如何更改图像tintColor

Question

我从服务器接收图像，然后基于用户选择的颜色，图像颜色将发生变化。

我试过如下：

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

我得到了我的目标相反的（白色的UIImage外面是彩色的与所选择的颜色）。

出了什么问题？

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

Answer 1

尝试生成新的形象为自己

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。

好运

======= ======= UPDATE

该解决方案将只有所有像素的图像的变色。

实施例：我们有一个书图像：http://pngimg.com/upload/book_PNG2113.png

并运行上面的代码后（EXP：TintColor是红色）。我们有：

SO：你的形象是如何取决于你如何把它设计

Answer 2

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 3

尝试是这样的

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; 

希望这有助于。

Answer 4

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

Answer 5

在斯威夫特你可以使用这个扩展：基于@ VietHung的Objective-C的解决方案]

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

下面是我如何在Swift中应用和使用IOS 9中的色彩。

//apply a color to an image 
//ref - http://stackoverflow.com/questions/28427935/how-can-i-change-image-tintcolor 
//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

在斯威夫特3.0你可以使用这个扩展：

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上@ VietHung的Objective-C的解决方案基于]。0您可以使用此

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

在SWIFT 3.0，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

对于雨燕3.0，我做的UIImageView的自定义子类，称为TintedUIImageView。现在，像使用任何色调的颜色在界面生成器或代码

class TintedUIImageView: UIImageView { 

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

Answer 10

一两件事你可以做的，只是你的图像添加到Assets文件夹中的XCode，然后更改渲染模式，模板图像设定，所以每当你改变UIImageView的色彩颜色，它会自动改变图像。

检查此链接了 - >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