How to add Progress bar to UIAlertController?

Question

I want to add progress bar in swift iOS 8 UIAlertController. Is this possible? Is there any way to subclass UIAlertController and add progres bar and connect some delegate funct

Answer 1

A solution with auto layout:

    UIAlertController *alertCtr = [UIAlertController alertControllerWithTitle:@"Test" message:@"50%" preferredStyle:UIAlertControllerStyleAlert];
    [alertCtr addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        // Do things
    }]];

    UIView *alertView = alertCtr.view;

    UIProgressView *progressView = [[UIProgressView alloc] initWithFrame:CGRectZero];
    progressView.progress = 0.5;
    progressView.translatesAutoresizingMaskIntoConstraints = false;
    [alertView addSubview:progressView];


    NSLayoutConstraint *bottomConstraint = [progressView.bottomAnchor constraintEqualToAnchor:alertView.bottomAnchor];
    [bottomConstraint setActive:YES];
    bottomConstraint.constant = -45; // How to constraint to Cancel button?

    [[progressView.leftAnchor constraintEqualToAnchor:alertView.leftAnchor] setActive:YES];
    [[progressView.rightAnchor constraintEqualToAnchor:alertView.rightAnchor] setActive:YES];

    [self presentViewController:alertCtr animated:true completion:nil];