如何在iOS和WatchKit中更改圖像tintColor

本文翻譯自：How can I change image tintColor in iOS and WatchKit

I have an UIImageView called "theImageView", with UIImage in a single color (transparent background) just like the left black heart below.

我有一個名為“ theImageView”的UIImageView，UIImage具有單色（透明背景），就像下面的黑色左心一樣。

How can I change the tint color of this image programmatically in iOS 7 or above, as per the tint method used in the iOS 7+ Navigation Bar icons?

如何按照iOS 7+導航欄圖示中使用的着色方法，在iOS 7或更高版本中以程式設計方式更改此圖像的着色顔色？

Can this method also work in WatchKit for an Apple Watch app?

此方法也可以在Apple Watch應用程式的WatchKit中使用嗎？

#1樓

參考：https://stackoom.com/question/1IsFh/如何在iOS和WatchKit中更改圖像tintColor

#2樓

Here's a category that should do the trick

這是應該解決的問題

@interface UIImage(Overlay)
@end

@implementation UIImage(Overlay)

- (UIImage *)imageWithColor:(UIColor *)color1
{
        UIGraphicsBeginImageContextWithOptions(self.size, NO, self.scale);
        CGContextRef context = UIGraphicsGetCurrentContext();
        CGContextTranslateCTM(context, 0, self.size.height);
        CGContextScaleCTM(context, 1.0, -1.0);
        CGContextSetBlendMode(context, kCGBlendModeNormal);
        CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
        CGContextClipToMask(context, rect, self.CGImage);
        [color1 setFill];
        CGContextFillRect(context, rect);
        UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        return newImage;
}
@end
           

so you would do:

是以你會做：

theImageView.image = [theImageView.image imageWithColor:[UIColor redColor]];
           

#3樓

I had to do this in Swift using an

extension

.

我必須在Swift中使用

extension

執行此操作。

I thought I'd share how I did it:

我以為我會分享我的做法：

extension UIImage {
    func imageWithColor(color1: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
        color1.setFill()

        let context = UIGraphicsGetCurrentContext() as CGContextRef
        CGContextTranslateCTM(context, 0, self.size.height)
        CGContextScaleCTM(context, 1.0, -1.0);
        CGContextSetBlendMode(context, CGBlendMode.Normal)

        let rect = CGRectMake(0, 0, self.size.width, self.size.height) as CGRect
        CGContextClipToMask(context, rect, self.CGImage)
        CGContextFillRect(context, rect)

        let newImage = UIGraphicsGetImageFromCurrentImageContext() as UIImage
        UIGraphicsEndImageContext()

        return newImage
    }
}
           

Usage:

用法：

theImageView.image = theImageView.image.imageWithColor(UIColor.redColor())

Swift 4

斯威夫特4

extension UIImage {
    func imageWithColor(color1: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
        color1.setFill()

        let context = UIGraphicsGetCurrentContext()
        context?.translateBy(x: 0, y: self.size.height)
        context?.scaleBy(x: 1.0, y: -1.0)
        context?.setBlendMode(CGBlendMode.normal)

        let rect = CGRect(origin: .zero, size: CGSize(width: self.size.width, height: self.size.height))
        context?.clip(to: rect, mask: self.cgImage!)
        context?.fill(rect)

        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return newImage!
    }
}
           

Usage:

用法：

theImageView.image = theImageView.image?.imageWithColor(color1: UIColor.red)

#4樓

Try this

嘗試這個

http://robots.thoughtbot.com/designing-for-ios-blending-modes

http://robots.thoughtbot.com/designing-for-ios-blending-modes

or

要麼

- (void)viewDidLoad
{
[super viewDidLoad];

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 50)];
label.numberOfLines = 0;
label.font = [UIFont systemFontOfSize:13];
label.text = @"These checkmarks use the same gray checkmark image with a tintColor applied to the image view";
[self.view addSubview:label];

[self _createImageViewAtY:100 color:[UIColor purpleColor]];
}

- (void)_createImageViewAtY:(int)y color:(UIColor *)color {
UIImage *image = [[UIImage imageNamed:@"gray checkmark.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CGRect frame = imageView.frame;
frame.origin.x = 100;
frame.origin.y = y;
imageView.frame = frame;

if (color)
    imageView.tintColor = color;

[self.view addSubview:imageView];
}
           

#5樓

iOS

iOS版

For an iOS app, in Swift 3 or 4:

對于iOS應用，在Swift 3或4中：

theImageView.image = theImageView.image?.withRenderingMode(.alwaysTemplate)
theImageView.tintColor = UIColor.red
           

Swift 2:

斯威夫特2：

theImageView.image = theImageView.image?.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
theImageView.tintColor = UIColor.redColor()
           

Meanwhile, the modern Objective-C solution is:

同時，現代的Objective-C解決方案是：

theImageView.image = [theImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[theImageView setTintColor:[UIColor redColor]];
           

Watchkit

Watchkit

In WatchKit for Apple Watch apps, you can set the tint color for a template image .

在Apple Watch應用程式的WatchKit中，您可以設定模闆圖像的色調顔色 。

1. You must add your image to an Asset Catalog in your WatchKit App, and set the image set to be rendered as a Template Image in the Attributes Inspector. 您必須将圖像添加到WatchKit App的資産目錄中，并在Attributes Inspector中将圖像集設定為呈現為模闆圖像。 Unlike for an iPhone app, you cannot set the template rendering in code in the WatchKit Extension at present. 與iPhone應用程式不同，目前您無法在WatchKit Extension中的代碼中設定模闆渲染。
2. Set that image to be used in your WKInterfaceImage in interface builder for your app 設定要在應用程式的界面生成器中的WKInterfaceImage中使用的圖像
3. Create an IBOutlet in your WKInterfaceController for the WKInterfaceImage called 'theImage'... 在WKInterfaceController中為名為'theImage'的WKInterfaceImage建立一個IBOutlet ...

To then set the tint color in Swift 3 or 4:

然後在Swift 3或4中設定色調顔色：

theImage.setTintColor(UIColor.red)
           

Swift 2:

斯威夫特2：

theImage.setTintColor(UIColor.redColor())
           

To then set the tint color in Objective-C:

然後在Objective-C中設定色調顔色：

[self.theImage setTintColor:[UIColor redColor]];
           

If you use a template image and do not apply a tint colour, the Global Tint for your WatchKit app will be applied.

如果您使用模闆圖像并且不應用色調顔色，則将應用WatchKit應用程式的“全局色調”。

If you have not set a Global Tint,

theImage

will be tinted light blue by default when used as a template image.

如果尚未設定全局色調，則在用作模闆圖像時，預設情況下，

theImage

将淡藍色。

#6樓

With Swift

與斯威夫特

let commentImageView = UIImageView(frame: CGRectMake(100, 100, 100, 100))
commentImageView.image = UIImage(named: "myimage.png")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
commentImageView.tintColor = UIColor.blackColor()
addSubview(commentImageView)