Ios 导航栏按钮图像

我使用此代码在导航栏上获得徽标

override func viewDidAppear(animated: Bool) {

    let image = UIImage(named: "LogoWithTextSmaller.png")
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: image, style: UIBarButtonItemStyle.Plain, target: nil, action: nil)
    }

这很好，但标志没有任何颜色-除了“蓝色”。是因为它是一个png文件。有什么可以保留原色的吗

我已经这样做了：

self.navigationItem.titleView = UIImageView(image: image)

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这把图像带到正确的颜色的导航栏上，但是它在中间，我想在左边。

你需要声明图像始终保持原样。因此，添加如下代码

var image = UIImage(named: "image-name")
image = image?.withRenderingMode(.alwaysOriginal)
self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: image, style:.plain, target: nil, action: nil)

---

在Swift 3中，同样可以使用以下语法完成

var image = UIImage(named: "Filter")
image = image?.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(image:image , style: UIBarButtonItemStyle.plain, target: nil, action: nil)

---

Swift 3.0

let btnLogo = UIButton(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
btnLogo.setTitle("", for: .normal)
btnLogo.backgroundColor = UIColor.clear
btnLogo.layer.cornerRadius = 4.0
btnLogo.layer.masksToBounds = true

var imageLogo = UIImage(named: "LogoWithTextSmaller.png")
imageLogo = imageLogo?.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
btnLogo.setImage(imageLogo, for: .normal)

let barButton = UIBarButtonItem(customView: btnLogo)
self.navigationItem.leftBarButtonItem = barButton

var image = UIImage(named: "Filter")
image = image?.imageWithRenderingMode(UIImageRenderingMode.alwaysOriginal)

    let Navigateimage = UIImage(named: "LogoWithTextSmaller.png")
    Navigateimage = Navigateimage?.withRenderingMode(.alwaysOriginal)
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: Navigateimage, style:.plain, target: nil, action: nil)

swift 2.0

let btnLogo = UIButton(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
btnLogo.setTitle("", for: .normal)
btnLogo.backgroundColor = UIColor.clear
btnLogo.layer.cornerRadius = 4.0
btnLogo.layer.masksToBounds = true

var imageLogo = UIImage(named: "LogoWithTextSmaller.png")
imageLogo = imageLogo?.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
btnLogo.setImage(imageLogo, for: .normal)

let barButton = UIBarButtonItem(customView: btnLogo)
self.navigationItem.leftBarButtonItem = barButton

var image = UIImage(named: "Filter")
image = image?.imageWithRenderingMode(UIImageRenderingMode.alwaysOriginal)

    let Navigateimage = UIImage(named: "LogoWithTextSmaller.png")
    Navigateimage = Navigateimage?.withRenderingMode(.alwaysOriginal)
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: Navigateimage, style:.plain, target: nil, action: nil)

目标-C

 UIImage *image = [[UIImage alloc] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

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

 self.navigationItem.rightBarButtonItem= _btnLeftBar;

有关withRenderingMode（：）的详细信息，请参阅下面的apple文档链接

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在swift 3.0中

let btnLogo = UIButton(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
btnLogo.setTitle("", for: .normal)
btnLogo.backgroundColor = UIColor.clear
btnLogo.layer.cornerRadius = 4.0
btnLogo.layer.masksToBounds = true

var imageLogo = UIImage(named: "LogoWithTextSmaller.png")
imageLogo = imageLogo?.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
btnLogo.setImage(imageLogo, for: .normal)

let barButton = UIBarButtonItem(customView: btnLogo)
self.navigationItem.leftBarButtonItem = barButton

var image = UIImage(named: "Filter")
image = image?.imageWithRenderingMode(UIImageRenderingMode.alwaysOriginal)

    let Navigateimage = UIImage(named: "LogoWithTextSmaller.png")
    Navigateimage = Navigateimage?.withRenderingMode(.alwaysOriginal)
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: Navigateimage, style:.plain, target: nil, action: nil)

Swift 3 如果项目丢失，您可以尝试此操作

  let navigationBar = navigationController?.navigationBar
  let topItem = navigationBar?.topItem
  var navigateimage = UIImage(named: "addConnectionFromSupport")
  navigateimage = navigateimage?.withRenderingMode(.alwaysOriginal)
  topItem?.rightBarButtonItem = UIBarButtonItem(image: navigateimage, style:.plain, target: nil, action: nil)

---

SWIFT 4

    let back = UIImage(named: "back_white")?.withRenderingMode(.alwaysOriginal)
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: back, style:.plain, target: nil, action: nil)

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你试过换颜色吗？UINavigationBar.appearance（）.tintColor=UIColor.redColor（）我已经在导航栏上有了背景色，图像是透明的，是浅蓝色和绿色，但当我将其与LeftBarButtonim一起添加时，它会变成暗蓝色。当我使用TimeVIEW显示图像时，它很好，但是我需要把它放在左边而不是中间。你试过了吗：Self.WaveStudioTime.LeftBalutoNoTime.tTimeCuff= UICOLR.RealCor（）：是的，颜色改变了，但是颜色在PNG文件中，而不是在iOS上：（因为颜色不正确，所以它不起作用-png中有多种颜色。@bhavik shah感谢这一点，效果很好。唯一的问题是，使用的图像必须非常小才能适合导航栏，然后看起来是像素化的，特别是在6和6 plus上。有没有一种方法可以使用大图像，但设置一个框架使其适合导航栏r？您实际上可以通过一行代码实现这一点：

someBarButtonItem.image=UIImage（名为：“yourPictureName”）？.imageWithRenderingMode（UIImageRenderingMode.AlwaysOriginal）