Question

我是Swift的新手，所以无法解决问题，请指导我

使用它像

 UIView.animateWithDuration(duration, delay: 0.0, options: option, animations: { () -> Void in
        self.btnCallButton.hidden = true
       }, completion: nil)

并显示以下错误

Cannot invoke 'animateWithDuration' with an argument list of type '(Float, delay: FloatLiteralConvertible, options: UIViewAnimationOptions, animations: () -> Void, completion: NilLiteralConvertible)'

请提供所需的建议，并提供一些描述swift

中的块的链接

Answer 1

隐藏在Swift中无法动画。如果您想通过淡入/淡出来隐藏/显示，请使用以下代码进行淡出

 UIView.animateWithDuration(duration, delay: 0.0, options:
        options, animations: {

            self.btnCallButton.hidden = false
            self.btnCallButton.alpha = 0.0

        }, completion: { finished in

            self.btnCallButton.hidden = true
    })

并关注fadein

UIView.animateWithDuration(duration, delay: 0.0, options:
        options, animations: {

            self.btnCallButton.hidden = false
            self.btnCallButton.alpha = 1.0

        }, completion: { finished in

    })

Answer 2

在结束时添加return为

UIView.animateWithDuration(duration, delay: 0.0, options: option, animations: { () -> Void in
    self.btnCallButton.hidden = true
    return;
   }, completion: nil)

Answer 3

像这样：

public delegate void InvokeDelegate();

new Thread(delegate ()
{
    while (!DL.HasExited)
    {
        Thread.Sleep(500);
    }

    File.Delete(folderBrowserDialog1.SelectedPath + @"\Steam\steamcmd.zip");
    //The code below this note is the problem
    button1.BeginInvoke(new InvokeDelegate(InvokeMethod));

}).Start();

public void InvokeMethod()
{
   button1.Text = "START DOWNLOADING";
   button1.Enabled = true;
}

使用＆＃39; animateWithDuration＆＃39;时出现错误

3 个答案: