Adding Activity Indicator to UIAlertView - swift

Question

I'm trying to add UIActivityIndicatorView to UIAlertView but couldn't get it done. I have seen posts on this implementation and found out that it works only for versions below iOS7.
Below is the code I've tried...
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();
Is there anything specific thing to do for iOS7 and above to get this done?

Answer 1

try this code!!
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();
I hope I helped you

Answer 2

For swift 4
Create an alert controller extension
extension UIAlertController {
private struct ActivityIndicatorData {
static var activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
}
func addActivityIndicator() {
let vc = UIViewController()
vc.preferredContentSize = CGSize(width: 40,height: 40)
ActivityIndicatorData.activityIndicator.color = UIColor.blue
ActivityIndicatorData.activityIndicator.startAnimating()
vc.view.addSubview(ActivityIndicatorData.activityIndicator)
self.setValue(vc, forKey: "contentViewController")
}
func dismissActivityIndicator() {
ActivityIndicatorData.activityIndicator.stopAnimating()
self.dismiss(animated: false)
}
}
Create Var a ctivityIndicatorAlert in your view controller and write display and dismiss methods in view controller like below
var activityIndicatorAlert: UIAlertController?
func displayActivityIndicatorAlert() {
activityIndicatorAlert = UIAlertController(title: NSLocalizedString("Loading", comment: ""), message: NSLocalizedString("PleaseWait", comment: "") + "...", preferredStyle: UIAlertController.Style.alert)
activityIndicatorAlert!.addActivityIndicator()
var topController:UIViewController = UIApplication.shared.keyWindow!.rootViewController!
while ((topController.presentedViewController) != nil) {
topController = topController.presentedViewController!
}
topController.present(activityIndicatorAlert!, animated:true, completion:nil)
}
func dismissActivityIndicatorAlert() {
activityIndicatorAlert!.dismissActivityIndicator()
activityIndicatorAlert = nil
}
You can also add UIViewcontroller extension For globally available above all methods.
extension UIViewController {
private struct activityAlert {
static var activityIndicatorAlert: UIAlertController?
}
//completion : ((Int, String) -> Void)?)
func displayIPActivityAlert(_ onCancel : (()-> Void)?) {
activityAlert.activityIndicatorAlert = UIAlertController(title: NSLocalizedString("Loading...", comment: ""), message: nil , preferredStyle: UIAlertController.Style.alert)
activityAlert.activityIndicatorAlert!.addActivityIndicator()
var topController:UIViewController = UIApplication.shared.keyWindow!.rootViewController!
while ((topController.presentedViewController) != nil) {
topController = topController.presentedViewController!
}
activityAlert.activityIndicatorAlert!.addAction(UIAlertAction.init(title:NSLocalizedString("Cancel", comment: ""), style: .default, handler: { (UIAlertAction) in
self.dismissIPActivityAlert()
onCancel?()
}))
topController.present(activityAlert.activityIndicatorAlert!, animated:true, completion:nil)
}
func dismissIPActivityAlert() {
activityAlert.activityIndicatorAlert!.dismissActivityIndicator()
activityAlert.activityIndicatorAlert = nil
}
}

Answer 3

For those using Objective-C. My solution wraps the UIActivityIndicatorView with a bigger view so the margin to the edge of UIAlertView is not so small.
#import "UIAlertView+ActivityIndicator.h"
#implementation UIAlertView (ActivityIndicator)
+ (UIAlertView *)alertViewWithActivityIndicator:(NSString *)title delegate:(id<UIAlertViewDelegate>)delegate;
{
UIAlertView *a = [[UIAlertView alloc] initWithTitle:title
message:nil
delegate:delegate
cancelButtonTitle:nil
otherButtonTitles:nil];
UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
UIActivityIndicatorView *aiv = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
aiv.translatesAutoresizingMaskIntoConstraints = NO;
[v addSubview:aiv];
[v addConstraint:[NSLayoutConstraint constraintWithItem:aiv
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:v
attribute:NSLayoutAttributeCenterX
multiplier:1.0
constant:0]];
[v addConstraint:[NSLayoutConstraint constraintWithItem:aiv
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:v
attribute:NSLayoutAttributeCenterY
multiplier:1.0
constant:0]];
[aiv startAnimating];
[a setValue:v forKey:#"accessoryView"];
return a;
}
#end

Answer 4

The accepted answer in Swift 3:
var alert: UIAlertView = UIAlertView(title: "Title", message: "Please wait...", delegate: nil, cancelButtonTitle: "Cancel");
let loadingIndicator = UIActivityIndicatorView(frame: CGRect(x:50, y:10, width:37, height:37))
loadingIndicator.center = self.view.center;
loadingIndicator.hidesWhenStopped = true
loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.gray
loadingIndicator.startAnimating();
alert.setValue(loadingIndicator, forKey: "accessoryView")
loadingIndicator.startAnimating()
alert.show();