如何更改图像 tintColor

Question

我正在从服务器接收图像，然后根据用户选择的颜色，图像颜色会发生变化。

我尝试了以下方法：

_sketchImageView.image = [_sketchImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[_sketchImageView setTintColor:color];

我得到了与我的目标相反的结果（UIImage 外面的白色是用所选颜色着色的）。

出了什么问题？

我需要在这个问题上做同样的事情，提供的解决方案不能解决我的问题。 How can I change image tintColor in iOS and WatchKit

Answer 1

你可以试试：

 _sketchImageView.image = [self imageNamed:@"imageName" withColor:[UIColor blackColor]];

 - (UIImage *)imageNamed:(NSString *)name withColor:(UIColor *)color
 {
     // load the image
     //NSString *name = @"badge.png";
     UIImage *img = [UIImage imageNamed:name];

     // begin a new image context, to draw our colored image onto
     UIGraphicsBeginImageContext(img.size);

     // get a reference to that context we created
     CGContextRef context = UIGraphicsGetCurrentContext();

     // set the fill color
     [color setFill];

    // translate/flip the graphics context (for transforming from CG* coords to UI* coords
    CGContextTranslateCTM(context, 0, img.size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    // set the blend mode to color burn, and the original image
    CGContextSetBlendMode(context, kCGBlendModeColorBurn);
    CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height);
    CGContextDrawImage(context, rect, img.CGImage);

    // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle
    CGContextClipToMask(context, rect, img.CGImage);
    CGContextAddRect(context, rect);
    CGContextDrawPath(context,kCGPathFill);

    // generate a new UIImage from the graphics context we drew onto
    UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    //return the color-burned image
    return coloredImg;
}

Answer 2

尝试这样的事情

UIImage *originalImage = _sketchImageView.image
UIImage *newImage = [originalImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,50,50)]; // your image size
imageView.tintColor = [UIColor redColor];  // or whatever color that has been selected
imageView.image = newImage;
_sketchImageView.image = imageView.image;

希望对您有所帮助。

Answer 3

尝试在图像视图的父视图上设置色调颜色。例如。 [self.view setTintColor:color];

Answer 4

尝试为自己生成新图像

UIImage *newImage = [_sketchImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIGraphicsBeginImageContextWithOptions(image.size, NO, newImage.scale);
[yourTintColor set];
[newImage drawInRect:CGRectMake(0, 0, image.size.width, newImage.size.height)];
newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

_sketchImageView.image = newImage;

并使用它。

祝你好运

=======更新=======

此解决方案将仅改变所有像素图像的颜色。

示例：我们有一张书的图片：http://pngimg.com/upload/book_PNG2113.png

并且在运行上面的代码之后（exp：TintColor 是红色的）。我们有：

SO: 你的形象取决于你的设计方式

Answer 5

在 Swift 中，您可以使用此扩展：[基于@VietHung 的 objective-c 解决方案]

Swift 5:

extension UIImage {
      func imageWithColor(color: UIColor) -> UIImage? {
        var image = withRenderingMode(.alwaysTemplate)
        UIGraphicsBeginImageContextWithOptions(size, false, scale)
        color.set()
        image.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        image = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return image
    }
}

上一个Swift版本：

extension UIImage {
    func imageWithColor(color: UIColor) -> UIImage? {
        var image = imageWithRenderingMode(.AlwaysTemplate)
        UIGraphicsBeginImageContextWithOptions(size, false, scale)
        color.set()
        image.drawInRect(CGRect(x: 0, y: 0, width: size.width, height: size.height))
        image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

Answer 6

以下是我在 IOS 9 和 Swift 中应用和使用色调的方法。

//apply a color to an image
//ref - 
//ref - https://www.captechconsulting.com/blogs/ios-7-tutorial-series-tint-color-and-easy-app-theming
func getTintedImage() -> UIImageView {

    var image     : UIImage;
    var imageView : UIImageView;

    image = UIImage(named: "someAsset")!;
    let size  : CGSize = image.size;
    let frame : CGRect = CGRectMake((UIScreen.mainScreen().bounds.width-86)/2, 600, size.width, size.height);

    let redCover : UIView = UIView(frame: frame);

    redCover.backgroundColor = UIColor.redColor();
    redCover.layer.opacity = 0.75;

    imageView       = UIImageView();
    imageView.image = image.imageWithRenderingMode(UIImageRenderingMode.Automatic);

    imageView.addSubview(redCover);

    return imageView;
}

Answer 7

在 Swift 3.0 中，您可以使用此扩展：[基于@VietHung 的 objective-c 解决方案]

extension UIImage {
    func imageWithColor(_ color: UIColor) -> UIImage? {
        var image = imageWithRenderingMode(.alwaysTemplate)
        UIGraphicsBeginImageContextWithOptions(size, false, scale)
        color.set()
        image.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

Answer 8

在 swift 2.0 中你可以使用这个

let image = UIImage(named:"your image name")?.imageWithRenderingMode(.AlwaysTemplate)
let yourimageView.tintColor = UIColor.redColor()
yourimageView.image = image

在 swift 3.0 中你可以使用这个

let image = UIImage(named:"your image name")?.withRenderingMode(.alwaysTemplate)
let yourimageView.tintColor = UIColor.red
yourimageView.image = image

Answer 9

对于 Swift 3.0，我制作了一个名为 TintedUIImageView 的 UIImageView 的自定义子类。现在图像使用界面生成器或代码中设置的任何色调颜色

class TintedUIImageView: UIImageView {

    override func awakeFromNib() {
        if let image = self.image {
            self.image = image.withRenderingMode(.alwaysTemplate)
        }
    }
}

Answer 10

你可以做的一件事是，只需将图像添加到 XCode 中的 Assets 文件夹，然后将渲染模式更改为模板图像，这样每当你更改 UIImageView 的色调时，它会自动进行更改图像。

检查此 link -> https://www.google.co.in/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiM0YXO0ejTAhUIQ48KHfGpBpgQjRwIBw&url=https%3A%2F%2Fkrakendev.io%2Fblog%2F4-xcode-asset-catalog-secrets-you-need-to-know&psig=AFQjCNGnAzVn92pCqM8612o1R0J9q1y7cw&ust=1494619445516498

Answer 11

in Swift 4 你可以像这样简单地做一个扩展：

import UIKit

extension UIImageView {

    func tintImageColor(color: UIColor) {
        guard let image = image else { return }
        self.image = image.withRenderingMode(UIImageRenderingMode.alwaysTemplate)
        self.tintColor = color
    }

}

Answer 12

- SWIFT 4

extension UIImage {
    func imageWithColor(_ color: UIColor) -> UIImage? {
        var image: UIImage? = withRenderingMode(.alwaysTemplate)
        UIGraphicsBeginImageContextWithOptions(size, false, scale)
        color.set()
        image?.draw(in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
        image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

Answer 13

let image = UIImage(named: "i m a g e   n a m e")?.withRenderingMode(.alwaysTemplate)
imageView.tintColor = UIColor.white // Change to require color 
imageView.image = image

Answer 14

试试这个

iOS 13.4及以上

UIImage *image = [UIImage imageNamed:@"placeHolderIcon"];
[image imageWithTintColor:[UIColor whiteColor] renderingMode: UIImageRenderingModeAlwaysTemplate];

如何更改图像 tintColor

How can I change image tintColor

objective-c

uiimage

uicolor

tintcolor

ios

- SWIFT 4