How to change UINavigationBar rightButton image?

Question

I want to change UINavigationBar rightButton image in viewWillAppear and for this I'm trying this:

self.navigationController?.navigationItem.rightBarButtonItem?.image = UIImage(named: "bookmark")

but it does not change the image of my rightButton. How can I fix it and change my image?

Answer 1

try this

var changeImage:UIImage = UIImage(named: "bookmark")!
changeImage = changeImage.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
var rightButton = UIBarButtonItem(image: changeImage, style: UIBarButtonItemStyle.Bordered, target: self, action: "xxxx")
self.navigationItem.rightBarButtonItem = rightButton

Choice-2

for book mark use default function of UIBarButtonSystemItemBookmarks

var rightButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Bookmarks, target: self, action: "xxxx")
self.navigationItem.rightBarButtonItem = rightButton

some default UIBarbuttonItems are

typedef NS_ENUM(NSInteger, UIBarButtonSystemItem) {
UIBarButtonSystemItemDone,
UIBarButtonSystemItemCancel,
UIBarButtonSystemItemEdit,  
UIBarButtonSystemItemSave,  
UIBarButtonSystemItemAdd,
UIBarButtonSystemItemFlexibleSpace,
UIBarButtonSystemItemFixedSpace,
UIBarButtonSystemItemCompose,
UIBarButtonSystemItemReply,
UIBarButtonSystemItemAction,
UIBarButtonSystemItemOrganize,
UIBarButtonSystemItemBookmarks,
UIBarButtonSystemItemSearch,
UIBarButtonSystemItemRefresh,
UIBarButtonSystemItemStop,
UIBarButtonSystemItemCamera,
UIBarButtonSystemItemTrash,
UIBarButtonSystemItemPlay,
UIBarButtonSystemItemPause,
UIBarButtonSystemItemRewind,
UIBarButtonSystemItemFastForward,
UIBarButtonSystemItemUndo NS_ENUM_AVAILABLE_IOS(3_0),
UIBarButtonSystemItemRedo NS_ENUM_AVAILABLE_IOS(3_0),
UIBarButtonSystemItemPageCurl NS_ENUM_AVAILABLE_IOS(4_0),
};