Log*_*ire 265 iphone uibutton uisegmentedcontrol ios ios7
我注意到,当我将白色或黑色UIImage放入其中时,UISegmentedControl它会自动对其进行颜色遮罩,以匹配分段控件的色调.我觉得这真的很酷,想知道我是否也可以在其他地方做到这一点.例如,我有一堆按钮,它们具有统一的形状但颜色各异.我不是为每个按钮制作一个PNG,而是以某种方式使用这种颜色遮罩来为所有这些使用相同的图像,但是然后设置一种色彩或某种东西来改变它们的实际颜色?
Ric*_*tos 578
从iOS 7开始,有一种新方法可UIImage用于指定渲染模式.使用渲染模式UIImageRenderingModeAlwaysTemplate将允许图像颜色由按钮的色调控制.
Objective-C的
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
UIImage *image = [[UIImage imageNamed:@"image_name"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[button setImage:image forState:UIControlStateNormal];
button.tintColor = [UIColor redColor];
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迅速
let button = UIButton(type: .custom)
let image = UIImage(named: "image_name")?.withRenderingMode(.alwaysTemplate)
button.setImage(image, for: .normal)
button.tintColor = UIColor.red
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auc*_*uco 81
自定义按钮以各自的图像颜色显示.在故事板(或UIButtonTypeSystem代码中)中将按钮类型设置为"系统" ,将使用默认的色调颜色呈现按钮的图像.
(在iOS9上测试,Xcode 7.3)
小智 39
您必须将图像渲染模式设置为UIImageRenderingModeAlwaysTemplate,以便tintColor影响UIImage.这是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()
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Ilk*_*aci 25
如果您有一个带背景图像的自定义按钮.您可以设置按钮的色调颜色并覆盖图像.
在资源中,选择要设置色调颜色的按钮背景.
在图像集的属性检查器中,值呈现为"模板图像"
现在无论何时设置button.tintColor = UIColor.red,按钮都会以红色显示.
hen*_*dmg 17
在Swift中你可以这样做:
var exampleImage = UIImage(named: "ExampleImage.png")?.imageWithRenderingMode(.AlwaysTemplate)
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然后在你的viewDidLoad中
exampleButtonOutlet.setImage(exampleImage, forState: UIControlState.Normal)
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并修改颜色
exampleButtonOutlet.tintColor = UIColor(red: 1, green: 0, blue: 0, alpha: 1) //your color
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编辑Xcode 8
现在你也可以只将.xcassets中图像的渲染模式转换为模板图像,然后你就不需要再在其中专门声明它var exampleImage了.
Kir*_*odd 14
不确定你想要什么,但这个类别方法将掩盖具有指定颜色的UIImage,因此您可以拥有单个图像并将其颜色更改为您想要的任何颜色.
ImageUtils.h
- (UIImage *) maskWithColor:(UIColor *)color;
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ImageUtils.m
-(UIImage *) maskWithColor:(UIColor *)color
{
CGImageRef maskImage = self.CGImage;
CGFloat width = self.size.width;
CGFloat height = self.size.height;
CGRect bounds = CGRectMake(0,0,width,height);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef bitmapContext = CGBitmapContextCreate(NULL, width, height, 8, 0, colorSpace, kCGImageAlphaPremultipliedLast);
CGContextClipToMask(bitmapContext, bounds, maskImage);
CGContextSetFillColorWithColor(bitmapContext, color.CGColor);
CGContextFillRect(bitmapContext, bounds);
CGImageRef cImage = CGBitmapContextCreateImage(bitmapContext);
UIImage *coloredImage = [UIImage imageWithCGImage:cImage];
CGContextRelease(bitmapContext);
CGColorSpaceRelease(colorSpace);
CGImageRelease(cImage);
return coloredImage;
}
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导入ImageUtils类别并执行以下操作...
#import "ImageUtils.h"
...
UIImage *icon = [UIImage imageNamed:ICON_IMAGE];
UIImage *redIcon = [icon maskWithColor:UIColor.redColor];
UIImage *blueIcon = [icon maskWithColor:UIColor.blueColor];
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带有customType的Swift 4:
let button = UIButton(frame: aRectHere)
let buttonImage = UIImage(named: "imageName")
button.setImage(buttonImage?.withRenderingMode(.alwaysTemplate), for: .normal)
button.tintColor = .white
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如果您在 iOS 15 之后到达这里并且正在使用新的UIButton.ConfigurationAPI,那么您可能需要通过imageColorTransformer.
看起来像这样:
configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in .green }
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为了方便起见,您可以创建一个扩展:
extension UIButton.Configuration {
func imageColor(_ color: UIColor) -> UIButton.Configuration {
var configuration = self
configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in color }
return configuration
}
}
// Usage:
configuration = configuration.imageColor(.green)
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与其他答案一样,图像本身必须是 Xcode 资产中或代码中的“渲染为 - 模板图像”image.withRenderingMode(.alwaysTemplate)
额外提示:
如果您希望在按钮突出显示时改变图像颜色怎么办?那么你的配置扩展可以如下所示:
func imageColor(whenNormal: UIColor,
whenHighlighted: UIColor,
isHighlighted: Bool) -> UIButton.Configuration {
var configuration = self
configuration.imageColorTransformer = UIConfigurationColorTransformer { _ in
isHighlighted ? whenHighlighted : whenNormal
}
return configuration
}
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这本身必须从configurationUpdateHandler上下文中调用,如下所示:
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
}
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请注意,configurationUpdateHandler您实际上还可以根据按钮状态定义不同的图像。
对于 Xamarin.iOS (C#):
UIButton messagesButton = new UIButton(UIButtonType.Custom);
UIImage icon = UIImage.FromBundle("Images/icon.png");
messagesButton.SetImage(icon.ImageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate), UIControlState.Normal);
messagesButton.TintColor = UIColor.White;
messagesButton.Frame = new RectangleF(0, 0, 25, 25);
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斯威夫特3:
如果您已经通过 xCode 界面构建器设置了图像,则此解决方案可能会很舒服。基本上你有一个扩展来着色图像:
extension UIImage {
public func image(withTintColor color: UIColor) -> UIImage{
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
let context: CGContext = UIGraphicsGetCurrentContext()!
context.translateBy(x: 0, y: self.size.height)
context.scaleBy(x: 1.0, y: -1.0)
context.setBlendMode(CGBlendMode.normal)
let rect: CGRect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
context.clip(to: rect, mask: self.cgImage!)
color.setFill()
context.fill(rect)
let newImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return newImage
}
}
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然后,您可以准备此UIButton扩展来为特定状态的图像着色:
extension UIButton {
func imageWith(color:UIColor, for: UIControlState) {
if let imageForState = self.image(for: state) {
self.image(for: .normal)?.withRenderingMode(.alwaysTemplate)
let colorizedImage = imageForState.image(withTintColor: color)
self.setImage(colorizedImage, for: state)
}
}
}
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用法:
myButton.imageWith(.red, for: .normal)
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PS(在表格单元格中也很好用,你不需要调用setNeedDisplay()方法,由于UIImage扩展,颜色的变化是立即的..
let button = UIButton(type: .custom)
let image = UIImage(named: "image_name")?.withRenderingMode(.alwaysTemplate)
button.setImage(image, for: .normal)
button.tintColor = UIColor.red
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如果您设置UIButton.tintColor为UIColor(r:g:b:alpha:),请记住将值除以255。这些 RGB 值应介于 0 和 1 之间。
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