Question

我有一个代码，根据条件是否为真，翻转图像并更改其tintColor。

func incoming(incoming: Bool) {
    let image = UIImage(named: "MessageBubble")?.imageWithRenderingMode(.AlwaysTemplate)
    var shownImage: UIImage
    // Check whether it is an incoming or outgoing message
    if incoming {

        let flippedImage = UIImage(CGImage: image!.CGImage!, scale: image!.scale, orientation: UIImageOrientation.UpMirrored)
        shownImage = flippedImage.imageWithRenderingMode(.AlwaysTemplate)
        bubbleImageView.tintColor = UIColor(red: 100/255, green: 200/255, blue: 100/255, alpha: 1)

    } else {

        shownImage = image!
        bubbleImageView.tintColor = UIColor(red: 100/255, green: 255/255, blue: 255/255, alpha: 1)


    }

    bubbleImageView.image = shownImage

}

但是，此代码不会翻转图像，但它正确应用了tintColor。如果删除了“.imageWithRenderingMode（。AlwaysTemplate）”函数，则会正确翻转图像，但不会应用tintColor。（bubbleImageView是一个UIImageView）。

else块下的代码显示正确的tintColor。

如何让图像翻转并改变颜色？

Answer 1

尝试使用此方法为图像添加颜色：

func coloredImage(image: UIImage, red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat) -> UIImage! {

    let rect = CGRect(origin: CGPointZero, size: image.size)

    UIGraphicsBeginImageContextWithOptions(image.size, false, image.scale)

    let context = UIGraphicsGetCurrentContext()

    image.drawInRect(rect)


    CGContextSetRGBFillColor(context, red, green, blue, alpha)
    CGContextSetBlendMode(context, CGBlendMode.SourceAtop)

    CGContextFillRect(context, rect)

    let result = UIGraphicsGetImageFromCurrentImageContext()

    UIGraphicsEndImageContext()

    return result


}

所以，在你的情况下，你应该这样做：

let processedImage = coloredImage(bubbleImageView, red: 100/255, green: 255/255, blue: 255/255, alpha: 1)

无法更改翻转的UIImage图像Swift 2 iOS的tintColor

1 个答案: