选择后,我想在UITabBar中用另一种颜色替换它。目的是获得一张我可以以编程方式更改颜色的图像。
我该怎么做?
let tabBarItem = UITabBarItem(title: menuName, image: unselectedImage, selectedImage: selectedImage)
我检查了票,但没有成功:link1,link2
最佳答案
我遇到了同样的问题。您应该创建一个背景白色png,并将其他图像放在顶部
具有半透明的背景png。
(而且我认为您应该使用质量更好的图像,因为您的图片看起来很奇怪)
let iconWhite: UIImage? = self.load(fileName: "APP/icones/\(iconName).png")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
//UNSELECT IMAGE
var unselectedImgBack = UIImage(named: "white.png")
var unselectedImgFront = iconWhite?.overlayImage(color: UIColor.black)
let size = unselectedImgFront?.size
unselectedImgBack = unselectedImgBack?.resized(to: size!)
UIGraphicsBeginImageContext(size!)
let areaSize = CGRect(x: 0, y: 0, width: size!.width, height: size!.height)
unselectedImgBack!.draw(in: areaSize)
unselectedImgFront!.draw(in: areaSize, blendMode: .normal, alpha: 1)
unselectedImgFront = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
let unselectedImage = unselectedImgFront!.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
//SELECT IMAGE
var selectedImgBack = UIImage(named: "white.png")
var selectedImgFront = iconWhite
let scanner2 = Scanner(string: color)
var value: UInt64 = 0
if scanner2.scanHexInt64(&value) {
print("Decimal: \(value)")
print("Hex: 0x\(String(value, radix: 16))")
}
selectedImgBack = selectedImgBack?.overlayImage(color: UIColor.init(rgb: Int(value)))
selectedImgBack = selectedImgBack?.resized(to: size!)
UIGraphicsBeginImageContext(size!)
selectedImgBack!.draw(in: areaSize)
selectedImgFront!.draw(in: areaSize, blendMode: .normal, alpha: 0.8)
selectedImgFront = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
let selectedImage = selectedImgFront!.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
关于ios - iOS:如何在TabBar的UIImage中将特定颜色替换为另一种颜色(选择和取消选择)?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63745871/