更改图像视图图标Swift的颜色

Question

I am programming an app in XCode 7.3 for iOS 9.3, and have a menu with different icons for each cell. I am trying to make the icons white, as they are default black, but cell!.imageView?.tintColor() seems to have no effect. Is there another method I could use?

EDIT: Here's the code after @LychmanIT's suggestion:

  switch indexPath.section {

    case 0: cell?.imageView?.image = UIImage(imageLiteral: "stuff.png")
    case 1: cell?.imageView?.image = UIImage(imageLiteral: "otherstuff.png")
    case 2: cell?.imageView?.image = UIImage(imageLiteral: "menu.png")
    default: cell?.imageView?.image = UIImage(imageLiteral: "error.png")

    }

    cell!.imageView?.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)

    cell!.imageView?.tintColor = UIColor.whiteColor()

EDIT: I fixed the problem by doing this:

cell!.imageView?.image! = (cell!.imageView?.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate))!

Answer 1

Lets try this:

theImageView.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
theImageView.tintColor = UIColor.redColor()

Answer 2

In Swift 3 this method became

func withRenderingMode(_ renderingMode: UIImageRenderingMode) -> UIImage

Beside the method name, the solution proposed by LychmanIT didn't work for me because the return of withRenderingMode method needs to be reassigned to the image that is passed to the imageView like:

let newImage = theImageView.image?.withRenderingMode(.alwaysTemplate)
theImageView.image = newImage
theImageView.tintColor = .redColor

Regarding the question, it is also possible to run the .withRenderingMode method in the switch, like:

switch indexPath.section {
    case 0: cell?.imageView?.image = UIImage(imageLiteral: "stuff.png").withRenderingMode(.alwaysTemplate)
    case 1: cell?.imageView?.image = UIImage(imageLiteral: "otherstuff.png").withRenderingMode(.alwaysTemplate)
    case 2: cell?.imageView?.image = UIImage(imageLiteral: "menu.png").withRenderingMode(.alwaysTemplate)
    default: cell?.imageView?.image = UIImage(imageLiteral: "error.png").withRenderingMode(.alwaysTemplate)
    }

EDIT:

Additionally you can set the render mode of an image in Asset Catalog 's Attribute Instector in the Utilities pane.

Answer 3

imageView.image!.imageWithRenderingMode(.alwaysTemplate)
imageView.tintColor = .red

OR you can use an extension below:

import UIKit

extension UIImage {

    func overlayImage(color: UIColor) -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(self.size, false, UIScreen.main.scale)
        let context = UIGraphicsGetCurrentContext()

        color.setFill()

        context!.translateBy(x: 0, y: self.size.height)
        context!.scaleBy(x: 1.0, y: -1.0)

        context!.setBlendMode(CGBlendMode.colorBurn)
        let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
        context!.draw(self.cgImage!, in: rect)

        context!.setBlendMode(CGBlendMode.sourceIn)
        context!.addRect(rect)
        context!.drawPath(using: CGPathDrawingMode.fill)

        let coloredImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return coloredImage
    }

}