I noticed that when I place a white or black UIImage into a UISegmentedControl it automatically color masks it to match the tint of the segmented control. I thought this was really cool, and was wondering if I could do this elsewhere as well. For example, I have a bunch of buttons that have a uniform shape but varied colors. Instead of making a PNG for each button, could I somehow use this color masking to use the same image for all of them but then set a tint color or something to change their actual color?


当前回答

我有一个问题,掩蔽图像在突出显示的状态。我不希望发生这种事。如果你有同样的问题,看看这个:adjustsImageWhenHighlighted = false

其他回答

为了让tintColor影响UIImage,你必须将图像渲染模式设置为UIImageRenderingModeAlwaysTemplate。以下是Swift中的解决方案:

let image = UIImage(named: "image-name")
let button = UIButton()
button.setImage(image?.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate), forState: .Normal)
button.tintColor = UIColor.whiteColor()

快4倍

button.setImage(image.withRenderingMode(UIImage.RenderingMode.alwaysTemplate), for: .normal)
button.tintColor = UIColor.blue

你应该试试

设置好框架后

NSArray *arr10 =[NSArray arrayWithObjects:btn1,btn2,nil];
for(UIButton *btn10 in arr10)
{
CAGradientLayer *btnGradient2 = [CAGradientLayer layer];
btnGradient2.frame = btn10.bounds;

btnGradient2.colors = [NSArray arrayWithObjects:
                       (id)[[UIColor colorWithRed:151.0/255.0f green:206.0/255.5 blue:99.0/255.0 alpha:1] CGColor],
                       (id)[[UIColor colorWithRed:126.0/255.0f green:192.0/255.5 blue:65.0/255.0 alpha:1]CGColor],
                       nil];
[btn10.layer insertSublayer:btnGradient2 atIndex:0];

}

自定义按钮以各自的图像颜色显示。在故事板中将按钮类型设置为“System”(或者在代码中设置为UIButtonTypeSystem),将以默认的色调呈现按钮的图像。

(在iOS9, Xcode 7.3上测试)

如果你有一个带有背景图像的自定义按钮。您可以设置您的按钮的色调颜色和覆盖以下图像。

在资产中选择你想设置色调的按钮背景。

在图像的属性检查器中设置渲染值为“Template image”

现在当你setbutton时。tintColor = UIColor。红色“您”按钮将以红色显示。

如果你在ios15之后到达这里,你使用的是新的UIButton。配置api,那么您可能需要通过imageColorTransformer来实现。

看起来是这样的:

configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in .green }

为了方便,你可以创建一个扩展:

extension UIButton.Configuration {
    func imageColor(_ color: UIColor) -> UIButton.Configuration {
        var configuration = self
        configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in color }
        return configuration
    }
}

// Usage:
configuration = configuration.imageColor(.green)

与其他答案一样,图像本身必须在Xcode资产中“渲染为模板图像”,或者在code image. withrenderingmode (.alwaysTemplate)中


小贴士: 如果您想在按钮高亮显示时改变图像颜色,该怎么办?然后你的配置扩展看起来像这样:

func imageColor(whenNormal: UIColor,
                whenHighlighted: UIColor,
                isHighlighted: Bool) -> UIButton.Configuration {
    var configuration = self
    configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in
        isHighlighted ? whenHighlighted : whenNormal
    }
    return configuration
}

这个本身必须从configurationUpdateHandler上下文中调用,就像这样:

someButton.configurationUpdateHandler = { button in
    guard var configuration = button.configuration else {  return }
    configuration.image = UIImage(named: "some_image")
    configuration = configuration.imageColor(whenNormal: .green,
                                             whenHighlighted: .green.withAlphaComponent(0.7),
                                             isHighlighted: button.isHighlighted)
    button.configuration = configuration
}

注意,您还可以在configurationUpdateHandler中根据按钮状态定义不同的映像。