) 超出界限 (0)

Answer 1

不确定这是否能解决您的问题，但 runModalForDirectory 已弃用，请考虑使用 runModal相反。