xcode - NSAlert 多个按钮

Question

我有一个带有两个按钮的 NSAlert:

var al = NSAlert()
al.informativeText = "You earned \(finalScore) points"
al.messageText = "Game over"
al.showsHelp = false
al.addButtonWithTitle("New Game")
al.runModal()

它运行完美，但我不知道如何识别用户按下了哪个按钮。

Answer 1

runModal 将返回 "the constant positionally identifying the button clicked."

This是如何定义与您的按钮关联的值:

enum {
   NSAlertFirstButtonReturn   = 1000,
   NSAlertSecondButtonReturn   = 1001,
   NSAlertThirdButtonReturn   = 1002
};

所以，基本上你应该做的是:

NSModalResponse responseTag = al.runModal();
if (responseTag == NSAlertFirstButtonReturn) {
   ...
} else {
   ...