ios - 使用swift，iOS 13.4是否具有类CIVibrance或字符串“CIVibrance”或方法CIFilter()。vibrance()？

快速查找类CIVibrance或字符串“CIVibrance”或类似CIFilter()。vibrance()的方法。查看这些文档，其中一些似乎很快无法使用，但是其他一些Xcode却不见了。 (iOS 13.4 Xcode 11.5)

https://developer.apple.com/documentation/coreimage/cifilter/3228429-vibrance
https://developer.apple.com/documentation/coreimage/civibrance?language=occ

import UIKit
import CoreImage

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    func test() {
        let ciFilter = CIFilter()

        let ciVibrance = ciFilter.vibrance() // error
        let ciVibrance2 = CIFilter.vibrance() // error
        let ciVibrance3 = CIVibrance() // error
    }
}

最佳答案

您可以按shift + command + o(字母“oh”)或选择“文件”»“快速打开...”菜单，然后搜索方法或类名:



这通常会为您提供可能的线索。在这种情况下:

import CoreImage.CIFilterBuiltins

例如:

import UIKit
import CoreImage.CIFilterBuiltins

class ViewController: UIViewController {
    @IBOutlet weak var imageView1: UIImageView!
    @IBOutlet weak var imageView2: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        imageView2.image = vibrantImage()
    }

    func vibrantImage() -> UIImage? {
        guard let input = UIImage(named: "flower.jpg")?.cgImage else {
            return nil
        }

        let filter = CIFilter.vibrance()
        filter.amount = 1
        filter.inputImage = CIImage(cgImage: input)
        return filter.outputImage.flatMap { UIImage(ciImage: $0) }
    }
}

产量:



(左侧为original image，右侧为生动的演绎)

关于ios - 使用swift，iOS 13.4是否具有类CIVibrance或字符串“CIVibrance”或方法CIFilter()。vibrance()？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/62289753/