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[英]How to fire TouchUpInside of UIButton Programmatically in xamarin ios C#
[英]Xamarin iOS UIButton How To Click button programmatically?
我试图通过在ViewWillAppear()函数中以编程方式调用按钮来伪造单击按钮的行为。
onclick函数是在我的ViewDidLoad()中定义的,您可以看到我正在尝试使用“执行选择器”来手动调用按钮。
该按钮似乎没有在运行。 有任何想法吗?
public override void ViewDidLoad()
{
base.ViewDidLoad();
idButtonScanLoad.TouchUpInside += async (sender, ea) =>
{
System.Console.WriteLine("Scan button pressed");
};
}
[Export("TouchUpInsideEvent:")]
private void TouchUpInsideEvent(NSObject sender)
{
Console.WriteLine("yay!");
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
this.PerformSelector(new ObjCRuntime.Selector("TouchUpInsideEvent:"), this as NSObject, 10f);
}
这是答案,您应该从ViewDidLoad方法调用它。
myButton.SendActionForControlEvents (UIControlEvent.TouchUpInside);
如果要创建按钮的click事件,可以使用this
public override void ViewDidLoad()
{
Mybutton.AddTarget(ButtonEventHandler, UIControlEvent.TouchUpInside);
}
public void ButtonEventHandler(object sender, EventArgs e)
{
if(sender==Mybutton)
{
//do stuff here
}
}
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