在AlertView - Swift中调整UIActivityIndi​​catorView位置

Question

我一直在尝试调整UIAlertView中的IndicatorView的位置,但它永远不会起作用.我试图设置loadingIndicator loadingIndicator.center = CGPointMake(alert.bounds.size.width / 2, alert.bounds.size.height - 50)但它根本不适用,看看这张照片:

alert = UIAlertView(title: "Loading...", message: nil , delegate: nil, cancelButtonTitle: nil)
        loadingIndicator = UIActivityIndicatorView(frame: CGRectMake(50, 10, 37, 37))
        loadingIndicator.center = self.view.center
        loadingIndicator.hidesWhenStopped = true
        loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
        loadingIndicator.startAnimating();

        alert.setValue(loadingIndicator, forKey: "accessoryView")
        loadingIndicator.startAnimating()
        alert.show();

Answer 1

请尝试以下代码:

        var alert : UIAlertView = UIAlertView(title: "Loading...", message: nil , delegate: nil, cancelButtonTitle: nil)
        var viewBack:UIView = UIView(frame: CGRectMake(83,0,100,100))

        var loadingIndicator: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(50, 10, 37, 37))
        loadingIndicator.center = viewBack.center
        loadingIndicator.hidesWhenStopped = true
        loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
        loadingIndicator.startAnimating();
        viewBack.addSubview(loadingIndicator)
        viewBack.center = self.view.center
        alert.setValue(viewBack, forKey: "accessoryView")
        loadingIndicator.startAnimating()
        alert.show();