This is not officially supported, but if you want to risk future iOS changes breaking your code you can try this:
Building off ayoy's answer, I built a subclass of UIRefreshControl, which sets the color of the ActivityIndicator in beginRefresing
. This should be a better place to put this, since you may call this in code instead of a user causing the animation to begin.
@implementation WhiteRefreshControl : UIRefreshControl
- (void)beginRefreshing
{
[super beginRefreshing];
NSArray *subviews = [[[self subviews] lastObject] subviews];
//Range check on subviews
if (subviews.count > 1)
{
id spinner = [subviews objectAtIndex:1];
//Class check on activity indicator
if ([spinner isKindOfClass:[UIActivityIndicatorView class]])
{
UIActivityIndicatorView *spinnerActivity = (UIActivityIndicatorView*)spinner;
spinnerActivity.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;
}
}
}