laosb/CropImage
1
0
Fork 0
mirror of https://github.com/laosb/CropImage.git synced 2025-04-30 15:41:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Working version.

Browse source
This commit is contained in:
Shibo Lyu 2023-07-24 11:03:11 +08:00
parent 645e4d6b2c
commit 45c2b0ac58
1 changed files with 104 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

118
Sources/CropImage/CropImageView.swift
View file

@ -6,15 +6,62 @@
//
import SwiftUI
#if os(iOS)
import UIKit
#endif
public struct CropImageView: View {
public enum RenderError: Error {
case imageRendererReturnedNil
}
var image: PlatformImage
var targetSize: CGSize
var onCrop: (PlatformImage) -> Void
var targetScale: CGFloat = 1
var onCrop: (Result<PlatformImage, Error>) -> Void
@State private var offset: CGSize = .zero
@State private var scale: CGFloat = 1
@MainActor
func crop() throws -> PlatformImage {
let snapshotView = MoveAndScalableImageView(offset: $offset, scale: $scale, image: image)
.frame(width: targetSize.width, height: targetSize.height)
if #available(iOS 16.0, macOS 13.0, *) {
let renderer = ImageRenderer(content: snapshotView)
renderer.scale = targetScale
#if os(iOS)
if let image = renderer.uiImage {
return image
} else {
throw RenderError.imageRendererReturnedNil
}
#elseif os(macOS)
if let image = renderer.nsImage {
return image
} else {
throw RenderError.imageRendererReturnedNil
}
#endif
} else {
#if os(macOS)
fatalError("Cropping is not supported on macOS versions before Ventrura 13.0.")
#elseif os(iOS)
let window = UIWindow(frame: CGRect(origin: .zero, size: targetSize))
let hosting = UIHostingController(rootView: snapshotView)
hosting.view.frame = window.frame
window.addSubview(hosting.view)
window.makeKeyAndVisible()
UIGraphicsBeginImageContextWithOptions(hosting.view.bounds.size, false, targetScale)
let context = UIGraphicsGetCurrentContext()!
hosting.view.layer.render(in: context)
let image = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return image
#endif
}
}
public var body: some View {
ZStack {
MoveAndScalableImageView(offset: $offset, scale: $scale, image: image)
@ -22,36 +69,79 @@ public struct CropImageView: View {
.fill(style: FillStyle(eoFill: true))
.foregroundColor(.black.opacity(0.6))
.allowsHitTesting(false)
VStack {
Spacer()
HStack {
Spacer()
Button { Task {
do {
onCrop(.success(try crop()))
} catch {
onCrop(.failure(error))
}
} } label: {
Label("Crop", systemImage: "checkmark.circle.fill")
.font(.title2)
.foregroundColor(.accentColor)
.labelStyle(.iconOnly)
.padding(1)
.background(
Circle().fill(.white)
)
}
.buttonStyle(.plain)
.padding()
}
}
}
}
}
struct CropImageView_Previews: PreviewProvider {
struct PreviewView: View {
@State private var croppedImage: PlatformImage? = nil
@State private var targetSize: CGSize = .init(width: 100, height: 100)
@State private var result: Result<PlatformImage, Error>? = nil
var body: some View {
VStack {
CropImageView(
image: .init(contentsOfFile: "/Users/laosb/Downloads/png.png")!,
targetSize: .init(width: 100, height: 100)
) { _ in
}
if let croppedImage {
#if os(macOS)
Image(nsImage: croppedImage)
#elseif os(iOS)
Image(uiImage: croppedImage)
#endif
} else {
Text("Press \(Image(systemName: "checkmark.circle.fill")) to crop.")
targetSize: targetSize
) { result = $0 }
Form {
Section {
TextField("Width", value: $targetSize.width, formatter: NumberFormatter())
TextField("Height", value: $targetSize.height, formatter: NumberFormatter())
} header: { Text("Crop Target Size") }
Section {
if let result {
switch result {
case let .success(croppedImage):
#if os(macOS)
Image(nsImage: croppedImage)
#elseif os(iOS)
Image(uiImage: croppedImage)
#endif
case let .failure(error):
Text(error.localizedDescription)
.foregroundColor(.red)
}
} else {
Text("Press \(Image(systemName: "checkmark.circle.fill")) to crop.")
}
} header: { Text("Result") }
}
#if os(macOS)
.formStyle(.grouped)
#endif
}
}
}
static var previews: some View {
PreviewView()
#if os(macOS)
.frame(minHeight: 750)
#endif
}
}