cocoa - 尝试访问超出数组范围的索引

// 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，并且可以正常工作
但是当我第二次点击打开按钮时，它给出了一个错误

*-[NSCFArray objectAtIndex：]：超出范围（0）的索引（0）

最佳答案

不确定是否能解决您的问题，但是不建议使用runModalForDirectory，请考虑使用runModal。

关于cocoa - 尝试访问超出数组范围的索引，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7369776/