Objective c 如何在导航栏按钮项中添加自定义图像？

这是我的应用程序的代码，我需要在此按钮上添加图像吗

请帮助我。

请尝试以下代码：

 UIBarButtonItem *doneitem=[[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(donePressed:)]autorelease];
    self.navigationItem.rightBarButtonItem=doneitem;

请尝试以下代码：

UIButton *urButton = [UIButton buttonWithType:UIButtonTypeCustom];
urButton.frame = urRequiredFrame;
[urButton setImage:urImage forState:UIControlStateNormal];
[urButton addTarget:self action:@selector(donePressed:)
     forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *doneButton =[[UIBarButtonItem alloc] initWithCustomView:urButton];
self.navigationItem.rightBarButtonItem=doneButton;

一个简单的方法：

 UIBarButtonItem *_btn=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"XXXXXXX.png"] 
                                                  style:UIBarButtonItemStylePlain 
                                                  target:self 
                                                  action:@selector(yourMethod)];

self.navigationItem.rightBarButtonItem=_btn;

---

然后，如果您需要不止一个按钮，您可以将另一个

UIBarButtonItem

添加到

initWithObjects

，以防任何人需要Swift代码获得公认答案：

UIImage* customImg = [UIImage imageNamed:@"custom-img.png"];

UIBarButtonItem *_customButton = [[UIBarButtonItem alloc] initWithImage:customImg style:UIBarButtonItemStyleDone target:nil action:nil];

self.navigationItem.rightBarButtonItems = [[NSArray alloc] initWithObjects:_customButton, nil];

---

p.S.Gurpret Singh answer仅适用于透明PNG，我还必须设置按钮的颜色，而不是clearColor。

执行此操作。更简单。

将映像文件放在项目目录中

将文件添加到Xcode（右键单击Xcode项目，将文件添加到“项目名称”）

在故事板中选择你的UIBarButtonItem

点击“图片”，找到你的图片（见截图）

庆祝吧，因为它将完美地工作，并且不需要不必要的代码

以在屏幕上拾取。要保持现有按钮的当前状态，请重新使用目标和操作

let infoImage = UIImage(named: "my-icon-32.png")
let imgWidth = infoImage?.size.width
let imgHeight = infoImage?.size.height
let button:UIButton = UIButton(frame: CGRect(x: 0,y: 0,width: imgWidth!, height: imgHeight!))
button.setBackgroundImage(infoImage, forState: .Normal)
button.addTarget(self, action: Selector("openInfo"), forControlEvents: UIControlEvents.TouchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)

---

在Swift中

使用渲染模式（UIImage.RenderingMode.alwaysOriginal）的

的其他解决方案
方法如下：

SEL selector = self.navigationItem.rightBarButtonItem.action;
id target = self.navigationItem.rightBarButtonItem.target;
UIBarButtonItem *_btn=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"icon_close.png"]
                                                      style:UIBarButtonItemStylePlain
                                                     target:target
                                                     action:selector];

self.navigationItem.rightBarButtonItem = _btn;

这是对我有用的。我发现30x30是导航栏按钮的合适尺寸。UIImage会自动缩放到按钮大小

let img = UIImage(named: "picture")!.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
let leftBarButtonItem = UIBarButtonItem(image: img, style: UIBarButtonItem.Style.plain, target: self, action: nil)
self.navigationItem.leftBarButtonItem = leftBarButtonItem

它工作得很好，但当我点击按钮时，应用程序崩溃，模拟器突然退出。我如何才能做到这一点，并且不丢失故事板中按钮定义的Segue操作？Renato：给Segue一个名称并调用
[self-performsguewithidentifier:@“yourSegueName”发送者：self]在按钮的目标操作中。urRequiredFrame是您希望按钮位于的帧，urImage是您希望的图像，因为按钮的图像必须测量按钮是否与@onmyway133一致。答案很简单，很有帮助。没错，这让事情变得简单多了。我这样做了，我的图像显示的是一个平坦的蓝色矩形，而不是我从项目中选择的图像。有什么想法吗？为了回答我自己的评论，我没有在.png图像文件中正确设置alpha，我必须用GIMP修改它，将白色设置为alpha。如何以这种方式为选定/未选定状态提供两个单独的图像
let infoImage = UIImage(named: "my-icon-32.png")
let imgWidth = infoImage?.size.width
let imgHeight = infoImage?.size.height
let button:UIButton = UIButton(frame: CGRect(x: 0,y: 0,width: imgWidth!, height: imgHeight!))
button.setBackgroundImage(infoImage, forState: .Normal)
button.addTarget(self, action: Selector("openInfo"), forControlEvents: UIControlEvents.TouchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)

SEL selector = self.navigationItem.rightBarButtonItem.action;
id target = self.navigationItem.rightBarButtonItem.target;
UIBarButtonItem *_btn=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"icon_close.png"]
                                                      style:UIBarButtonItemStylePlain
                                                     target:target
                                                     action:selector];

self.navigationItem.rightBarButtonItem = _btn;

let img = UIImage(named: "picture")!.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
let leftBarButtonItem = UIBarButtonItem(image: img, style: UIBarButtonItem.Style.plain, target: self, action: nil)
self.navigationItem.leftBarButtonItem = leftBarButtonItem

UIImage *image = [UIImage imageNamed:@"XXXXXXXXXX"];
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
[button setBackgroundImage:image forState:UIControlStateNormal];
[button addTarget:self action:@selector(someAction) forControlEvents:UIControlEventTouchUpInside];
button.adjustsImageWhenHighlighted = NO;
UIBarButtonItem *rightButton =[[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.rightBarButtonItem = rightButton;

   let sliderImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 30))
    sliderImageView.contentMode = .ScaleAspectFit
    sliderImageView.image = UIImage(named: "sliderMenu")

    OR

    var sliderImage = UIImage(named: "sliderMenu")
    navigationItem.leftBarButtonItem?.image = sliderImage