swift - 向 UIAlertView 添加事件指示器

Question

我正在尝试将 UIActivityIndi​​catorView 添加到 UIAlertView 但无法完成。我看过有关此实现的帖子，发现它仅适用于 iOS7 以下的版本。

下面是我试过的代码...

var alert: UIAlertView = UIAlertView(title: "Title", message: "Please wait...", delegate: nil, cancelButtonTitle: "Cancel");

var loadingIndicator: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(0.0, 0.0, 10.0, 10.0)) as UIActivityIndicatorView
loadingIndicator.center = self.view.center;
loadingIndicator.hidesWhenStopped = true
loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
loadingIndicator.startAnimating();

alert.addSubview(loadingIndicator);  
alert.show();

对于 iOS7 及更高版本，是否有任何特定的事情可以完成？

Answer 1

试试这个代码!!

var alert: UIAlertView = UIAlertView(title: "Title", message: "Please wait...", delegate: nil, cancelButtonTitle: "Cancel")


var loadingIndicator: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRect(x: 50, y: 10, width: 37, height: 37)) as UIActivityIndicatorView
loadingIndicator.center = self.view.center
loadingIndicator.hidesWhenStopped = true
loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
loadingIndicator.startAnimating();

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

alert.show();

希望对你有帮助