objective c - iOS 7 / Xcode 5: Access device launch images programmatically

Question

Is there any way to use the apps LaunchImage as a background in an universal iOS app without putting the same image resources in multiple places?

I wasn't able to access the LaunchImage files in Images.xcassets, so I created two new Image Sets "Background Portrait" and "Background Landscape" (since there seems to be no way to put landscape and portrait images into the same set).

While this workaround does the jobs, I would hate to include every image into the app twice. This also has a high maintenance cost.

Any advice on how to access the LaunchImage for the current device is appreciated.

GCOLaunchImageTransition must have done the job for iOS < 7.

question from:https://stackoverflow.com/questions/19410066/ios-7-xcode-5-access-device-launch-images-programmatically

Answer 1

You can copy/paste the following code to load your app's launch image at runtime:

// Load launch image
NSString *launchImageName;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
{
    if ([UIScreen mainScreen].bounds.size.height == 480) launchImageName = @"[email protected]"; // iPhone 4/4s, 3.5 inch screen
    if ([UIScreen mainScreen].bounds.size.height == 568) launchImageName = @"[email protected]"; // iPhone 5/5s, 4.0 inch screen
    if ([UIScreen mainScreen].bounds.size.height == 667) launchImageName = @"[email protected]"; // iPhone 6, 4.7 inch screen
    if ([UIScreen mainScreen].bounds.size.height == 736) launchImageName = @"[email protected]"; // iPhone 6+, 5.5 inch screen
}
else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
    if ([UIScreen mainScreen].scale == 1) launchImageName = @"LaunchImage-700-Portrait~ipad.png"; // iPad 2
    if ([UIScreen mainScreen].scale == 2) launchImageName = @"LaunchImage-700-Portrait@2x~ipad.png"; // Retina iPads
}
self.launchImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:launchImageName]];