macOS How to implement an alert sheet with an input text field in Cocoa?

How to implement an alert sheet with an input text field?
For example, show an alert sheet to user to input password.

I just know the simple usage of NSBeginAlertSheet, and I haven't read any article about my need. Please give me some advice or article reference. Thanks in advance.

I've found a method:
- (NSString *)input: (NSString *)prompt defaultValue: (NSString *)defaultValue {
NSAlert *alert = [NSAlert alertWithMessageText: prompt
defaultButton"OK"
alternateButton"Cancel"
otherButton:nil
informativeTextWithFormat""];

NSTextField *input = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 200, 24)];
[input setStringValue:defaultValue];
[alert setAccessoryView:input];
NSInteger button = [alert runModal];
if (button == NSAlertDefaultReturn) {
[input validateEditing];
return [input stringValue];
} else if (button == NSAlertAlternateReturn) {
return nil;
} else {
NSAssert1(NO, @"Invalid input dialog button %d", button);
return nil;
}
}

But this method's performance is not as good as I want. It's alert window is seperated from the main window. How can I make it shown like a sheet from the main window?