如何获取NSView的"屏幕截图"？
获取NSView的"屏幕截图"可以通过以下几种方式：
- 使用NSView的
draw(_ dirtyRect:)方法来绘制整个屏幕的截图。class MyView: NSView { override func draw(_ dirtyRect: NSRect) { super.draw(dirtyRect) let cgContext = NSGraphicsContext.current!.cgContext let screenSize = CGSize(width: Int(CGDisplayPixelsWide(CGMainDisplayID())), height: Int(CGDisplayPixelsHigh(CGMainDisplayID()))) // 设置CGContext的参数 cgContext.setFillColorSpace(NSColorSpace.displayP3) cgContext.setRenderingIntent(NSColorRenderingIntent.absoluteColorRendering) // 设置要截取的颜色（可以使用任何颜色） let color = NSColor.black // 截取屏幕 cgContext.fillScreen(from: NSRect(x: 0, y: 0, width: screenSize.width, height: screenSize.height)) // 绘制要截取的颜色 color.set() cgContext.drawRect(NSRect(x: 0, y: 0, width: screenSize.width, height: screenSize.height), withStroke) // 保存截图到指定路径 let screenshotURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("screenshot.png") if let imageData = cgContext.makeImage() { try? imageData.write(to: screenshotURL) } } } - 使用Core Graphics框架来截取屏幕。class MyView: NSView { override func draw(_ dirtyRect: NSRect) { super.draw(dirtyRect) let context = CGContext(data: nil, width: Int(CGDisplayPixelsWide(CGMainDisplayID())), height: Int(CGDisplayPixelsHigh(CGMainDisplayID()))) context.setFillColorSpace(NSColorSpace.displayP3) context.setRenderingIntent(NSColorRenderingIntent.absoluteColorRendering) context.fillScreen() let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.none.rawValue) let context = CGContext(data: nil, width: Int(CGDisplayPixelsWide(CGMainDisplayID())), height: Int(CGDisplayPixelsHigh(CGMainDisplayID())), bitsPerComponent: 8, bytesPerRow: 0, space: CGColorSpaceCreateWithName(CGColorSpace.displayP3), bitmapInfo: bitmapInfo.rawValue) context.draw(NSBitmapImageRep(nsimage: NSRect(x: 0, y: 0, width: 1024, height: 768)), in: NSRect(x: 0, y: 0, width: 1024, height: 768), options: [.usesPremultipliedAlpha: true]) let screenshotURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("screenshot.png") if let imageData = context.makeImage() { try? imageData.write(to: screenshotURL) } } }
- 使用第三方库，如SwiftSoup、Alamofire、SwiftyJSON等来截取网页或JSON数据。import SwiftSoup
class MyView: NSView {
override func draw(_ dirtyRect: NSRect) { super.draw(dirtyRect) let htmlString = "<html><body><h1>Hello, World!</h1></body></html>" let soup = SwiftSoup.parse(htmlString) if let element = soup.element("h1") { element.draw(in: NSRect(x: 10, y: 10, width: 200, height: 30)) } let screenshotURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("screenshot.png") if let imageData = soup.render(as: NSImage.self, from: NSRect(x: 0, y: 0, width: 200, height: 30)) { try? imageData.write(to: screenshotURL相关·内容
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