ios - 如何将自定义 NOT TINTED 图像添加到 UIBarButtonItem

Question

我想向 UIBarButtonItem 添加图像。

我的代码:

        let button1 = UIBarButtonItem(image: UIImage(named: "icon1"), style: .Plain, target: self, action: "Onb1ClickListener")
    let button2 = UIBarButtonItem(image: UIImage(named: "icon2"), style: .Plain, target: self, action: "Onb2ClickListener")
    let button3 = UIBarButtonItem(image: UIImage(named: "icon3"), style: .Plain, target: self, action: "Onb3ClickListener")

    self.navigationItem.setRightBarButtonItems([button1, button2, button3], animated: false)
    self.navigationItem.setHidesBackButton(true, animated: false)

1. 这有效，但我得到的是蓝色图像。我怎样才能得到没有着色的原始图像？

2. 如何将图像添加到 UINavigationBar 的左侧(不是栏按钮只是图像)？

谢谢

Answer 1

UIBarButtonItem 中的默认图像渲染情况是 UIImageRenderingMode.AlwaysTemplate。因此，您必须使用 UIImageRenderingMode.AlwaysOriginal 的渲染选项创建一个图像，并将该图像设置为 UIBarButtonItem。所以:

let customImage = UIImage(named: "icon1")?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
let button1 = UIBarButtonItem(image: customImage, style: .Plain, target: self, action: "Onb1ClickListener")