How to specify size for iPhone 6/7 customised edge-to-edge image?

Question

Say I want a bundled image to take up all available screen width in an iPhone app - for example a banner. I\'d create my_banner.png with width 320px

Answer 1

In my case, I was interested in making my base view controller subclass have the same background image as my launch image.

NOTE: This approach will not work unless this is your specific requirement.

Also, even when I tried creating a background image that was the correct size for the iPhone 6 (750x1334), loading that image as a pattern image into a background color for a view ended up scaling the image up in an undesirable way.

This answer gave me the code that I needed to figure out a good solution for me.

Here's the code I got working to have my launch image match my UIViewController's background image (or vice versa):

- (void)viewDidLoad {
    [super viewDidLoad];
    UIImage *background         = [UIImage imageNamed:[self splashImageName]];
    UIColor *backgroundColor    = [UIColor colorWithPatternImage:background];
    self.view.backgroundColor   = backgroundColor;
}
- (NSString *)splashImageName {
    UIInterfaceOrientation orientation  = [[UIApplication sharedApplication] statusBarOrientation];
    CGSize viewSize                     = self.view.bounds.size;
    NSString *viewOrientation           = @"Portrait";
    if (UIDeviceOrientationIsLandscape(orientation)) {
        viewSize                        = CGSizeMake(viewSize.height, viewSize.width);
        viewOrientation                 = @"Landscape";
    }
    NSArray *imagesDict                 = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"UILaunchImages"];
    for (NSDictionary *dict in imagesDict) {
        CGSize imageSize                = CGSizeFromString(dict[@"UILaunchImageSize"]);
        if (CGSizeEqualToSize(imageSize, viewSize) && [viewOrientation isEqualToString:dict[@"UILaunchImageOrientation"]])
            return dict[@"UILaunchImageName"];
    }
    return nil;
}