How to make UIImage suitable for the entire size of the UINavigationBar

Question

I need to set a background image for the columns of the UINavigationControllerentire application, so I wrote the following code:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {

    let backgroundImage = UIImage(named: "NavBar")
    UINavigationBar.appearance().setBackgroundImage(backgroundImage, forBarMetrics: .Default)

    return true
}

However, I need to UIImagefit the size of the bar, because in my case it is too big and not suitable for the whole bar. How can i do this?

Thanks in advance.

Answer 1

It should be automatically repeated to fill the size of the navigation bar, but if you want to stretch it, you can change the set of frames in the asset catalog:

https://developer.apple.com/library/ios/recipes/xcode_help-image_catalog-1.0/chapters/SlicinganImage.html

- :

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    let backgroundImage = UIImage(named: "NavBar")?.resizableImageWithCapInsets(UIEdgeInsetsMake(0, 15, 0, 15), resizingMode: UIImageResizingMode.Stretch)

    UINavigationBar.appearance().setBackgroundImage(backgroundImage, forBarMetrics: .Default)

    return true
}

Answer 2

:

// Set the size hard coded
CGRect myFrame = CGRectMake(0,0,320,200); 
// Or you can get the size from the view
CGRect myFrame = backGroundView.frame

// Now assign the size to the image, I normally do this is an animation
[UIView beginAnimations:NULL context:NULL];
[UIView setAnimationDuration:0.5];
imageView.frame = myFrame;
[UIView commitAnimations];