How to get the right launch image in iOS9 programmatically?

Question

I've add different size images into LaunchImage asset. While I use this code

UIImage *launchImage = [UIImage imageNamed:@"LaunchImage"]

It has returned the launchImage with the wrong size, exactly returns @2x png. When i use iphone6 plus, the expecting image is @3x png. Any idea about getting the right image?

Answer 1

After searching a lot, i found that the LaunchImages are special, and aren't actually an asset catalog on the device. And the launchImage file name for all iOS devices list as:

• LaunchImage-568h@2x.png
• LaunchImage-700-568h@2x.png
• LaunchImage-700-Landscape@2x~ipad.png
• LaunchImage-700-Landscape~ipad.png
• LaunchImage-700-Portrait@2x~ipad.png
• LaunchImage-700-Portrait~ipad.png
• LaunchImage-700@2x.png
• LaunchImage-Landscape@2x~ipad.png
• LaunchImage-Landscape~ipad.png
• LaunchImage-Portrait@2x~ipad.png
• LaunchImage-Portrait~ipad.png
• LaunchImage.png
• LaunchImage@2x.png
• LaunchImage-800-667h@2x.png (iPhone 6)
• LaunchImage-800-Portrait-736h@3x.png (iPhone 6 Plus Portrait)
• LaunchImage-800-Landscape-736h@3x.png (iPhone 6 Plus Landscape)

so if you want to get the right launch image for iphone device, just use this code:

    NSString *launchImageName;
    if([UIScreen mainScreen].bounds.size.height > 667.0f) {
        launchImageName = @"LaunchImage-800-736h"; // iphone6 plus
    }
    else if([UIScreen mainScreen].bounds.size.height > 568.0f) {
        launchImageName = @"LaunchImage-800-667h"; // iphone6
    }
    else if([UIScreen mainScreen].bounds.size.height > 480.0f){
        launchImageName = @"LaunchImage-700-568h";// iphone5/5plus
    } else {
        launchImageName = @"LaunchImage-700"; // iphone4 or below
    }
    UIImage *launchImage = [UIImage imageNamed:launchImageName];