iOS7 - contentView subview ignores center autolayout

[llaborcz]

On iOS7 I'm trying to add a view as a centered subview of the content view.

The auto layout is being ignored for whatever reason and the view is being added to x=0 on the contentview.

My code looks like this:

    _emptyFolderProgressDialog = [SDCAlertController alertControllerWithTitle:NSLocalizedString(@"Emptying Deleted Items", nil)
                                                                      message:nil
                                                               preferredStyle:[UIDevice isIos7] ? SDCAlertControllerStyleLegacyAlert : SDCAlertControllerStyleAlert];
    IndeterminateProgressView *progressView = [[IndeterminateProgressView alloc] initWithStyle:progressViewStylePurple];
    [progressView setTranslatesAutoresizingMaskIntoConstraints:NO];
    [progressView startAnimating];
    [_emptyFolderProgressDialog.contentView addSubview:progressView];
    [progressView sdc_horizontallyCenterInSuperview];
    [progressView sdc_verticallyCenterInSuperviewWithOffset:kProgressDialogVerticalOffset];

But what I am getting on screen is this shown below.

On iOS8 this problem does not exist, and the progress indicator is rendered in the center of the view.

[sberrevoets]

I didn't think the solution I came up with was possible at first, but I tried and didn't notice anything wrong. Please try it out, and see if this works for you.

Note: your check for iOS 7 in the preferred style is unnecessary. The controller will select the legacy style automatically on iOS 7.

[llaborcz]

Thanks for the feedback - I'll give this a try next week.