Transparent ViewController to See Parent Below?

Question

I would like to modally add a view controller with a transparent background, so the parent view controller beneath can be seen. (This is in an app for iPhone, not for iPad.)

Answer 1

It's possible although there are a bunch of steps which can be easily forgotten. After struggling with myself to get this working for 4 hours I came up with the following solution.

1 - Create a View Controller like any other.

Header file

#import "DDBaseViewController.h"

@interface DDHomeSearchLoadingViewController : UIViewController

@end

Implementation file

#import "DDHomeSearchLoadingViewController.h"

@interface DDHomeSearchLoadingViewController ()
@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *activityMonitor;
@property (weak, nonatomic) IBOutlet UIView *modalView;

@end

@implementation DDHomeSearchLoadingViewController

#pragma mark - UIViewController lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];


    [self setupUI];
}

-(void) setupUI
{
    [self makeRoundedCorner:self.modalView AndCornerRadius:6.0f];
    [self.activityMonitor startAnimating];

}

-(void) makeRoundedCorner:(UIView*) view AndCornerRadius:(float) cornerRadius
{
    [view.layer setCornerRadius:cornerRadius];
    [view.layer setMasksToBounds:YES];
}

@end

2 - Set your container view background color as ClearColor

3 - Add a UIView which will be presented like an overlay

4 - Add a UIView which will be presented like a Dialog Box over the overlay UIView

Make sure it's outside the overlay view when you add/move it. For some reason when you move it using the mouse it adds to overlay UIView automatically. ( Freaking annoying to be honest )

5 - Set the Storyboard ID for the View you've created

6 - Finally add this piece of code wherever you wan't call it ( Assuming it's a UiViewController too )

DDHomeSearchLoadingViewController* ddHomeSearchLoadingViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"DDHomeSearchLoadingViewController"];
self.navigationController.modalPresentationStyle = UIModalPresentationCurrentContext;
[self presentViewController:ddHomeSearchLoadingViewController animated:YES completion:nil];

I hope it helps you guys out

Cheers