当我从大小函数内部调用Greet时,DisplayAlert会按预期显示警告但是当在事件之后从委托调用它时,它将使用正确的名称(Greet Has Called)记录到输出但DisplayAlert不显示.
public class CustomPage : ContentPage
{
...
protected override void OnValidSizeAllocated(double width,double height)
{
...
Greet("Test");
app.FB.GetName();
app.FB.NameRecieved += (s,e) =>
{
Greet(e.Name);
};
}
public void Greet(string name)
{
Utils.Log("Hey " + name);
DisplayAlert("Hey " + name,"Welcome","OK");
}
}
上面的代码输出“嘿测试”,然后出现一个警告,说“嘿测试,欢迎”,然后输出“嘿Leo”(这是正确的,因为这是来自Facebook帐户的名称)然后没有警报显示.
