Question

我想更改viewWillAppear中的UINavigationBar rightButton图片，为此我正在尝试这个：

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

但它不会改变我的rightButton的图像。如何修复它并更改我的图像？

Answer 1

试试这个

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

<强>选择-2

用于书签使用默认功能UIBarButtonSystemItemBookmarks

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

某些默认UIBarbuttonItems是

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),
};

Answer 2

self.navigationController？.navigationItem.rightBarButtonItem？.image = UIBarButtonItem（image：// Image Name，style：UIBarButtonItemStyle.Plain，target：self，action：// ACTION NAME）

Answer 3

试试这个，我是swift的新手，这就是我在Objective C中完成此代码的原因。

UIButton *btnRight = [UIButton buttonWithType:UIButtonTypeCustom];


[btnRight setFrame : CGRectMake(0, 0, 60, 35)];

[btnRight setImage:[UIImage imageNamed:@"prefferedImage"] forState:UIControlStateNormal];
[btnRight addTarget:self action:@selector(defindeActionMethod:) forControlEvents:UIControlEventTouchUpInside];

[btnRight setContentHorizontalAlignment:UIControlContentHorizontalAlignmentRight];

btnRight.imageView.contentMode = UIViewContentModeScaleAspectFit;
btnRight.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;
btnRight.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

UIBarButtonItem *rightBarButton = [[UIBarButtonItem alloc] initWithCustomView:btnRight];
[rightBarButton setTintColor:[UIColor whiteColor]];
self.navigationItem.rightBarButtonItem = rightBarButton;

如何改变UINavigationBar rightButton图片？

3 个答案: