Not Working for iOS 7.x version

[ParilShah]

The controller is not compatible with iOS 7.x version. Here, I have attached 2 images. 1.) Application tarts (Taken from iPhone 4s simulator - iOS 7.1), 2.) When Tap on "+" button. It disappears the view completely for iOS 7.x. In iOS 8.x version, it works fine, even after removing UIVisualEffectView.

[smehus]

The problem is with this line:

UIBlurEffect *blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView *vsview = [[UIVisualEffectView alloc]initWithEffect:blur];

UIVisualEffect's are only in ios8. You can fix this with the following:

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
    _bgView = vsview;
}