Objective-c – Use Background Image to UINavigationController among multiple views

cocoa-touchiphoneobjective cuinavigationcontrolleruiviewcontroller

How can I use a background image for UINavigationController, while maintaining the title? The answer from ck on other thread did the trick to put the image and keep the text. But if the user navigates to other view ( using [navigationController pushViewController]), only the background appears in the new screen.

How can one change the background image for UINavigationController, while maintaining the title across multiple views?

Best Answer

create a CustomUIViewController that extends UIViewController and override viewDidLoad to something like this:

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"bg.png"]];
}

After that, use your CustomUIViewController in your controllers.

Related Solutions

Ios – Cropping an UIImage

Update 2014-05-28: I wrote this when iOS 3 or so was the hot new thing, I'm certain there are better ways to do this by now, possibly built-in. As many people have mentioned, this method doesn't take rotation into account; read some additional answers and spread some upvote love around to keep the responses to this question helpful for everyone.

Original response:

I'm going to copy/paste my response to the same question elsewhere:

There isn't a simple class method to do this, but there is a function that you can use to get the desired results: CGImageCreateWithImageInRect(CGImageRef, CGRect) will help you out.

Here's a short example using it:

CGImageRef imageRef = CGImageCreateWithImageInRect([largeImage CGImage], cropRect);
// or use the UIImage wherever you like
[UIImageView setImage:[UIImage imageWithCGImage:imageRef]]; 
CGImageRelease(imageRef);

IOS: Multi-line UILabel in Auto Layout

Use -setPreferredMaxLayoutWidth on the UILabel and autolayout should handle the rest.

[label setPreferredMaxLayoutWidth:200.0];

See the UILabel documentation on preferredMaxLayoutWidth.

Update:

Only need to set the height constraint in storyboard to Greater than or equal to, no need to setPreferredMaxLayoutWidth.

Best Answer

Related Solutions

Ios – Cropping an UIImage

IOS: Multi-line UILabel in Auto Layout

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