How do i make an app running on iphone 5 fit the screen of iphone 4 and 3

问题

I have a an app running on Iphone 5 and all the elements fit perfectly, I want to run the app also on Iphone 3 and Iphone 4.

I read a few articles about the Auto Sizing but I could not find any information specific for this issue.

Do I need to have a multiple Images with different sizes? Do I need to set the elements size grammatically ?

Any help guys....

Thanks.

回答1:

You need to have a multiple Images with different sizes.
You need to set the elements size programmatic ally in viewWillApear method.

-(void)viewWillAppear:(BOOL)animated
{
    if ([[UIScreen mainScreen] bounds].size.height == 568)
    {
        [splashImage setFrame:CGRectMake(0, 0, 320, 548)];
        [splashImage setImage:[UIImage imageNamed:@"splash_Image_320X568@2x.jpg"]];
    }
    else
    {
        [splashImage setFrame:CGRectMake(0, 0, 320, 460)];
        [splashImage setImage:[UIImage imageNamed:@"splash_Image_320X.jpg"]];
    }
}

回答2:

If your application is thought for iPhone 5, it will be complicated due to the smaller screen size, but here is what you have to do :

All your images are supposed to be in two sizes, classic and @2x. The classic size will be used for iPhone 3GS.
If you are already using autolayout you're ready, cross your finger and let's go.
If not, you should think about using autolayout, read some tutorial about it, but simply it allows you to design a single interface for all your screen sizes.
If you don't want to use autolayout (or if you can't), you should place all your elements directly in your code to be sure they aren't "out" the screen.

来源：https://stackoverflow.com/questions/18122401/how-do-i-make-an-app-running-on-iphone-5-fit-the-screen-of-iphone-4-and-3

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iphone

resize

autosize