How to create and get return Value from Cocoa Dialog?

Question

In my application, I want to create a dialog box with one text field, and a button, through which I can prompt user and get back user entered value.

How do I do this

Answer 1

IN OS X 10.10:

    NSAlert *alert = [[NSAlert alloc] init];
    [alert setMessageText:@"Permission denied, sudo password?"];
    [alert addButtonWithTitle:@"Ok"];
    [alert addButtonWithTitle:@"Cancel"];

    NSTextField *input = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 200, 24)];
    [input setStringValue:@""];

    [alert setAccessoryView:input];
    NSInteger button = [alert runModal];
    if (button == NSAlertFirstButtonReturn) {
        password = [input stringValue];
    } else if (button == NSAlertSecondButtonReturn) {

    }