Recursive view search for condition

SCFindSubviewForCondition.m

typedef BOOL(^SCConditionBlock)(UIView *subview);
UIView * SCFindSubviewForCondition(UIView *view, SCConditionBlock conditionBlock);
UIView * SCFindSubviewForCondition(UIView *view, SCConditionBlock conditionBlock) {
    NSCParameterAssert(view != nil);
    if (conditionBlock(view)) {
        return view;
    }

    let subviews = [view subviews];

    __block UIView *satisfiedView = nil;
    [subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        satisfiedView = SCFindSubviewForCondition(obj, conditionBlock);
        if (satisfiedView) {
            *stop = YES;
        }
    }];

    return satisfiedView;
}