用Swift创建NSAlert

我有在Objective-C中创建和NSAlert的代码，但我现在想在Swift中创建它。

警报是确认用户想要删除文档。

我想要“删除”按钮，然后运行删除功能和“取消”只是为了关闭警报。

我如何在Swift写这个？

谢谢

NSAlert *alert = [[[NSAlert alloc] init] autorelease];
    [alert addButtonWithTitle:@"Delete"];
    [alert addButtonWithTitle:@"Cancel"];
    [alert setMessageText:@"Delete the document?"];
    [alert setinformativeText:@"Are you sure you would like to delete the document?"];
    [alert setAlertStyle:NSWarningalertStyle];
    [alert beginSheetModalForWindow:[self window] modalDelegate:self didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:) contextInfo:nil];

beginSheetModalForWindow：在OS X 10.10 Yosemite中不推荐使用modalDelegate。

斯威夫特2

func dialogoKCancel(question: String,text: String) -> Bool {
    let myPopup: NSAlert = NSAlert()
    myPopup.messageText = question
    myPopup.informativeText = text
    myPopup.alertStyle = NSAlertStyle.WarningalertStyle
    myPopup.addButtonWithTitle("OK")
    myPopup.addButtonWithTitle("Cancel")
    let res = myPopup.runModal()
    if res == NSAlertFirstButtonReturn {
        return true
    }
    return false
}

let answer = dialogoKCancel("Ok?",text: "Choose your answer.")

这将根据用户的选择返回true或false。

NSAlertFirstButtonReturn表示添加到对话框的第一个按钮，这里是“OK”。

Swift 3

func dialogoKCancel(question: String,text: String) -> Bool {
    let myPopup: NSAlert = NSAlert()
    myPopup.messageText = question
    myPopup.informativeText = text
    myPopup.alertStyle = NSAlertStyle.warning
    myPopup.addButton(withTitle: "OK")
    myPopup.addButton(withTitle: "Cancel")
    return myPopup.runModal() == NSAlertFirstButtonReturn
}

let answer = dialogoKCancel(question: "Ok?",text: "Choose your answer.")