This is a Category UIImage collection, can be very convenient for the picture to dye (Tinting), increase the brightness (lightening) and reduce the brightness (darkening) and other extensions of the functional modules.
This tutorial includes Objective-C and swift two implementation methods, will be given in the following.
- Xcode 7 +
- iOS 7.0 +
Download DEMO, sub folder kYCategory into the project, import the UIImage+KYCategory.h header file in use.
UIImage+KYCategory is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'UIImage+KYCategory'
Color a picture
qiaoColorImageView.image = [[UIImage imageNamed:@"qiao"] tintedImageWithColor:[UIColor redColor] level:0.5];
In the UIImage+KYCategory_swift project to achieve a picture of the expansion, the specific implementation is as follows:
import UIKit
extension UIImage {
/// Just change a colored color image, is to change the image TintColo
///
/// - Parameter tintColor: Need to change the color of the color
/// - Returns: Returns an image
func imageWithTintColor (tintColor: UIColor? = nil, alpha: CGFloat) -> UIImage? {
let rect = CGRect(x: 0.0, y: 0.0, width: self.size.width, height: self.size.height)
UIGraphicsBeginImageContextWithOptions(rect.size,false,self.scale)
draw(in: rect)
let ctx = UIGraphicsGetCurrentContext()
ctx!.setFillColor((tintColor?.cgColor)!)
ctx!.setAlpha(alpha);
ctx?.setBlendMode(.sourceAtop)
ctx!.fill(rect);
let result = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return result
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let gift01ImageView = UIImageView(image: UIImage(named: "ic-gift"))
gift01ImageView.frame = CGRect(x: 50.0, y: 50.0, width: 48.0, height: 48.0)
self.view!.addSubview(gift01ImageView)
let gift02ImageView = UIImageView(image: UIImage(named: "ic-gift")?.imageWithTintColor(tintColor: UIColor.blue, alpha: 0.5))
gift02ImageView.frame = CGRect(x: 125.0, y: 50.0, width: 48.0, height: 48.0)
self.view!.addSubview(gift02ImageView)
}
Effect as shown below:
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UIImage+KYCategory is licensed under the MIT protocol. Access to the LICENSE file for more information.