MAC：NSAlert

1.1 初始化NSAlert

NSAlert *alert = [[NSAlert alloc] init];

[alert addButtonWithTitle:@"我知道了"];

[alert setMessageText:text];

[alert setInformativeText:informativeText];

[alert setAlertStyle:NSWarningAlertStyle];

[alert runModal];

ps:NSAlert 会卡住主线程