I think the problem is that you are testing in simulator. On device, it should work fine.
I tested this and it worked. Add an imageview with your splash image when app enters in background -
- (void)applicationDidEnterBackground:(UIApplication *)application
{
UIImageView *imageView = [[UIImageView alloc] initWithFrame:self.window.bounds];
imageView.tag = 101; // Give some decent tagvalue or keep a reference of imageView in self
// imageView.backgroundColor = [UIColor redColor];
[imageView setImage:[UIImage imageNamed:@"Default.png"]]; // assuming Default.png is your splash image's name
[UIApplication.sharedApplication.keyWindow.subviews.lastObject addSubview:imageView];
}
And when app comes back in foreground -
- (void)applicationWillEnterForeground:(UIApplication *)application
{
UIImageView *imageView = (UIImageView *)[UIApplication.sharedApplication.keyWindow.subviews.lastObject viewWithTag:101]; // search by the same tag value
[imageView removeFromSuperview];
}
NOTE - On simulator (iOS 7.0), the added subview is not show when you check by pressing home button twice (Cmd + H), but on device it works as expected (like paypal
, BofA
apps)
EDIT: (Additional info)
In addition to obscuring/replacing sensitive information by adding subview / blur as explained above, iOS 7 provides you ability to ignore the screen snapshot via ignoreSnapshotOnNextApplicationLaunch
of UIApplication
inside applicationWillResignActive
or applicationDidEnterBackground
.
UIApplication.h
// Indicate the application should not use the snapshot on next launch, even if there is a valid state restoration archive.
// This should only be called from methods invoked from State Preservation, else it is ignored.
- (void)ignoreSnapshotOnNextApplicationLaunch NS_AVAILABLE_IOS(7_0);
Also, allowScreenShot
flag can be explored in Restrictions Payload.